Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

10-18-2019

Journal or Book Title

Physical Review Letters

Volume

123

Issue

16

First Page

167002

DOI

10.1103/PhysRevLett.123.167002

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. These observations highlight similarities between FeSe and underdoped cuprate superconductors.

Comments

This article is published as Gati, Elena, Anna E. Böhmer, Sergey L. Bud’ko, and Paul C. Canfield. "Bulk superconductivity and role of fluctuations in the iron-based superconductor FeSe at high pressures." Physical Review Letters 123, no. 16 (2019): 167002. DOI: 10.1103/PhysRevLett.123.167002. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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