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70. CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES 
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71.   Electronic structure of bulk materials (see section 73 for surfaces, interfaces, low-dimensional structures, and nanomaterials)

71.10.-w   Theories and models of many-electron systems

71.10.Ay   Fermi-liquid theory and other phenomenological models 

71.10.Ca   Electron gas, Fermi gas 

71.10.Fd   Lattice fermion models (Hubbard model, etc.) 

71.10.Hf   Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model systems 

71.10.Li   Excited states and pairing interactions in model systems 

71.10.Pm   Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) (for anyon mechanism in superconductors, see 74.20.Mf)

71.15.-m   Methods of electronic structure calculations (see also 31.15.-p Calculations and mathematical techniques in atomic and molecular physics) 

71.15.Ap  Basis sets (plane-wave, APS, LCAO, etc.) and related methodology (scattering methods, ASA, linearized methods)

71.15.Dx  Computational methodology (Brillouin zone sampling, iterative diagonalization, pseudopotential construction) 

71.15.Mb   Density functional theory, local density approximation, gradient and other
corrections

71.15.Nc   Total energy and cohesive energy calculations 

71.15.Pd   Molecular dynamics calculations (Car–Parrinello) and other numerical simulations 

71.15.Qe   Excited states:  methodology (see also 71.10.Li)

71.15.Rf   Relativistic effects 

71.18.+y   Fermi surface: calculations and measurements; effective mass, g factor

71.20.-b   Electron density of states and band structure of crystalline solids (for electronic structure of superconductors, see 74.25.Jb)

71.20.Be   Transition metals and alloys 

71.20.Dg   Alkali and alkaline earth metals 

71.20.Eh   Rare earth metals and alloys 

71.20.Gj   Other metals and alloys 

71.20.Lp   Intermetallic compounds 

71.20.Mq   Elemental semiconductors 

71.20.Nr   Semiconductor compounds 

71.20.Ps   Other inorganic compounds 

71.20.Rv   Polymers and organic compounds 

71.20.Tx   Fullerenes and related materials; intercalation compounds 

... ... ...     Photonic band-gap materials, see 42.70.Qs

71.22.+i   Electronic structure of liquid metals and semiconductors and their alloys

71.23.-k   Electronic structure of disordered solids

71.23.An   Theories and models; localized states 

71.23.Cq   Amorphous semiconductors, metallic glasses, glasses 

71.23.Ft   Quasicrystals 

71.27.+a   Strongly correlated electron systems; heavy fermions

71.28.+d   Narrow-band systems; intermediate-valence solids(for magnetic aspects, see 75.20.Hr and 75.30.Mb)

71.30.+h   Metal–insulator transitions and other electronic transitions

71.35.-y    Excitons and related phenomena

71.35.Aa    Frenkel excitons and self-trapped excitons 

71.35.Cc    Intrinsic properties of excitons; optical absorption spectra 

71.35.Ee   Electron-hole drops and electron-hole plasma 

71.35.Gg   Exciton-mediated interactions 

71.35.Ji   Excitons in magnetic fields; magnetoexcitons 

71.35.Lk   Collective effects (Bose effects, phase space filling, and excitonic phase transitions) 

71.36.+c   Polaritons (including photon–phonon and photon–magnon interactions)

71.38.-k   Polarons and electron-phonon interactions (see also 63.20.Kr Phonon-electron interactions in lattices)

71.38.Cn  Mass renormalization in metals 

71.38.Fp   Large or Fröhlich polarons 

71.38.Ht   Self-trapped or small polarons 

71.38.Mx   Bipolarons 

71.45.-d   Collective effects

71.45.Gm   Exchange, correlation, dielectric and magnetic response functions, plasmons 

71.45.Lr   Charge-density-wave systems (see also 75.30.Fv Spin-density waves)

71.55.-i   Impurity and defect levels

71.55.Ak   Metals, semimetals, and alloys 

71.55.Cn   Elemental semiconductors 

71.55.Eq   III–V semiconductors 

71.55.Gs   II–VI semiconductors 

71.55.Ht   Other nonmetals 

71.55.Jv   Disordered structures; amorphous and glassy solids 

71.60.+z   Positron states (for positron annihilation, see 78.70.Bj)

