Upper critical field in the organic superconductor β″ - (H2 CF2 SO3: Possibility of Fulde-Ferrell-Larkin-Ovchinnikov state

Authors

K. Cho, Clark University
B. E. Smith, Clark University
W. A. Coniglio, Clark University
L. E. Winter, Clark University
C. C. Agosta, Clark UniversityFollow
J. A. Schlueter, Argonne National Laboratory

Document Type

Article

Abstract

We report upper critical-field measurements in the metal-free-all-organic superconductor β″ - (ET) 2 SF5 CH2 CF2 SO3 obtained from measuring the in-plane penetration depth using the tunnel diode oscillator technique. For magnetic field applied parallel to the conducting planes the low-temperature upper critical fields are found to exceed the Pauli limiting field calculated by using a semiempirical method. Furthermore, we found a signature that could be the phase transition between the superconducting vortex state and the Fulde-Ferrell-Larkin-Ovchinnikov state in the form of a kink just below the upper critical field and only at temperatures below 1.23 K. © 2009 The American Physical Society.

Publication Title

Physical Review B - Condensed Matter and Materials Physics

Publication Date

6-18-2009

Volume

79

Issue

22

ISSN

1098-0121

DOI

10.1103/PhysRevB.79.220507

Keywords

magnetic fields, superconductivity

Repository Citation

Cho, K.; Smith, B. E.; Coniglio, W. A.; Winter, L. E.; Agosta, C. C.; and Schlueter, J. A., "Upper critical field in the organic superconductor β″ - (H2 CF2 SO3: Possibility of Fulde-Ferrell-Larkin-Ovchinnikov state" (2009). Physics. 27.
https://commons.clarku.edu/faculty_physics/27

Cross Post Location

Student Publications