Effects of point defects on the phase diagram of vortex states in high- T(c) superconductors in the B parallel to c axis.
The phase diagram for the vortex states of high- T(c) superconductors with point defects in the B--> parallel to c axis is drawn by large-scale Monte Carlo simulations. The vortex slush (VS) phase is found between the vortex glass (VG) and vortex liquid (VL) phases. The first-order transition between this novel normal phase and the VL phase is characterized by a sharp jump of the density of dislocations. The first-order transition between the Bragg glass (BG) and VG or VS phases is also clarified. These two transitions are compared with the melting transition between the BG and VL phases.
Nonomura
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National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047 Japan. nonomura.yoshihiko@nims.go.jp
Hu
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