Structure of magnetic order in Pauli limited unconventional superconductors

Abstract

We analyse the magnetic structure of the antiferromagnetic order induced in Pauli limited d-wave superconductors by Zeeman coupling to magnetic field. We determine the phase diagram in the H-T plane, and find that the magnetic phase, which is stabilized at low temperatures and just below the upper critical field, can have two realizations depending primarily on the shape of the underlying Fermi surface. The double-Q magnetic ordering may persist over the entire coexistence range. Alternatively, there may exist a weak first order transition from a double-Q structure at lower fields to a single-Q modulation at higher fields. Together with the calculations of the NMR line-shape these results suggest the second scenario as a serious candidate for describing the superconducting state of CeCoIn5.

4+ pages

References in corpus (5)

• Observation of Spin Susceptibility Enhancement in the Possible FFLO State in CeCoIn${}_5$
• Pressure Study of Quantum Criticality in CeCoIn5
• Coexistence of SDW, d-wave singlet and staggered $\pi$-triplet superconductivity
• Exploring the fragile antiferromagnetic superconducting phase in CeCoIn5
• Inherent spin density wave instability by vortices in superconductors with strong Pauli effects

Cited by in corpus (7)

• Observation of the in-plane magnetic field-induced phase transitions in FeSe
• Interplay of the spin density wave and a possible Fulde-Ferrell-Larkin-Ovchinnikov state in $\mathrm{CeCoI}{\mathrm{n}}_5$ in rotating magnetic field
• Impurity-induced antiferromagnetic order in Pauli-limited nodal superconductors: application to heavy fermion CeCoIn5
• Switching dynamics of the spin density wave in superconducting CeCoIn5
• Impurity-induced magnetic droplet in unconventional superconductors near magnetic instability: Application to Nd doped $\mathbf{CeCoI}{\mathbf{n}}_5$
• Magnetic ordering in GdNi2B2C revisited by resonant x-ray scattering: evidence for the double-q model
• Coupled k-space structure of $d$-wave superconducting and magnetic orders induced by paramagnetic pair-breaking effect