Anomalous fluctuation regimes at the FFLO transition

Abstract

Recently some experimental evidences have been obtained in favour of the existence of the inhomogeneous Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state in heavy-fermion superconductor CeCoIn_{5} and organic superconductor -(BETS)_{2}FeCl_{4}. However the unambiguous identification of FFLO state remains very difficult. We present the theoretical studies of the Gaussian fluctuations near the tricritical point (where the FFLO modulation appears) and demonstrate that the behavior of the fluctuational specific heat, paraconductivity and diamagnetism is qualitatively different from the usual superconducting transition. Special values of the critical exponent and the crossovers between different fluctuational regimes may provide a unique test for the FFLO state appearance.

arXiv comment6 pages, 2 figures. Work supported by ANR Extreme Conditions Correlated Electrons (ANR-06-BLAN-0220)

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Cited by in corpus (16)

• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Goldstone modes in Larkin-Ovchinnikov-Fulde-Ferrell superconductors
• Current-carrying states in FFLO superconductors
• FFLO state in thin superconducting films
• Critical behaviour in one dimension: unconventional pairing, phase separation, BEC-BCS crossover and magnetic Lifshitz transition
• Different types of the Fulde-Ferrell-Larkin-Ovchinnikov states induced by anisotropy effects
• Rectification and nonlinear Hall effect by fluctuating finite-momentum Cooper pairs
• Anomalous transition temperature oscillations in LOFF state
• Triplet FFLO Superconductivity in the doped Kitaev-Heisenberg Honeycomb Model
• Aharonov-Bohm effect in superconducting LOFF state
• Loop erased random walk on percolation cluster: Crossover from Euclidean to fractal geometry
• On the theory of the vortex state in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase
• Lifshitz tricritical point and its relation to the FFLO superconducting state
• Reciprocal and nonreciprocal paraconductivity in bilayer multiphase superconductors
• Oscillations of magnetization and conductivity in anisotropic Fulde-Ferrell-Larkin-Ovchinnikov superconductors
• Anisotropy and effective dimensionality crossover of the fluctuation conductivity of hybrid superconductor/ferromagnet structures