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Title: Angle-dependent evolution of the Fulde-Ferrell-Larkin-Ovchinnikov state in an organic superconductor.

Abstract

We report magnetic-field and angular-dependent high-resolution specific-heat measurements of the organic superconductor {beta}{double_prime}-(BEDT-TTF){sub 2}SF{sub 5}CH{sub 2}CF{sub 2}SO{sub 3}. When the magnetic field is aligned precisely within the conducting BEDT-TTF layer, at low temperatures a clear upturn of the upper critical field beyond the Pauli limit of 9.73 T is observed, hinting at the emergence of a Fulde-Ferrell-Larkin-Ovchinnikov state. This upturn disappears when the field is oriented out of plane by more than {approx}0.5 deg. For smaller out-of-plane angles, the specific-heat anomaly at T{sub c} sharpens and a second peaky phase transition appears within the superconducting state.

Authors:
; ; ;  [1]
  1. Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1050181
Report Number(s):
ANL/MSD/JA-72661
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US201218%%534
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 2; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; BEDT-TTF; CRITICAL FIELD; MAGNETIC FIELDS; ORGANIC SUPERCONDUCTORS; SPECIFIC HEAT

Citation Formats

Beyer, R, Bergk, B, Schlueter, J A, Wosnitza, J, and Hochfeld-Magnetlabor Dresden). Angle-dependent evolution of the Fulde-Ferrell-Larkin-Ovchinnikov state in an organic superconductor.. United States: N. p., 2012. Web. doi:10.1103/PhysRevLett.109.027003.
Beyer, R, Bergk, B, Schlueter, J A, Wosnitza, J, & Hochfeld-Magnetlabor Dresden). Angle-dependent evolution of the Fulde-Ferrell-Larkin-Ovchinnikov state in an organic superconductor.. United States. https://doi.org/10.1103/PhysRevLett.109.027003
Beyer, R, Bergk, B, Schlueter, J A, Wosnitza, J, and Hochfeld-Magnetlabor Dresden). 2012. "Angle-dependent evolution of the Fulde-Ferrell-Larkin-Ovchinnikov state in an organic superconductor.". United States. https://doi.org/10.1103/PhysRevLett.109.027003.
@article{osti_1050181,
title = {Angle-dependent evolution of the Fulde-Ferrell-Larkin-Ovchinnikov state in an organic superconductor.},
author = {Beyer, R and Bergk, B and Schlueter, J A and Wosnitza, J and Hochfeld-Magnetlabor Dresden)},
abstractNote = {We report magnetic-field and angular-dependent high-resolution specific-heat measurements of the organic superconductor {beta}{double_prime}-(BEDT-TTF){sub 2}SF{sub 5}CH{sub 2}CF{sub 2}SO{sub 3}. When the magnetic field is aligned precisely within the conducting BEDT-TTF layer, at low temperatures a clear upturn of the upper critical field beyond the Pauli limit of 9.73 T is observed, hinting at the emergence of a Fulde-Ferrell-Larkin-Ovchinnikov state. This upturn disappears when the field is oriented out of plane by more than {approx}0.5 deg. For smaller out-of-plane angles, the specific-heat anomaly at T{sub c} sharpens and a second peaky phase transition appears within the superconducting state.},
doi = {10.1103/PhysRevLett.109.027003},
url = {https://www.osti.gov/biblio/1050181}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 2,
volume = 109,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2012},
month = {Sun Jan 01 00:00:00 EST 2012}
}