Magnetic structure of antiferromagnetic Fulde-Ferrell-Larkin-Ovchinnikov state

Abstract

The properties of incommensurate antiferromagnetic (AFM) order in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is studied by solving the Bogoliubov-de-Gennes (BdG) equations. The relationship between the electronic structure and the magnetic structure is clarified. We find that the magnetic structure in the AFM-FFLO state includes three cases. (I) In the strongly localized case, the AFM staggered moment is confined into the FFLO nodal planes where the superconducting order parameter vanishes. (II) In the weakly localized case, the AFM staggered moment appears in the whole spatial region, and its magnitude is enhanced around the FFLO nodal planes. (III) In the extended case, the AFM staggered moment is nearly homogeneous and slightly suppressed in the vicinity of FFLO nodal planes. The structure of Bragg peaks in the momentum resolved structure factor is studied in each case. We discuss the possibility of AFM-FFLO state in the heavy fermion superconductor CeCoIn_5 by comparing these results with the neutron scattering data. Experimentally the magnetic structure and its dependence on the magnetic field orientation in the high field superconducting phase of CeCoIn_5 are consistent with the case (II).

10 pages

References in corpus (11)

• Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
• Calorimetric Evidence for a Fulde-Ferrell-Larkin-Ovchinnikov Superconducting State in the Layered Organic Superconductor κ$-(BEDT-TTF)$_2$Cu(NCS)$_2$
• Anomalous In-Plane Anisotropy of the Onset of Superconductivity in (TMTSF)2ClO4
• Observation of Spin Susceptibility Enhancement in the Possible FFLO State in CeCoIn${}_5$
• FFLO Superconductivity near the Antiferromagnetic Quantum Critical Point
• Coexistence of SDW, d-wave singlet and staggered $\pi$-triplet superconductivity
• Vortex tilt modulus in Fulde-Ferrell-Larkin-Ovchinnikov state
• Field Dependence of the Ground State in the Exotic Superconductor CeCoIn${}_5$: a Nuclear Magnetic Resonance Investigation
• Coupled SDW and Superconducting Order in FFLO State of CeCoIn${}_5$
• High field superconducting phase diagrams including Fulde-Ferrell-Larkin-Ovchinnikov vortex states
• Antiferromagnetic order in the FFLO state

Cited by in corpus (8)

• Intertwined Orders in Heavy-Fermion Superconductor CeCoIn${}_5$
• Emergent Antiferromagnetism in D-wave Superconductor with Strong Paramagnetic Pair-Breaking
• Coexistence of superconductivity and incommensurate magnetic order
• Impurity-induced antiferromagnetic order in Pauli-limited nodal superconductors: application to heavy fermion CeCoIn5
• Structure of magnetic order in Pauli limited unconventional superconductors
• Spin susceptibility of Andreev bound states
• Fulde-Ferrell-Larkin-Ovchinnikov state in strongly correlated d-wave superconductors
• Enhancement of Electronic Spin Susceptibility in Pauli Limited Unconventional Superconductors