Theoretical Description of Nearly Discontinuous Transition in Superconductors with Paramagnetic Depairing

Abstract

Based on a theoretical argument and Monte Carlo simulations of a Ginzburg-Landau model derived microscopically, it is argued that, in type-II superconductors where {\it both} the paramagnetic {\it and} orbital depairings are important, a strong first-order transition (FOT) at $H_{c2}$ expected in the mean field (MF) approximation never occurs in real systems and changes due to the fluctuation into a crossover. The present result explains why a {\it nearly} discontinuous crossover at $H_{c2}$ with {\it no} intrinsic hysteresis is observed only in a clean superconducting material with a singlet pairing and a high condensation energy such as CeCoIn${}_5$.

Publication version. See cond-mat/0306060 regarding a corresponding long paper

References in corpus (5)

• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
• First order superconducting phase transition in CeCoIn${}_5$
• Closing the Pseudogap by Zeeman Splitting in Bi_2Sr_2CaCu_2O_8+y at High Magnetic Fields
• Anomalous Superconducting Properties and Field Induced Magnetism in CeCoIn5
• Electrical transport, magnetic, and structural properties of the vortex lattice of V_3Si in the vicinity of the peak effect

Cited by in corpus (2)

• Effects of Pauli paramagnetism on superconducting vortex phase diagram in strong fields
• Field-induced coupled superconductivity and spin density wave order in the Heavy Fermion compound CeCoIn5