71.70.-d   Level splitting and interactions (see also 73.20 Surface and interface electron states, 75.30.Et Exchange and superexchange interactions)

71.70.Ch   Crystal and ligand fields 

71.70.Di   Landau levels 

71.70.Ej   Spin–orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect 

71.70.Fk   Strain-induced splitting 

71.70.Gm   Exchange interactions 

71.70.Jp   Nuclear states and interactions 

71.90.+q   Other topics in electronic structure (restricted to new topics in section 71)

72.   Electronic transport in condensed matter (for electronic transport in surfaces, interfaces, and thin films, see 73; for electrical properties related to treatment conditions, see 81.40.Rs)

72.10.-d   Theory of electronic transport; scattering mechanisms

72.10.Bg   General formulation of transport theory 

72.10.Di   Scattering by phonons, magnons, and other nonlocalized excitations (see also 71.45 Collective effects)

72.10.Fk    Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect) 

72.15.-v    Electronic conduction in metals and alloys

72.15.Cz   Electrical and thermal conduction in amorphous and liquid metals and alloys 

72.15.Eb   Electrical and thermal conduction in crystalline metals and alloys 

72.15.Gd   Galvanomagnetic and other magnetotransport effects (for giant magnetoresistance, see 75.70.Pa)

72.15.Jf   Thermoelectric and thermomagnetic effects 

72.15.Lh   Relaxation times and mean free paths 

72.15.Nj   Collective modes (e.g., in one-dimensional conductors) 

72.15.Qm   Scattering mechanisms and Kondo effect (see also 75.20.Hr Local moments in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions)

72.15.Rn   Localization effects (Anderson or weak localization) 

72.20.-i   Conductivity phenomena in semiconductors and insulators (see also 66.70 Nonelectronic thermal conduction in solids)

72.20.Dp   General theory, scattering mechanisms 

72.20.Ee    Mobility edges; hopping transport 

72.20.Fr   Low-field transport and mobility; piezoresistance 

72.20.Ht   High-field and nonlinear effects 

72.20.Jv    Charge carriers: generation, recombination, lifetime, and trapping 

72.20.My   Galvanomagnetic and other magnetotransport effects 

72.20.Pa   Thermoelectric and thermomagnetic effects 
 
72.25.-b Spin polarized transport

72.25.Ba Spin polarized transport in metals

72.25.Dc Spin polarized transport in semiconductors

72.25.Fe Optical creation of spin polarized carriers

72.25.Hg Electrical injection of spin polarized carriers

72.25.Mk Spin transport through interfaces

72.25.Pn Current-driven spin pumping

72.25.Rb Spin relaxation and scattering

72.30.+q   High-frequency effects; plasma effects

72.40.+w   Photoconduction and photovoltaic effects

72.50.+b   Acoustoelectric effects

72.55.+s   Magnetoacoustic effects (see also 75.80 Magnetomechanical effects)

72.60.+g   Mixed conductivity and conductivity transitions

72.70.+m   Noise processes and phenomena

72.80.-r   Conductivity of specific materials (for conductivity of metals and alloys, see 72.15)

72.80.Cw   Elemental semiconductors 

72.80.Ey   III–V and II–VI semiconductors 

72.80.Ga   Transition-metal compounds 

72.80.Jc   Other crystalline inorganic semiconductors 

72.80.Le   Polymers; organic compounds (including organic semiconductors) 

72.80.Ng   Disordered solids 

72.80.Ph   Liquid semiconductors 

72.80.Rj   Fullerenes and related materials 

72.80.Sk   Insulators 

72.80.Tm   Composite materials 

72.90.+y   Other topics in electronic transport in condensed matter (restricted to new topics in section 72)

73.   Electronic structure and electrical properties of surfaces, interfaces,  thin films, and low-dimensional structures (for electronic structure and electrical properties of superconducting films, see  74.76; for computational methodology use 71.15.-m) 

73.20.-r   Electron states at surfaces and interfaces

73.20.At   Surface states, band structure, electron density of states 

73.20.Fz   Weak or Anderson localization 

73.20.Hb   Impurity and defect levels; energy states of adsorbed species 

73.20.Jc   Delocalization processes 

73.20.Mf   Collective excitations (including excitons, polarons, plasmons 
                       and other charge-density  excitations) (for collective excitations 
                       in quantum Hall effects, see 73.43.Lp 

