Hexagonal and Square Flux Line Lattices in CeCoIn5
arXiv:cond-mat/0211585 · doi:10.1103/PhysRevLett.90.187001
Abstract
Using small-angle neutron scattering, we have imaged the magnetic flux line lattice (FLL) in the d-wave heavy-fermion superconductor CeCoIn5. At low fields we find a hexagonal FLL. Around 0.6 T this undergoes what is very likely a first-order transition to square symmetry, with the nearest neighbors oriented along the gap node directions. This orientation of the square FLL is consistent with theoretical predictions based on the d-wave order parameter symmetry.
4 pages, 3 figs (1 color)
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- Field-angle Dependence of the Zero-Energy Density of States in the Unconventional Heavy-Fermion Superconductor CeCoIn5
- Observation of a Triangular to Square Flux Lattice Phase Transition in YBCO
- Anomalous quasiparticle transport in the superconducting state of CeCoIn5
- Point-Contact Spectroscopy of the Heavy-Fermion Superconductor CeCoIn
- Vortex studies in superconducting Ba(Fe0.93Co0.07)2As2
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- Observations of Pauli Paramagnetic Effects on the Flux Line Lattice in CeCoIn5
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- Visualizing Heavy Fermion Confinement and Pauli-Limited Superconductivity in Layered CeCoIn5
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- Strong pressure dependence of the magnetic penetration depth in single crystals of the heavy fermion superconductor CeCoIn5 studied by muon spin rotation
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- Field-induced hexagonal to square transition of the vortex lattice in overdoped La{1.8}Sr{0.2}CuO{4}
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- Influence of the Fermi Surface Morphology on the Magnetic Field-Driven Vortex Lattice Structure Transitions in YBaCuO0, 0.15
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