Fluctuation-Driven First-Order Transition in Pauli-limited d-wave Superconductors

Details Fluctuation-Driven First-Order Transition in Pauli-limited d-wave Superconductors Fluctuation-Driven First-Order Transition in Pauli-limited d-wave Superconductors

2004-05-27

arxiv.org/abs/cond-mat/0405654v1

Phys. Rev. Lett. 93, 247002 (2004)

Physics

Condensed Matter

Superconductivity

5 pages

Scientific paper

10.1103/PhysRevLett.93.247002

We study the phase transition between the normal and non-uniform (Fulde-Ferrell-Larkin-Ovchinnikov) superconducting state in quasi two-dimensional d-wave superconductors at finite temperature. We obtain an appropriate Ginzburg-Landau theory for this transition, in which the fluctuation spectrum of the order parameter has a set of minima at non-zero momenta. The momentum shell renormalization group procedure combined with dimensional expansion is then applied to analyze the phase structure of the theory. We find that all fixed points have more than one relevant directions, indicating the transition is of the fluctuation-driven first order type for this universality class.

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