73.20.Qt   Electron solids 

73.21.-b   Electron states and collective excitations in multilayers, 
                       quantum wells, mesoscopic,  and nanoscale systems (for 
                        electron states in nanoscale materials, see 73.22.-f)

73.21.Ac   Multilayers 

73.21.Cd   Superlattices 

73.21.Fg   Quantum wells 

73.21.Hb   Quantum wires 

73.21.La    Quantum dots 

73.22.-f     Electronic structure of nanoscale materials:  clusters, 
                        nanoparticles, nanotubes, and nanocrystals

73.22.Dj    Single particle states 

73.22.Gk    Broken symmetry phases 

73.22.Lp    Collective excitations 

73.23.-b     Electronic transport in mesoscopic systems

73.23.Ad    Ballistic transport 

73.23.Hk    Coulomb blockade; single-electron tunneling 

73.23.Ra    Persistent currents 

73.25.+i    Surface conductivity and carrier phenomena

73.30.+y   Surface double layers, Schottky barriers, and work functions

73.40.-c    Electronic transport in interface structures

73.40.Cg   Contact resistance, contact potential 

73.40.Ei   Rectification 

73.40.Gk   Tunneling (for tunneling in quantum Hall effects, see 73.43.Jn) 

73.40.Jn   Metal-to-metal contacts 

73.40.Kp   III–V semiconductor-to-semiconductor contacts, pn junctions, and heterojunctions 

73.40.Lq   Other semiconductor-to-semiconductor contacts, pn junctions, and heterojunctions 

73.40.Mr   Semiconductor–electrolyte contacts 

73.40.Ns   Metal–nonmetal contacts 

73.40.Qv   Metal–insulator–semiconductor structures (including semiconductor-to-insulator) 

73.40.Rw   Metal–insulator–metal structures 

73.40.Sx   Metal–semiconductor–metal structures 

73.40.Ty   Semiconductor–insulator–semiconductor structures 

73.40.Vz   Semiconductor–metal–semiconductor structures 

73.43.-f   Quantum Hall effects

73.43.Cd   Theory and modeling 

73.43.Fj   Novel experimental methods; measurements 

73.43.Jn   Tunneling 

73.43.Lp   Collective excitations 

73.43.Nq  Quantum phase transitions 

73.43.Qt   Magnetoresistance 

... ... ...         Optical measurements, see 78.66.-w

73.50.-h   Electronic transport phenomena in thin films (for electronic transport in mesoscopic systems and interface structures, see 73.23.-b and 73.40.-c respectively; for electronic transport in nanoscale materials and structures, see 73.63.-b

73.50.Bk   General theory, scattering mechanisms 

73.50.Dn   Low-field transport and mobility; piezoresistance 

73.50.Fq   High-field and nonlinear effects 

73.50.Gr   Charge carriers: generation, recombination, lifetime, trapping, mean free paths 

73.50.Jt   Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects) 

73.50.Lw   Thermoelectric effects 

73.50.Mx   High-frequency effects; plasma effects 

73.50.Pz   Photoconduction and photovoltaic effects 

73.50.Rb   Acoustoelectric and magnetoacoustic effects 

73.50.Td   Noise processes and phenomena 

73.61.-r   Electrical properties of specific thin films (for optical properties of thin films, see 78.20 and 78.66; for magnetic properties of thin films, see 75.70)

73.61.At   Metal and metallic alloys 

73.61.Cw   Elemental semiconductors 

73.61.Ey   III–V semiconductors 

73.61.Ga   II–VI semiconductors 

73.61.Jc   Amorphous semiconductors; glasses 

73.61.Le   Other inorganic semiconductors 

73.61.Ng   Insulators 

73.61.Ph   Polymers; organic compounds 

73.61.Wp   Fullerenes and related materials 

73.63.-b  Electronic transport in mesoscopic or nanoscale materials and structures

73.63.Bd   Nanocrystalline materials 

73.63.Fg   Nanotubes 

73.63.Hs   Quantum wells 

73.63.Kv   Quantum dots 

73.63.Nm   Quantum wires 

73.63.Rt   Nanoscale contacts 

73.90.+f   Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures (Restricted to new topics in section 73)

74.   Superconductivity

74.10.+v   Occurrence, potential candidates

74.20.-z   Theories and models of superconducting state

74.20.De   Phenomenological theories (two-fluid, Ginzburg-Landau, etc.) 

