Calorimetric Evidence for a Fulde-Ferrell-Larkin-Ovchinnikov Superconducting State in the Layered Organic Superconductor κ−(BEDT−TTF)2Cu(NCS)2
R. Lortz, Y. Wang, A. Demuer, P. H. M. Böttger, B. Bergk, G. Zwicknagl, Y. Nakazawa, J. Wosnitza
DOI 10.1103/PhysRevLett.99.187002 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The specific heat of the layered organic superconductor κ−(BEDT−TTF)2Cu(NCS)2, where BEDT-TTF is bisethylenedithio-tetrathiafulvalene, has been studied in magnetic fields up to 28 T applied perpendicular and parallel to the superconducting layers. In parallel fields above 21 T, the superconducting transition becomes first order, which signals that the Pauli-limiting field is reached. Instead of saturating at this field value, the upper-critical-field increases sharply and a second first-order transition line appears within the superconducting phase. Our results give strong evidence that the phase, which separates the homogeneous superconducting state from the normal state is a realization of a Fulde-Ferrell-Larkin-Ovchinnikov state.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| κ-(BEDT-TTF)2Cu(NCS)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.1 | Pressure not reported | onset |
Similar papers
In-Plane Magnetic Field Anisotropy of the Fulde-Ferrell-Larkin-Ovchinnikov State in Layered Superconductors
similarity 0.96M. D. Croitoru et al.
Source status unknown — claims are unverified
High-resolution ac-calorimetry studies of the quasi-two-dimensional organic superconductor κ−(BEDT−TTF)2Cu(NCS)2
similarity 0.96J. Müller et al.
Source status unknown — claims are unverified
Magnetic torque evidence for the Fulde-Ferrell-Larkin-Ovchinnikov state in the layered organic superconductor κ−(BEDT−TTF)2Cu(NCS)2
similarity 0.96B. Bergk et al.
Source status unknown — claims are unverified
The Fulde-Ferrell-Larkin-Ovchinnikov State in the Organic Superconductor k-(BEDT-TTF)2Cu(NCS)2 as Observed in Magnetic Torque Experiments
similarity 0.95B. Bergk et al. · 2009 · arXiv:0907.3769
Source status unknown — claims are unverified
Calorimetric Measurements of Magnetic-Field-Induced Inhomogeneous Superconductivity Above the Paramagnetic Limit
similarity 0.95Charles C. Agosta et al.
Source status unknown — claims are unverified
Experimental and semiempirical method to determine the Pauli-limiting field in quasi-two-dimensional superconductors as applied to κ-(BEDT-TTF)2Cu(NCS)2: Strong evidence of a FFLO state
similarity 0.95C. C. Agosta et al.
Source status unknown — claims are unverified