Angular dependence of antiferromagnetic order induced by paramagnetism in d-wave superconductor

Abstract

Antiferromagnetic (AFM) order and a spatial order peculiar to Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states, previously indicated in the quasi two-dimensional d-wave superconductors CeCoIn_5 with strong paramagnetic pair breaking (PPB) in a magnetic-field parallel to the basal plane, are considered in the field configurations tilted from the basal plane within an approach assuming that the wavelength of the FFLO modulation is relatively long. It is demonstrated that, with increasing the tilt angle, both the AFM and FFLO orders are gradually suppressed, and that disappearance of the AFM order in zero temperature limit occurs at a lower angle than that of the FFLO state. Consequently, a nonmagnetic FFLO-ordered high field SC phase is realized in an intermediate range of the tilt angle even at low enough temperatures. As the perpendicular field configuration ($\mathbf{H}\parallel c$) is approached by the field-tilt, the AFM order in real space is found close to the FFLO nodal planes in contrast to the high field behavior in $\mathbf{H}\perp c$ case. Further, in the field v.s. temperature (H-T) phase diagram, the AFM order reduces, at a higher angle, to an AFM quantum critical point (QCP) lying at a lower field than H_{c2}(0) as a consequence of competition between the field dependences of the nesting condition and of PPB. These features of the AFM order and the resulting H-T phase diagram strikingly coincide with those seen in a recent NMR measurement on CeCoIn_5 in tilted field configurations.

18 pages, 4 figures

References in corpus (12)

• Fulde-Ferrell-Larkin-Ovchinnikov state in a perpendicular field of quasi two-dimensional CeCoIn5
• Evolution of Paramagnetic Quasiparticle Excitations Emerged in the High-Field Superconducting Phase of CeCoIn5
• Anisotropic effect of Cd and Hg doping on Pauli limited superconductor CeCoIn${}_5$
• Antiferromagnetic Order in Pauli Limited Unconventional Superconductors
• Exploring the fragile antiferromagnetic superconducting phase in CeCoIn5
• Inherent spin density wave instability by vortices in superconductors with strong Pauli effects
• Vortex tilt modulus in Fulde-Ferrell-Larkin-Ovchinnikov state
• High field superconducting phase diagrams including Fulde-Ferrell-Larkin-Ovchinnikov vortex states
• Emergent Antiferromagnetism in D-wave Superconductor with Strong Paramagnetic Pair-Breaking
• Instability of square vortex lattice in d-wave superconductors is due to paramagnetic depairing
• Anomalous doping effect on the superconducting state in CeCoIn${}_5$ at high magnetic fields
• Fluctuation and Order of Antiferromagnetism induced by Paramagnetic Pair-Breaking in Superconducting Vortex Lattice

Cited by in corpus (2)

• Antiferromagnetic Order oriented by Fulde-Ferrell-Larkin-Ovchinnikov Superconducting Order
• Possible Triplet Superconducting Order in Magnetic Superconducting Phase induced by Paramagnetic Pair-Breaking