An unusual phase transition to a second liquid vortex phase in the superconductor YBa2Cu3O7

@article{Bouquet2001AnUP,
  title={An unusual phase transition to a second liquid vortex phase in the superconductor YBa2Cu3O7},
  author={Fabrice Bouquet and Ch. Marcenat and Eckhard Steep and Roberto Calemczuk and Wai Kwong Kwok and Ulrich Welp and George William Crabtree and Richard Allen Fisher and Nolan Edward Phillips and Anne Schilling},
  journal={Nature},
  year={2001},
  volume={411},
  pages={448-451}
}
A magnetic field penetrates a superconductor through an array of ‘vortices’, each of which carries one quantum of flux that is surrounded by a circulating supercurrent. In this vortex state, the resistivity is determined by the dynamical properties of the vortex ‘matter’. For the high-temperature copper oxide superconductors (see ref.1 for a theoretical review), the vortex phase can be a ‘solid’, in which the vortices are pinned, but the solid can ‘melt’ into a ‘liquid’ phase, in which their… CONTINUE READING
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