74.20.Fg   BCS theory and its development 

74.20.Mn   Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) 

74.20.Rp   Pairing symmetries (other than s-wave) 

74.25.-q   General properties; correlations between physical properties in normal and superconducting states

74.25.Bt   Thermodynamic properties 

74.25.Dw   Superconductivity phase diagrams 

74.25.Fy   Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) 

74.25.Gz   Optical properties 

74.25.Ha   Magnetic properties 

74.25.Jb   Electronic structure 

74.25.Kc   Phonons 

74.25.Ld   Mechanical and acoustical properties, elasticity, and ultrasonic attenuation 

74.25.Nf   Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) 

74.40.+k   Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)

74.50.+r   Proximity effects, weak links, tunneling phenomena, and Josephson effects

74.55.+h   Type-I superconductivity

74.60.-w   Type-II superconductivity

74.60.Ec   Mixed state, critical fields, and surface sheath 

74.60.Ge   Flux pinning, flux creep, and flux-line lattice dynamics 

74.60.Jg   Critical currents 

74.62.-c   Transition temperature variations

74.62.Bf   Effects of material synthesis, crystal structure, and chemical composition 

74.62.Dh   Effects of crystal defects, doping and substitution 

74.62.Fj   Pressure effects 

74.62.Yb   Other effects 

74.70.-b   Superconducting materials (excluding high-Tc compounds)

74.70.Ad   Metals; alloys and binary compounds (including A15, Laves phases, etc.) 

74.70.Dd    Ternary, quaternary and multinary compounds (including Chevrel phases, borocarbides etc.) 

74.70.Kn   Organic superconductors 

74.70.Pq   Ruthenates 

74.70.Tx   Heavy-fermion superconductors 

74.70.Wz   Fullerenes and related materials 

74.72.-h   High-Tc compounds

74.72.Bk   Y-based cuprates 

74.72.Dn   La-based cuprates 

74.72.Fq   Tl-based cuprates 

74.72.Gr   Hg-base cuprates 

74.72.Hs   Bi-based cuprates 

74.72.Jt   Other cuprates 

74.76.-w   Superconducting films

74.76.Bz   High-Tc films 

74.76.Db   Conventional superconducting films 

74.80.-g   Spatially inhomogeneous structures

74.80.Bj    Granular, melt-textured, and amorphous superconductors; powders 

74.80.Dm   Superconducting layer structures: superlattices, heterojunctions, and multilayers 

74.80.Fp   Point contacts; SN and SNS junctions 

... ... ...     Superconducting devices, see 85.25

74.90.+n   Other topics in superconductivity (restricted to new topics in section 74)

75.   Magnetic properties and materials (for magnetic properties related to treatment conditions, see 81.40.Rs; for magnetic properties of rocks and minerals, see 91.60.Pn)

75.10.-b   General theory and models of magnetic ordering(see also 05.50 Lattice theory and statistics)

75.10.Dg   Crystal-field theory and spin Hamiltonians 

75.10.Hk   Classical spin models 

75.10.Jm   Quantized spin models 

75.10.Lp   Band and itinerant models 

75.10.Nr   Spin-glass and other random models 

75.20.-g   Diamagnetism, paramagnetism, and superparamagnetism 

75.20.Ck   Nonmetals 

75.20.En   Metals and alloys 

75.20.Hr   Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions (see also 72.15.Qm Scattering mechanisms and Kondo effect in electronic conduction of metals and alloys)

75.25.+z   Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)

75.30.-m   Intrinsic properties of magnetically ordered materials (for critical point effects, see 75.40)

75.30.Cr   Saturation moments and magnetic susceptibilities 

75.30.Ds   Spin waves (for spin-wave resonance, see 76.50)

75.30.Et   Exchange and superexchange interactions (see also 71.70 Level splitting and interactions)

75.30.Fv   Spin-density waves 

75.30.Gw   Magnetic anisotropy 

75.30.Hx   Magnetic impurity interactions 

75.30.Kz   Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.) 

