Hexagonal and Square Flux Line Lattices in CeCoIn5

Date
2003-05-07
Authors
Eskildsen, Morten
Dewhurst, Charles
Hoogenboom, Bart
Petrovic, Cedomir
Canfield, Paul
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Ames Laboratory
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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 most 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.

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This article is from Physical Review Letters 90 (2003): 187001, doi:10.1103/PhysRevLett.90.187001. Posted with permission.

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Physics and Astronomy
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