Universal Bound to the Amplitude of the Vortex Nernst Signal in Superconductors
Abstract
A liquid of superconducting vortices generates a transverse thermoelectric response. This Nernst signal has a tail deep in the normal state due to superconducting fluctuations. Here, we present a study of the Nernst effect in two-dimensional heterostructures of Nb-doped strontium titanate (STO) and in amorphous MoGe. Additionally, the Nernst signal generated by ephemeral Cooper pairs above the critical temperature has the magnitude expected by theory in STO. On the other hand, the peak amplitude of the vortex Nernst signal below Tc is comparable in both and in numerous other superconductors despite the large distribution of the critical temperature and the critical magnetic fields. In four superconductors belonging to different families, the maximum Nernst signal corresponds to an entropy per vortex per layer of ≈kBln2.
- Authors:
-
- PSL Research Univ., Paris (France). Lab. de Physique et d'Etude des Materiaux; Univ. of Geneva (Switzerland)
- PSL Research Univ., Paris (France). Lab. de Physique et d'Etude des Materiaux; Hangzhou Normal Univ. (China). Hangzhou Key Lab. of Quantum Matter
- PSL Research Univ., Paris (France). JEIP
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; Max Planck Inst. for Solid State Research, Stuttgart (Germany)
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials; Univ. of Bristol (United Kingdom). H. H. Wills Physics Lab.
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
- PSL Research Univ., Paris (France). Lab. de Physique et d'Etude des Materiaux
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Research Agency (ANR); National Science Foundation (NSF)
- OSTI Identifier:
- 1777281
- Grant/Contract Number:
- ANR-19-CE30-0014-04; ANR-18-CE92-0020-01; AC02-76SF00515; NSF-DMR-1808385
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 126; Journal Issue: 7; 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; Nernst effect; vortices in superconductors
Citation Formats
Rischau, Carl Willem, Li, Yuke, Fauqué, Benoît, Inoue, Hisashi, Kim, Minu, Bell, Christopher, Hwang, Harold Y., Kapitulnik, Aharon, and Behnia, Kamran. Universal Bound to the Amplitude of the Vortex Nernst Signal in Superconductors. United States: N. p., 2021.
Web. doi:10.1103/physrevlett.126.077001.
Rischau, Carl Willem, Li, Yuke, Fauqué, Benoît, Inoue, Hisashi, Kim, Minu, Bell, Christopher, Hwang, Harold Y., Kapitulnik, Aharon, & Behnia, Kamran. Universal Bound to the Amplitude of the Vortex Nernst Signal in Superconductors. United States. https://doi.org/10.1103/physrevlett.126.077001
Rischau, Carl Willem, Li, Yuke, Fauqué, Benoît, Inoue, Hisashi, Kim, Minu, Bell, Christopher, Hwang, Harold Y., Kapitulnik, Aharon, and Behnia, Kamran. Tue .
"Universal Bound to the Amplitude of the Vortex Nernst Signal in Superconductors". United States. https://doi.org/10.1103/physrevlett.126.077001. https://www.osti.gov/servlets/purl/1777281.
@article{osti_1777281,
title = {Universal Bound to the Amplitude of the Vortex Nernst Signal in Superconductors},
author = {Rischau, Carl Willem and Li, Yuke and Fauqué, Benoît and Inoue, Hisashi and Kim, Minu and Bell, Christopher and Hwang, Harold Y. and Kapitulnik, Aharon and Behnia, Kamran},
abstractNote = {A liquid of superconducting vortices generates a transverse thermoelectric response. This Nernst signal has a tail deep in the normal state due to superconducting fluctuations. Here, we present a study of the Nernst effect in two-dimensional heterostructures of Nb-doped strontium titanate (STO) and in amorphous MoGe. Additionally, the Nernst signal generated by ephemeral Cooper pairs above the critical temperature has the magnitude expected by theory in STO. On the other hand, the peak amplitude of the vortex Nernst signal below Tc is comparable in both and in numerous other superconductors despite the large distribution of the critical temperature and the critical magnetic fields. In four superconductors belonging to different families, the maximum Nernst signal corresponds to an entropy per vortex per layer of ≈kBln2.},
doi = {10.1103/physrevlett.126.077001},
journal = {Physical Review Letters},
number = 7,
volume = 126,
place = {United States},
year = {Tue Feb 16 00:00:00 EST 2021},
month = {Tue Feb 16 00:00:00 EST 2021}
}
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