Hexagonal and square flux line lattices in CeCoIn5.
作者： Morten Ring Eskildsen , Charles D. Dewhurst , Bart W. Hoogenboom , Cedomir Petrovic , Paul C. Canfield
DOI: 10.1103/PHYSREVLETT.90.187001
关键词:
摘要: Using small-angle neutron scattering, we have imaged the magnetic flux line lattice (FLL) in d-wave heavy-fermion superconductor CeCoIn5. At low fields find a hexagonal FLL. Around 0.6 T this undergoes what is most likely first-order transition to square symmetry, with nearest neighbors oriented along gap node directions. This orientation of FLL consistent theoretical predictions based on order parameter symmetry.
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