Modulated Vortex Lattice in High Fields and Gap Nodes

Abstract

The mean field vortex phase diagram of a quasi two dimensional superconductor with a nodal d-wave pairing and with strong Pauli spin depairing is examined in the parallel field case in order to examine an effect of gap nodes (or minima) on the stability of a FFLO-like vortex lattice. We find through a heuristic argument and a model calculation with a four-fold anisotropic Fermi velocity that the FFLO-like state is relatively suppressed as the field approaches a nodal direction. When taking account of a couple of experimental results altogether, the present result strongly suggests that a node or gap minimum of the pairing function of CeCoIn${}_5$ is located along the [100]-direction.

5 pages, 2 figures, References were added. To appear in Phys. Rev. B

References in corpus (8)

• Fulde-Ferrell-Larkin-Ovchinnikov Superconducting State in CeCoIn5
• Superconductivity and Quantum Criticality in CeCoIn_5
• First order superconducting phase transition in CeCoIn${}_5$
• Magnetic field - temperature phase diagram of quasi-two-dimensional organic superconductor lambda-(BETS)_2 GaCl_4 studied via thermal conductivity
• Effects of Pauli paramagnetism on superconducting vortex phase diagram in strong fields
• Field-angle Dependence of the Zero-Energy Density of States in the Unconventional Heavy-Fermion Superconductor CeCoIn5
• Reentrant vortex lattice transformation in four-fold symmetric superconductors
• Hexagonal and Square Flux Line Lattices in CeCoIn5

Cited by in corpus (16)

• Fulde-Ferrell-Larkin-Ovchinnikov State in Heavy Fermion Superconductors
• Sign reversal of field-angle resolved heat capacity oscillations in a heavy fermion superconductor CeCoIn${}_5$ and $d_{x^2-y^2}$ pairing symmetry
• Vortex states in superconductors with strong Pauli-paramagnetic effect
• Interplay of paramagnetic, orbital and impurity effects on the phase transition of a normal metal to superconducting state
• Vortex state in a Fulde-Ferrell-Larkin-Ovchinnikov superconductor based on the quasiclassical theory
• Vortex tilt modulus in Fulde-Ferrell-Larkin-Ovchinnikov state
• High field superconducting phase diagrams including Fulde-Ferrell-Larkin-Ovchinnikov vortex states
• Theory of pairing symmetry in Fulde-Ferrell-Larkin-Ovchinnikov vortex state and vortex lattice
• Mixed-State Thermodynamics of Superconductors with Moderately Large Paramagnetic Effects
• Pairing Symmetry of CeCoIn${}_5$ Detected by In-plane Torque Measurements
• Vortex state in d-wave superconductors with strong paramagnetism: transport and specific heat anisotropy
• Field Evolution of the Fulde-Ferrell-Larkin-Ovchinnikov State in a Superconductor with Strong Pauli Effects
• Nonmagnetic impurity resonance states as a test of superconducting pairing symmetry in CeCoIn${}_5$
• Microscopic Eilenberger theory of Fulde-Ferrell-Larkin-Ovchinnikov states in the presence of vortices
• Comment on "Fluctuation-Driven First-Order Transition in Pauli-Limited $d$-Wave Superconductors"
• Spatial modulation of a unitary impurity-induced resonances in superconducting CeCoIn${}_5$