75.30.Mb   Valence fluctuation, Kondo lattice, and heavy-fermion phenomena (see also 71.27 Strongly correlated electron systems, heavy fermions)

75.30.Sg   Magnetocaloric effect, magnetic cooling 

75.30.Vn   Colossal magnetoresistance 

75.40.-s   Critical-point effects, specific heats, short-range order (see also 65.40 Heat capacities of solids)

75.40.Cx   Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) 

75.40.Gb   Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) 

75.40.Mg    Numerical simulation studies 

75.45.+j   Macroscopic quantum phenomena in magnetic systems

75.50.-y   Studies of specific magnetic materials

75.50.Bb   Fe and its alloys 

75.50.Cc   Other ferromagnetic metals and alloys 

75.50.Dd   Nonmetallic ferromagnetic materials 

75.50.Ee   Antiferromagnetics 

75.50.Gg   Ferrimagnetics 

75.50.Kj   Amorphous and quasicrystalline magnetic materials 

75.50.Lk   Spin glasses and other random magnets 

75.50.Mm   Magnetic liquids 

75.50.Pp   Magnetic semiconductors 

75.50.Ss   Magnetic recording materials (see also 85.70 Magnetic devices)

75.50.Tt   Fine-particle systems; nanocrystalline materials 

75.50.Vv   High coercivity materials 

75.50.Ww   Permanent magnets 

75.50.Xx    Molecular magnets 

75.60.-d   Domain effects, magnetization curves, and hysteresis

75.60.Ch   Domain walls and domain structure (for magnetic bubbles, see 75.70.Kw)

75.60.Ej   Magnetization curves, hysteresis, Barkhausen and related effects 

75.60.Jk   Magnetization reversal mechanisms 

75.60.Lr   Magnetic aftereffects 

75.60.Nt   Magnetic annealing and temperature–hysteresis effects 

75.70.-i  Magnetic properties of thin films, surfaces, and interfaces (for magnetic properties of nanostructures, see 75.75.+a)

75.70.Ak   Magnetic properties of monolayers and thin films 

75.70.Cn   Interfacial magnetic properties (multilayers, superlattices) 

75.70.Kw   Domain structure (including magnetic bubbles) 

75.70.Pa   Giant magnetoresistance 

75.70.Rf  Surface magnetism 

75.75.+a   Magnetic properties of nanostructures

75.80.+q   Magnetomechanical and magnetoelectric effects, magnetostriction

... ... ...     Galvanomagnetic effects, see 72.15.Gd and 72.20.My

... ... ...     Magnetooptical effects, see 78.20.Ls

75.90.+w   Other topics in magnetic properties and materials (restricted to new topics in section 75)

76.   Magnetic resonances and relaxations in condensed matter, Mössbauer effect

76.20.+q   General theory of resonances and relaxations

76.30.-v   Electron paramagnetic resonance and relaxation (see also 33.35 Electron resonance and relaxation in atomic and molecular physics)

76.30.Da   Ions and impurities: general 

76.30.Fc   Iron group (3d) ions and impurities (Ti–Cu) 

76.30.He   Platinum and palladium group (4d and 5d) ions and impurities (Zr–Ag and Hf–Au) 

76.30.Kg   Rare-earth ions and impurities 

76.30.Lh   Other ions and impurities 

76.30.Mi   Color centers and other defects 

76.30.Pk   Conduction electrons 

76.30.Rn   Free radicals 

76.40.+b   Diamagnetic and cyclotron resonances

76.50.+g   Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance (see also 75.30.Ds Spin waves)

76.60.-k   Nuclear magnetic resonance and relaxation (see also 33.25 Nuclear resonance and relaxation in atomic and molecular physics and 82.56.-b in physical chemistry and chemical physics)

76.60.Cq   Chemical and Knight shifts 

76.60.Es   Relaxation effects 

76.60.Gv   Quadrupole resonance 

76.60.Jx   Effects of internal magnetic fields 

76.60.Lz   Spin echoes 

76.60.Pc   NMR imaging (for medical NMR imaging, see 87.61)

76.70.-r   Magnetic double resonances and cross effects(see also 33.40 multiple resonances in atomic and molecular physics)

76.70.Dx   Electron–nuclear double resonance (ENDOR), electron double resonance (ELDOR) 

