Giant superconducting fluctuations in the compensated semimetal FeSe at the BCS–BEC crossover

S. Kasahara; T. Yamashita; A. Shi; R. Kobayashi; Y. Shimoyama; T. Watashige; K. Ishida; T. Terashima; T. Wolf; F. Hardy; C. Meingast; H. v. Löhneysen; A. Levchenko; T. Shibauchi; Y. Matsuda

doi:10.1038/ncomms12843

Nature Communications (Sep 2016)

Giant superconducting fluctuations in the compensated semimetal FeSe at the BCS–BEC crossover

S. Kasahara,
T. Yamashita,
A. Shi,
R. Kobayashi,
Y. Shimoyama,
T. Watashige,
K. Ishida,
T. Terashima,
T. Wolf,
F. Hardy,
C. Meingast,
H. v. Löhneysen,
A. Levchenko,
T. Shibauchi,
Y. Matsuda

Affiliations

S. Kasahara: Department of Physics, Kyoto University
T. Yamashita: Department of Physics, Kyoto University
A. Shi: Department of Physics, Kyoto University
R. Kobayashi: Research Center for Low Temperature and Materials Sciences, Kyoto University
Y. Shimoyama: Department of Physics, Kyoto University
T. Watashige: Department of Physics, Kyoto University
K. Ishida: Department of Physics, Kyoto University
T. Terashima: Research Center for Low Temperature and Materials Sciences, Kyoto University
T. Wolf: Institute of Solid State Physics, Karlsruhe Institute of Technology
F. Hardy: Institute of Solid State Physics, Karlsruhe Institute of Technology
C. Meingast: Institute of Solid State Physics, Karlsruhe Institute of Technology
H. v. Löhneysen: Institute of Solid State Physics, Karlsruhe Institute of Technology
A. Levchenko: Department of Physics, University of Wisconsin-Madison
T. Shibauchi: Department of Advanced Materials Science, University of Tokyo
Y. Matsuda: Department of Physics, Kyoto University

DOI: https://doi.org/10.1038/ncomms12843
Journal volume & issue: Vol. 7, no. 1
pp. 1 – 7

Abstract

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The crossover between the weak-coupling limit and strong-coupling limit provides important information for quantum bound states of interacting fermions. Here, Kasahara et al. report thermodynamic evidence for prevailing phase fluctuations of superconductivity, highlighting unusual normal state in the BCS-BEC crossover regime.

Published in Nature Communications

ISSN: 2041-1723 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Science
Website: https://www.nature.com/ncomms/

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