New Superconducting Phases in Field-Induced Organic Superconductor λ−(BETS)2FeCl4
M. Houzet, A. Buzdin, L. Bulaevskii, M. Maley
DOI 10.1103/PhysRevLett.88.227001 · Physical Review Letters
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Abstract
We derive the parallel upper critical field, Hc2, as a function of the temperature T in quasi-2D organic compound λ−(BETS)2FeCl4, accounting for the formation of the nonuniform Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) state. To further check the 2D LOFF model, we propose to study the Hc2(T) curve at low T in tilted fields, where the vortex state is described by the high Landau level functions characterized by the index n. We predict a cascade of first-order transitions between vortex phases with different n, between phases with different types of the symmetry at given n and the change of the superconducting transition from the second order to the first order as FeCl4 ions are replaced partly by GaCl4 ions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| λ-(BETS)2FeCl4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | Pressure not reported | onset |
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