Physics – Condensed Matter – Superconductivity
Scientific paper
1997-08-11
Physics
Condensed Matter
Superconductivity
7 pages, 3 postscript figures
Scientific paper
10.1103/PhysRevLett.80.145
Small angle neutron diffraction experiments are analyzed using recently developed and properly generalized one-field effective free energy method. In the case of experiment of Keimer et al on YBCO, we show that the fourfold symmetry of the underlying crystal is explicitly broken, but the reflection with respect to the [110] and [1\={1}0] axes remains a symmetry. The vortex lattice also becomes generally oblique instead of rectangular body centered. Unexpectedly rich phase diagram is described.
Chang Darwin
Mou Chung-Yu
Rosenstein Baruch
Wu Ching-Long
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