Quantum phase transition in the Fulde-Ferrell-Larkin-Ovchinnikov states of a two dimensional d-wave superconductor upon increasing the exchange field

Details Quantum phase transition in the Fulde-Ferrell-Larkin-Ovchinnikov states of a two dimensional d-wave superconductor upon increasing the exchange field Quantum phase transition in the Fulde-Ferrell-Larkin-Ovchinnikov states of a two dimensional d-wave superconductor upon increasing the exchange field

2009-06-12

arxiv.org/abs/0906.2246v1

Phys. Rev. B 80, 224515 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.80.224515

We studied the phase diagram for a two-dimensional d-wave superconducting system under an in-plane magnetic field or an exchange field. According to the spatial configuration of the order parameter, we show that there exists quantum phase transitions in which the uniform phase transforms to the one-dimensional Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, and then to two-dimensional FFLO state upon increasing the exchange field. The local density of states are calculated and suggested to be signatures to distinguish these phases.

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