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Title: Bulk Superconductivity and Role of Fluctuations in the Iron-Based Superconductor FeSe at High Pressures

Abstract

The iron-based superconductor FeSe offers a unique possibility to study the interplay of superconductivity with purely nematic as well magnetic-nematic order by pressure (p) tuning. By measuring specific heat under p up to 2.36 GPa, we study the multiple phases in FeSe using a thermodynamic probe. We conclude that superconductivity is bulk across the entire p range and competes with magnetism. In addition, whenever magnetism is present, fluctuations exist over a wide temperature range above both the bulk superconducting and the magnetic transitions. Whereas the magnetic fluctuations are likely temporal, the superconducting fluctuations may be either temporal or spatial. Finally, these observations highlight similarities between FeSe and underdoped cuprate superconductors.

Authors:
 [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1570451
Report Number(s):
IS-J-10030
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; 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

Citation Formats

Gati, Elena, Böhmer, Anna E., Bud’ko, Sergey L., and Canfield, Paul C. Bulk Superconductivity and Role of Fluctuations in the Iron-Based Superconductor FeSe at High Pressures. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.123.167002.
Gati, Elena, Böhmer, Anna E., Bud’ko, Sergey L., & Canfield, Paul C. Bulk Superconductivity and Role of Fluctuations in the Iron-Based Superconductor FeSe at High Pressures. United States. doi:10.1103/PhysRevLett.123.167002.
Gati, Elena, Böhmer, Anna E., Bud’ko, Sergey L., and Canfield, Paul C. Wed . "Bulk Superconductivity and Role of Fluctuations in the Iron-Based Superconductor FeSe at High Pressures". United States. doi:10.1103/PhysRevLett.123.167002.
@article{osti_1570451,
title = {Bulk Superconductivity and Role of Fluctuations in the Iron-Based Superconductor FeSe at High Pressures},
author = {Gati, Elena and Böhmer, Anna E. and Bud’ko, Sergey L. and Canfield, Paul C.},
abstractNote = {The iron-based superconductor FeSe offers a unique possibility to study the interplay of superconductivity with purely nematic as well magnetic-nematic order by pressure (p) tuning. By measuring specific heat under p up to 2.36 GPa, we study the multiple phases in FeSe using a thermodynamic probe. We conclude that superconductivity is bulk across the entire p range and competes with magnetism. In addition, whenever magnetism is present, fluctuations exist over a wide temperature range above both the bulk superconducting and the magnetic transitions. Whereas the magnetic fluctuations are likely temporal, the superconducting fluctuations may be either temporal or spatial. Finally, these observations highlight similarities between FeSe and underdoped cuprate superconductors.},
doi = {10.1103/PhysRevLett.123.167002},
journal = {Physical Review Letters},
number = 16,
volume = 123,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
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