Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in
Abstract
We have examined here the intrinsic spin-orbit coupling and orbital depairing in thin films of Nb-doped $${\mathrm{SrTiO}}_{3}$$ by superconducting tunneling spectroscopy. The orbital depairing is geometrically suppressed in the two-dimensional limit, enabling a quantitative evaluation of the Fermi level spin-orbit scattering using Maki's theory. The response of the superconducting gap under in-plane magnetic fields demonstrates short spin-orbit scattering times $${{\tau}}_{\mathrm{so}}{\le}1.1\text{ }\text{ }\mathrm{ps}$$. Analysis of the orbital depairing indicates that the heavy electron band contributes significantly to pairing. These results suggest that the intrinsic spin-orbit scattering time in $${\mathrm{SrTiO}}_{3}$$ is comparable to those associated with Rashba effects in $${\mathrm{SrTiO}}_{3}$$ interfacial conducting layers and can be considered significant in all forms of superconductivity in $${\mathrm{SrTiO}}_{3}$$.
- Authors:
-
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials. Dept. of Applied Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences
- Stanford Univ., CA (United States). Dept. of Physics
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences; Stanford Univ., CA (United States). Dept. of Physics
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation (United States)
- OSTI Identifier:
- 1490400
- Alternate Identifier(s):
- OSTI ID: 1478591
- Grant/Contract Number:
- AC02-76SF00515; GBMF4415
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 121; Journal Issue: 16; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; coherence length; conductivity; density of states; electronic structure; multiband superconductivity; pseudogap; Rashba coupling; spin diffusion; spin-orbit coupling; superconducting gap; interfaces; multilayer thin films; tunnel junctions; ultrathin films
Citation Formats
Swartz, Adrian G., Cheung, Alfred K. C., Yoon, Hyeok, Chen, Zhuoyu, Hikita, Yasuyuki, Raghu, Srinivas, and Hwang, Harold Y. Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb:SrTiO3. United States: N. p., 2018.
Web. doi:10.1103/physrevlett.121.167003.
Swartz, Adrian G., Cheung, Alfred K. C., Yoon, Hyeok, Chen, Zhuoyu, Hikita, Yasuyuki, Raghu, Srinivas, & Hwang, Harold Y. Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb:SrTiO3. United States. https://doi.org/10.1103/physrevlett.121.167003
Swartz, Adrian G., Cheung, Alfred K. C., Yoon, Hyeok, Chen, Zhuoyu, Hikita, Yasuyuki, Raghu, Srinivas, and Hwang, Harold Y. Fri .
"Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb:SrTiO3". United States. https://doi.org/10.1103/physrevlett.121.167003. https://www.osti.gov/servlets/purl/1490400.
@article{osti_1490400,
title = {Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb:SrTiO3},
author = {Swartz, Adrian G. and Cheung, Alfred K. C. and Yoon, Hyeok and Chen, Zhuoyu and Hikita, Yasuyuki and Raghu, Srinivas and Hwang, Harold Y.},
abstractNote = {We have examined here the intrinsic spin-orbit coupling and orbital depairing in thin films of Nb-doped ${\mathrm{SrTiO}}_{3}$ by superconducting tunneling spectroscopy. The orbital depairing is geometrically suppressed in the two-dimensional limit, enabling a quantitative evaluation of the Fermi level spin-orbit scattering using Maki's theory. The response of the superconducting gap under in-plane magnetic fields demonstrates short spin-orbit scattering times ${{\tau}}_{\mathrm{so}}{\le}1.1\text{ }\text{ }\mathrm{ps}$. Analysis of the orbital depairing indicates that the heavy electron band contributes significantly to pairing. These results suggest that the intrinsic spin-orbit scattering time in ${\mathrm{SrTiO}}_{3}$ is comparable to those associated with Rashba effects in ${\mathrm{SrTiO}}_{3}$ interfacial conducting layers and can be considered significant in all forms of superconductivity in ${\mathrm{SrTiO}}_{3}$.},
doi = {10.1103/physrevlett.121.167003},
journal = {Physical Review Letters},
number = 16,
volume = 121,
place = {United States},
year = {Fri Oct 19 00:00:00 EDT 2018},
month = {Fri Oct 19 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Figures / Tables found in this record: