Superconductors

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Interview with Dale Van Harlingen, Professor of Physics at the University of Illinois, Urbana-Champaign. He recounts his childhood in Ohio and his undergraduate education at OSU in physics and his early work on SQUIDS. Van Harlingen discusses his mentor Jim Garland, and he explains his decision to stay at OSU for graduate school to develop SQUID devices to make phase-sensitive measurements. He explains the opportunities that gained him a postdoctoral appointment at the Cavendish Laboratory in Cambridge where he developed his expertise in the Josephson Effect, and where he met John Clarke, who offered him a subsequent postdoctoral position at UC Berkeley. Van Harlingen describes his foray using SQUIDS to push the quantum limit, and he explains his decision to join the faculty at Illinois, where he was impressed both with the quality of the research and how nice everyone was. He describes joining the Materials Research Laboratory and the development of the Micro and Nanotechnology Laboratory, and he conveys his admiration for Tony Leggett. Van Harlingen discusses his research in NMR microscopy, grain boundary junctions, scanning tunneling microscopy, vortex configurations, and he describes his current interest in unconventional superconductors. At the end of the interview, Van Harlingen conveys his excitement about the national quantum initiative as a major collaboration between universities and National Labs, and he explains his motivation to understand if Majorana fermions actually exist.

Interview with John Spence, Richard Snell Professor of Physics at Arizona State University. Spence discusses his dual role as a Director of Science at NSF and his focus on research at the intersection of biology and physics. He recounts his childhood in Australia and his undergraduate education at Queensland University. Spence describes his graduate research on plasmons at Melbourne and the opportunities that led to his postdoctoral appointment at Oxford, where he worked with Mike Whelan and David Cockayne on quantifying atom arrangements in solids. He describes his decision to join the faculty at Arizona State, and the nascent field of high-resolution electron microscopy, which compelled him to write a book on the topic. Spence discusses his work on the structure of defects in superconductors and his collaborations with Bell Labs, and he explains the significance of the LCLS to his research. He describes the BioXFEL project, his work as part of the broader community of crystallographers, and the intellectual origins of the book "Lightspeed". At the end of the interview, Spence credits Michael Crow for bringing ASU to the forefront of so much innovation in science, and he reflects on how physics has never failed to surprise him.