Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session V05: Pairing in the Most Dilute Superconductor
2:30 PM–5:30 PM,
Thursday, March 8, 2018
LACC Room: 152
Sponsoring Unit: DCMP
Chair: Harold Hwang, Stanford Univ
Abstract: V05.00002 : Insights on dilute superconductivity in SrTiO3 from electron tunneling spectroscopy
3:06 PM–3:42 PM
The origin of superconductivity in the oxide semiconductor SrTiO3 has remained an open question for more than 50 years. Tunneling spectroscopy, which directly probes the electronic structure of the material, is a powerful technique to study superconductivity and pairing interactions. We have developed an approach using atomically designed interfaces to realize high-quality tunneling junctions, enabling the first high-resolution examination of the systematic carrier density evolution of the intrinsic electronic structure in SrTiO3. I will discuss our experimental results examining the strength of the electron-phonon coupling, the structure of the superconducting gap, and the role of intrinsic spin-orbit coupling. These results provide insight on the nature of the highly mobile polaronic carriers and the superconducting condensate which they form.
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