THERMODYNAMIC OBSERVATION OF FIRST-ORDER VORTEX-LATTICE MELTING TRANSITION IN BI2SR2CACU2O8
- Zeldov, Eli
- Majer, D.
- Konczykowski, Marcin
- Geshkenbein, Vadim B.
- Vinokur, Valerii M.
- Shtrikman, H.
DOIAbstract
International audienceThe lattice of magnetic flux lines that can permeate a type ii superconductor, such as the high-transition-temperature copper oxide materials, melts from a solid-like stale to a liquid-like state at a temperature below the superconducting transition temperature. Contrary to the predictions of mean-field theory, this phase transition in Bi2Sr2CaCu2O8 is found to be first-order. The vortex liquid discontinuously expands on freezing
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