Field Evolution of the Fulde-Ferrell-Larkin-Ovchinnikov State in a Superconductor with Strong Pauli Effects
Kenta M. Suzuki, Yasumasa Tsutsumi, Noriyuki Nakai, Masanori Ichioka,, and Kazushige Machida
TL;DR
This study uses self-consistent Eilenberger theory to analyze the FFLO phase in 3D superconductors with strong Pauli effects, providing phase diagrams and experimental signatures relevant to materials like CeCoIn5.
Contribution
It offers a detailed theoretical analysis of the FFLO state in 3D superconductors, including phase diagrams and experimental observables, which advances understanding of this exotic phase.
Findings
Phase diagram of FFLO state in H-T plane
Field evolution of NMR spectra in FFLO state
Flux line lattice form factors in neutron scattering
Abstract
The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase in the vortex lattice state is quantitatively studied using the selfconsistent Eilenberger theory in three-dimensional (3D) space. We estimate free energy to determine the FFLO phase diagram in the H-T plane and stable FFLO wave number in the isotropic system with the 3D Fermi sphere and s-wave pairing. To facilitate the experimental identification of the FFLO state, we investigate the field evolution of NMR spectra and flux line lattice form factors obtained in neutron scattering in the FFLO vortex states. Possible applications of our results to experimental data on CeCoIn5 are mentioned.
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