Autor: |
Kawano-Furukawa H, Bowell CJ, White JS, Heslop RW, Cameron AS, Forgan EM, Kihou K, Lee CH, Iyo A, Eisaki H, Saito T, Fukazawa H, Kohori Y, Cubitt R, Dewhurst CD, Gavilano JL, Zolliker M |
Rok vydání: |
2011 |
Zdroj: |
PHYSICAL REVIEW B |
DOI: |
10.1103/PhysRevB.84.024507 |
Popis: |
By neutron scattering we have observed a well ordered magnetic vortex lattice (VL) in KFe2As2 single crystals. With the field along the c axis a nearly isotropic hexagonal VL is formed with no symmetry transitions up to high fields indicating a small anisotropy of the superconducting state around this axis. This rules out line nodes parallel to the c axis and thus d wave or anisotropic s wave pairing. However the strong temperature dependence of the signal at T « Tc shows that extremely small gap values exist; these may arise from nodal lines perpendicular to the c axis. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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