76.70.Fz   Double nuclear magnetic resonance (DNMR), dynamical nuclear polarization 

76.70.Hb   Optically detected magnetic resonance (ODMR) 

76.75.+i   Muon spin rotation and relaxation

76.80.+y   Mössbauer effect; other  gamma-ray spectroscopy (see also 33.45 Mössbauer spectra—in atomic and molecular physics)

... ... ...     Magnetic resonance spectrometers, 07.57.Pt

76.90.+d   Other topics in magnetic resonances and relaxations (restricted to new topics in section 76)

77.   Dielectrics, piezoelectrics, and ferroelectrics and their properties (for conductivity phenomena, see 72.20 and 72.80; for dielectric properties related to treatment conditions, see 81.40.Tv)

77.22.-d   Dielectric properties of solids and liquids

77.22.Ch   Permittivity (dielectric function) 

77.22.Ej   Polarization and depolarization 

77.22.Gm    Dielectric loss and relaxation 

77.22.Jp   Dielectric breakdown and space-charge effects 

77.55.+f   Dielectric  thin films

77.65.-j   Piezoelectricity and electromechanical effects

77.65.Bn   Piezoelectric and electrostrictive constants 

77.65.Dq   Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics (see also 43.35.Pt Surface waves in solids and liquids—in acoustics appendix; for surface acoustic wave transducers, see 43.38.Rh—in acoustics appendix)

77.65.Fs   Electromechanical resonance; quartz resonators 

77.65.Ly   Strain-induced piezoelectric fields 

77.70.+a   Pyroelectric and electrocaloric effects

77.80.-e   Ferroelectricity and antiferroelectricity

77.80.Bh   Phase transitions and Curie point 

77.80.Dj   Domain structure; hysteresis 

77.80.Fm   Switching phenomena 

77.84.-s   Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials (for nonlinear optical materials, see 42.70.Mp)

77.84.Bw   Elements, oxides, nitrides, borides, carbides, chalcogenides, etc. 

77.84.Dy    Niobates, titanates, tantalates, PZT ceramics, etc. 

77.84.Fa   KDP- and TGS-type crystals 

77.84.Jd   Polymers; organic compounds 

77.84.Lf   Composite materials 

77.84.Nh   Liquids, emulsions, and suspensions; liquid crystals (for structure of liquid crystals, see 61.30)

77.90.+k   Other topics in dielectrics, piezoelectrics, and ferroelectrics and their properties (restricted to new topics in section 77)

78.   Optical properties, condensed-matter spectroscopy and other interactions of radiation and particles with condensed matter

78.20.-e   Optical properties of bulk materials and thin films (for optical properties related to materials treatment, see 81.40.Tv; for optical materials, see 42.70; for optical properties of rocks and minerals, see 91.60.Mk)

78.20.Bh   Theory, models, and numerical simulation 

78.20.Ci   Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity) 

78.20.Ek   Optical activity 

78.20.Fm   Birefringence 

78.20.Hp   Piezo-, elasto-, and acoustooptical effects; photoacoustic effects 

78.20.Jq   Electrooptical effects 

78.20.Ls   Magnetooptical effects 

78.20.Nv   Thermooptical and photothermal effects 

... ... ...     Nonlinear optical properties, see 42.65

78.30.-j   Infrared and Raman spectra (for vibrational states in crystals and disordered systems, see 63.20 and 63.50 respectively)

78.30.Am   Elemental semiconductors and insulators 

78.30.Cp   Liquids 

78.30.Er   Solid metals and alloys 

78.30.Fs   III–V and II–VI semiconductors 

78.30.Hv   Other nonmetallic inorganics 

78.30.Jw   Organic compounds, polymers 

78.30.Ly   Disordered solids 

78.30.Na   Fullerenes and related materials 

78.35.+c   Brillouin and Rayleigh scattering; other light scattering (for Raman scattering, see 78.30)

78.40.-q   Absorption and reflection spectra: visible and ultraviolet (for infrared spectra, see 78.30)

78.40.Dw   Liquids 

78.40.Fy   Semiconductors 

78.40.Ha   Other nonmetallic inorganics 

78.40.Kc   Metals, semimetals, and alloys 

78.40.Me   Organic compounds and polymers 

78.40.Pg   Disordered solids 

78.40.Ri   Fullerenes and related materials 

78.45.+h   Stimulated emission (see also 42.55 Lasers)

