Finite momentum Cooper pairing in three-dimensional topological insulator Josephson junctions
Abstract
Abstract Unconventional superconductivity arising from the interplay between strong spin–orbit coupling and magnetism is an intensive area of research. One form of unconventional superconductivity arises when Cooper pairs subjected to a magnetic exchange coupling acquire a finite momentum. Here, we report on a signature of finite momentum Cooper pairing in the three-dimensional topological insulator Bi 2 Se 3 . We apply in-plane and out-of-plane magnetic fields to proximity-coupled Bi 2 Se 3 and find that the in-plane field creates a spatially oscillating superconducting order parameter in the junction as evidenced by the emergence of an anomalous Fraunhofer pattern. We describe how the anomalous Fraunhofer patterns evolve for different device parameters, and we use this to understand the microscopic origin of the oscillating order parameter. The agreement between the experimental data and simulations shows that the finite momentum pairing originates from the coexistence of the Zeeman effect and Aharonov–Bohm flux.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1465880
- Alternate Identifier(s):
- OSTI ID: 1511469
- Grant/Contract Number:
- SC0012368
- Resource Type:
- Published Article
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Name: Nature Communications Journal Volume: 9 Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Chen, Angela Q., Park, Moon Jip, Gill, Stephen T., Xiao, Yiran, Reig-i-Plessis, Dalmau, MacDougall, Gregory J., Gilbert, Matthew J., and Mason, Nadya. Finite momentum Cooper pairing in three-dimensional topological insulator Josephson junctions. United Kingdom: N. p., 2018.
Web. doi:10.1038/s41467-018-05993-w.
Chen, Angela Q., Park, Moon Jip, Gill, Stephen T., Xiao, Yiran, Reig-i-Plessis, Dalmau, MacDougall, Gregory J., Gilbert, Matthew J., & Mason, Nadya. Finite momentum Cooper pairing in three-dimensional topological insulator Josephson junctions. United Kingdom. https://doi.org/10.1038/s41467-018-05993-w
Chen, Angela Q., Park, Moon Jip, Gill, Stephen T., Xiao, Yiran, Reig-i-Plessis, Dalmau, MacDougall, Gregory J., Gilbert, Matthew J., and Mason, Nadya. Tue .
"Finite momentum Cooper pairing in three-dimensional topological insulator Josephson junctions". United Kingdom. https://doi.org/10.1038/s41467-018-05993-w.
@article{osti_1465880,
title = {Finite momentum Cooper pairing in three-dimensional topological insulator Josephson junctions},
author = {Chen, Angela Q. and Park, Moon Jip and Gill, Stephen T. and Xiao, Yiran and Reig-i-Plessis, Dalmau and MacDougall, Gregory J. and Gilbert, Matthew J. and Mason, Nadya},
abstractNote = {Abstract Unconventional superconductivity arising from the interplay between strong spin–orbit coupling and magnetism is an intensive area of research. One form of unconventional superconductivity arises when Cooper pairs subjected to a magnetic exchange coupling acquire a finite momentum. Here, we report on a signature of finite momentum Cooper pairing in the three-dimensional topological insulator Bi 2 Se 3 . We apply in-plane and out-of-plane magnetic fields to proximity-coupled Bi 2 Se 3 and find that the in-plane field creates a spatially oscillating superconducting order parameter in the junction as evidenced by the emergence of an anomalous Fraunhofer pattern. We describe how the anomalous Fraunhofer patterns evolve for different device parameters, and we use this to understand the microscopic origin of the oscillating order parameter. The agreement between the experimental data and simulations shows that the finite momentum pairing originates from the coexistence of the Zeeman effect and Aharonov–Bohm flux.},
doi = {10.1038/s41467-018-05993-w},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United Kingdom},
year = {Tue Aug 28 00:00:00 EDT 2018},
month = {Tue Aug 28 00:00:00 EDT 2018}
}
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