Experimental evidence for a first-order vortex-lattice-melting transition in untwinned, single crystal YBa2Cu3O7

H. Safar, P. L. Gammel, David A. Huse, D. J. Bishop, J. P. Rice, D. M. Ginsberg

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Abstract

We report on current-voltage measurements in clean, untwinned YBa2Cu3O7 single crystals with picovolt voltage sensitivity and millikelvin temperature resolution in magnetic fields ranging up to 7 T. We find evidence for a melting transition in the vortex lattice which is hysteretic in both temperature and magnetic field. The measured thermal and magnetic hysteresis widths are related by the local slope of the phase boundary. This strongly supports the picture that, in the clean limit, the melting transition of the Abrikosov vortex lattice is a first-order phase transition.

Original languageEnglish (US)
Pages (from-to)824-827
Number of pages4
JournalPhysical Review Letters
Volume69
Issue number5
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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