Zero Crossing Steps and Anomalous Shapiro Maps in Graphene Josephson Junctions
Abstract
The AC Josephson effect manifests itself in the form of “Shapiro steps” of quantized voltage in Josephson junctions subject to radio frequency (RF) radiation. This effect presents an early example of a driven–dissipative quantum phenomenon and is presently utilized in primary voltage standards. Shapiro steps have also become one of the standard tools to probe junctions made in a variety of novel materials. Here we study Shapiro steps in a widely tunable graphene-based Josephson junction in which the high- frequency dynamics is determined by the on-chip environment. We investigate the variety of patterns that can be obtained in this well-understood system depending on the carrier density, temperature, RF frequency, and magnetic field. Although the patterns of Shapiro steps can change drastically when just one parameter is varied, the overall trends can be understood and the behaviors straightforwardly simulated, showing some key differences from the conventional RCSJ model. The resulting understanding may help interpret similar measurements in more complex materials.
- Authors:
-
[1];
[1];
[3];
[3];
- Duke Univ., Durham, NC (United States)
- Appalachian State Univ., Boone, NC (United States)
- National Inst. for Materials Science, Tsukuba (Japan)
- Publication Date:
- Research Org.:
- Duke Univ., Durham, NC (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
- OSTI Identifier:
- 1736009
- Grant/Contract Number:
- SC0002765; ECCS-1542015
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 20; Journal Issue: 10; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AC Josephson Effect; Shapiro Steps; Topological Materials; Superconductivity; Driven−Dissipative Systems; Magnetic properties; Power; Hysteresis; Materials; Two dimensional materials
Citation Formats
Larson, Trevyn F. Q., Zhao, Lingfei, Arnault, Ethan G., Wei, Ming-Tso, Seredinski, Andrew, Li, Henming, Watanabe, Kenji, Taniguchi, Takashi, Amet, François, and Finkelstein, Gleb. Zero Crossing Steps and Anomalous Shapiro Maps in Graphene Josephson Junctions. United States: N. p., 2020.
Web. doi:10.1021/acs.nanolett.0c01598.
Larson, Trevyn F. Q., Zhao, Lingfei, Arnault, Ethan G., Wei, Ming-Tso, Seredinski, Andrew, Li, Henming, Watanabe, Kenji, Taniguchi, Takashi, Amet, François, & Finkelstein, Gleb. Zero Crossing Steps and Anomalous Shapiro Maps in Graphene Josephson Junctions. United States. https://doi.org/10.1021/acs.nanolett.0c01598
Larson, Trevyn F. Q., Zhao, Lingfei, Arnault, Ethan G., Wei, Ming-Tso, Seredinski, Andrew, Li, Henming, Watanabe, Kenji, Taniguchi, Takashi, Amet, François, and Finkelstein, Gleb. Wed .
"Zero Crossing Steps and Anomalous Shapiro Maps in Graphene Josephson Junctions". United States. https://doi.org/10.1021/acs.nanolett.0c01598. https://www.osti.gov/servlets/purl/1736009.
@article{osti_1736009,
title = {Zero Crossing Steps and Anomalous Shapiro Maps in Graphene Josephson Junctions},
author = {Larson, Trevyn F. Q. and Zhao, Lingfei and Arnault, Ethan G. and Wei, Ming-Tso and Seredinski, Andrew and Li, Henming and Watanabe, Kenji and Taniguchi, Takashi and Amet, François and Finkelstein, Gleb},
abstractNote = {The AC Josephson effect manifests itself in the form of “Shapiro steps” of quantized voltage in Josephson junctions subject to radio frequency (RF) radiation. This effect presents an early example of a driven–dissipative quantum phenomenon and is presently utilized in primary voltage standards. Shapiro steps have also become one of the standard tools to probe junctions made in a variety of novel materials. Here we study Shapiro steps in a widely tunable graphene-based Josephson junction in which the high- frequency dynamics is determined by the on-chip environment. We investigate the variety of patterns that can be obtained in this well-understood system depending on the carrier density, temperature, RF frequency, and magnetic field. Although the patterns of Shapiro steps can change drastically when just one parameter is varied, the overall trends can be understood and the behaviors straightforwardly simulated, showing some key differences from the conventional RCSJ model. The resulting understanding may help interpret similar measurements in more complex materials.},
doi = {10.1021/acs.nanolett.0c01598},
journal = {Nano Letters},
number = 10,
volume = 20,
place = {United States},
year = {Wed Sep 09 00:00:00 EDT 2020},
month = {Wed Sep 09 00:00:00 EDT 2020}
}
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