Disorder and thermally driven vortex-lattice melting in La2-xSrxCuO4 crystals

Y. Radzyner, A. Shaulov, Y. Yeshurun, I. Felner, K. Kishio, J. Shimoyama

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Magnetization measurements in La2-xSrxCuO4 crystals indicate vortex order-disorder transition manifested by a sharp kink in the second magnetization peak. The transition field exhibits unique temperature dependence, namely a strong decrease with temperature in the entire measured range. This behavior rules out the conventional interpretation of a disorder-driven transition into an entangled vortex solid phase. It is shown that the transition in La2-xSrxCuO4 is driven by both thermally- and disorder-induced fluctuations, resulting in a pinned liquid state. We conclude that vortex solid-liquid, solid-solid and solid to pinned-liquid transitions are different manifestations of the same thermodynamic order-disorder transition, distinguished by the relative contributions of thermal and disorder-induced fluctuations.

Original languageEnglish
Article number100503
Pages (from-to)1005031-1005034
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number10
StatePublished - 1 Mar 2002


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