Real-space vortex glass imaging and the vortex phase diagram of SnMo6S8

Details Real-space vortex glass imaging and the vortex phase diagram of SnMo6S8 Real-space vortex glass imaging and the vortex phase diagram of SnMo6S8

2009-03-13

arxiv.org/abs/0903.2389v1

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

Using scanning tunnelling microscopy at 400mK, we have obtained maps of around 100 vortices in SnMo6S8 from 2 - 9T. The orientational and positional disorder at 5 and 9T show that these are the first large-scale images of a vortex glass. At higher temperature a magnetisation peak effect is observed, whose upper boundary coincides with a lambda anomaly in the specific heat. Our data favour a kinetic glass description of the vortex melting transition, indicating that vortex topological disorder persists at fields and temperatures far below the peak effect in low-Tc superconductors.

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