Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-09-10
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures
Scientific paper
The first observation of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state and a subsequent detection of the spin-dependent effective masses of quasiparticles in the CeCoIn_5 heavy fermion system are combined into a single theoretical framework. The appearance of the spin-split masses extends essentially the regime of temperatures and applied magnetic fields, in which FFLO is observable and thus is claimed to be very important for the FFLO detectability. We also stress that the quasiparticles composing Cooper pair become distinguishable in the nonzero field. The analysis is performed within the Kondo-lattice limit of the finite-U Anderson-lattice model containing both the mass renormalization and real-space pairing within a single scheme.
Kaczmarczyk Jan
Maska Maciej M.
Mierzejewski Marcin
Spalek Jozef
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