Vortex lattice studies in CeCoIn5 with H perpendicular to c

Abstract

We present small angle neutron scattering studies of the vortex lattice (VL) in CeCoIn5 with magnetic fields applied parallel (H) to the antinodal [100] and nodal [110] directions. For H || [100], a single VL orientation is observed, while a 90 degree reorientation transition is found for H || [110]. For both field orientations and VL configurations we find a distorted hexagonal VL with an anisotropy, Gamma = 2.0 +/- 0.05. The VL form factor shows strong Pauli paramagnetic effects similar to what have previously been reported for H || [001]. At high fields, above which the upper critical field (Hc2) becomes a first-order transition, an increased disordering of the VL is observed.

5 pages, 4 figures

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• Anisotropy and multiband superconductivity in Sr2RuO4
• Visualizing Heavy Fermion Confinement and Pauli-Limited Superconductivity in Layered CeCoIn5
• Quantum critical quasiparticle scattering within the superconducting state of CeCoIn5
• Influence of the Fermi Surface Morphology on the Magnetic Field-Driven Vortex Lattice Structure Transitions in YBa${}_2$Cu${}_3$O${}_{7-\delta }:\delta =$0, 0.15
• Normal Fermi Surface in the Nodal Superconductor CeCoIn${}_5$ Revealed via Thermal Conductivity
• Muon Spin Rotation in Heavy Electron Pauli Limited Superconductors