Theory of Neutron Diffraction from the Vortex Lattice in UPt3

Details Theory of Neutron Diffraction from the Vortex Lattice in UPt3 Theory of Neutron Diffraction from the Vortex Lattice in UPt3

1996-09-04

arxiv.org/abs/cond-mat/9609047v1

Physics

Condensed Matter

11 pages; uses REVTEX, APS and PRABIB styles; 2 Postscript figure files included

Scientific paper

10.1103/PhysRevLett.78.3189

Neutron scattering experiments have recently been performed in the superconducting state of UPt3 to determine the structure of the vortex lattice. The data show anomalous field dependence of the aspect ratio of the unit cell in the B phase. There is apparently also a change in the effective coherence length on the transition from the B to the C phases. Such observations are not consistent with conventional superconductvity. A theory of these results is constructed based on a picture of two-component superconductivity for UPt3. In this way, these unusual observations can be understood. There is a possible discrepancy between theory and experiment in the detailed field dependence of the aspect ratio.

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