78.47.+p   Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter (see also 42.65.Re—in nonlinear optics;  82.53.-k Femtochemistry in physical chemistry and chemical physics) 

... ... ... Impurity and defect absorption in solids, see 78.30 and 78.40

78.55.-m   Photoluminescence

78.55.Ap   Elemental semiconductors 

78.55.Bq   Liquids 

78.55.Cr   III–V semiconductors 

78.55.Et   II–VI semiconductors 

78.55.Fv   Solid alkali halides 

78.55.Hx   Other solid inorganic materials 

78.55.Kz   Solid organic materials 

78.55.Mb   Porous materials 

78.60.-b   Other luminescence and radiative recombination

78.60.Fi   Electroluminescence 

78.60.Hk   Cathodoluminescence, ionoluminescence 

78.60.Kn   Thermoluminescence 

78.60.Mq   Sonoluminescence, triboluminescence 

78.60.Ps   Chemiluminescence (see also 82.40.Tc Chemiluminescence and chemical laser kinetics)

78.66.-w   Optical properties of specific thin films (for optical properties of low-dimensional structures, see 78.67.-n; for optical properties of surfaces, see 78.68.+m)

78.66.Bz   Metals and metallic alloys 

78.66.Db   Elemental semiconductors and insulators 

78.66.Fd   III–V semiconductors 

78.66.Hf   II–VI semiconductors

78.66.Jg   Amorphous semiconductors; glasses

78.66.Li   Other semiconductors

78.66.Nk   Insulators 

78.66.Qn   Polymers; organic compounds 

78.66.Sq   Composite materials 

78.66.Tr   Fullerenes and related materials 

78.66.Vs   Fine-particle systems 

78.67.-n   Optical properties of nanoscale materials and structures

78.67.Bf   Nanocrystals and nanoparticles 

78.67.Ch   Nanotubes 

78.67.De   Quantum wells 

78.67.Hc   Quantum dots 

78.67.Lt    Quantum wires 

78.68.+m   Optical properties of surfaces

78.70.-g   Interactions of particles and radiation with matter

78.70.Bj   Positron annihilation (for positron states, see 71.60)

78.70.Ck   X-ray scattering 

78.70.Dm   X-ray absorption spectra 

78.70.En   X-ray emission spectra and fluorescence 

78.70.Gq   Microwave and radio-frequency interactions 

78.70.Nx   Neutron inelastic scattering 

78.90.+t   Other topics in optical properties, condensed matter spectroscopy and other interactions of particles and radiation with condensed matter (restricted to new topics in section 78)

79.   Electron and ion emission by liquids and solids; impact phenomena

79.20.-m   Impact phenomena (including electron spectra and sputtering)

79.20.Ap   Theory of impact phenomena; numerical simulation 

79.20.Ds   Laser-beam impact phenomena 

79.20.Fv   Electron impact: Auger emission 

79.20.Hx   Electron impact: secondary emission 

79.20.Kz   Other electron-impact emission phenomena 

79.20.La   Photon- and electron-stimulated desorption 

79.20.Mb   Positron emission 

79.20.Rf   Atomic, molecular, and ion beam impact and interactions with surfaces 

... ... ...    Electron and ion channeling, see 61.85

79.20.Uv  Electron energy loss spectroscopy (see also 82.80.Pv Electron 
                     spectroscopy in physical chemistry and chemical physics; 34.80.-i 
                     Electron scattering in atomic and molecular physics

79.40.+z   Thermionic emission

79.60.-i   Photoemission and photoelectron spectra

79.60.Bm   Clean metal, semiconductor, and insulator surfaces 

79.60.Dp   Adsorbed layers and thin films 

79.60.Fr   Polymers; organic compounds 

79.60.Ht   Disordered structures 

79.60.Jv   Interfaces; heterostructures; nanostructures 

79.70.+q   Field emission, ionization, evaporation, and desorption

79.75.+g   Exoelectron emission

79.90.+b   Other topics in electron and ion emission by liquids and solids and impact phenomena (restricted to new topics in section 79)

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