Strong-coupling approach to antiferromagnetic ordering driven by paramagnetic pair-breaking in d-wave superconducting phase

Abstract

The field-induced antiferromagnetic (AFM) ordering in the $d_{x^2-y^2}$-paired superconducting phase, which has been recently found in the weak-coupling approach as a basic mechanism due to the Pauli paramagnetic pair-breaking (PPB) in relation to the high-field behaviors in CeCoIn_5, is studied in the strong-coupling approach taking account of the electron correlation. Applying the fluctuation-exchange (FLEX) approximation to the two-dimensional Hubbard model including the Zeeman term, it is shown that the PPB-induced AFM ordering in the superconducting (SC) phase and the first order SC transition on H_{c2}(T) are realized in the strong-coupling approach as well as those in the weak-coupling model, and that the AFM ordering is affected by the quasiparticle renormalization and the amplitude of the SC order parameter. This AFM ordering may appear in a wide range of materials close to an AFM quantum critical point (QCP).

24 pages, 9 figures, revisions are made mainly in section 6, title is changed slightly

References in corpus (4)

• Hidden Magnetism and Quantum Criticality in the Heavy Fermion Superconductor CeRhIn5
• Pauli-Limited Multiband Superconductivity in KFe2As2
• Towards the identification of a quantum critical line in the (p, B) phase diagram of CeCoIn5
• Anisotropic effect of Cd and Hg doping on Pauli limited superconductor CeCoIn${}_5$

Cited by in corpus (1)

• Coupled k-space structure of $d$-wave superconducting and magnetic orders induced by paramagnetic pair-breaking effect