Vortex-unbinding and finite-size effects in Tl2Ba2CaCu2O8 thin films

Article

关键词: KOSTERLITZ-THOULESS TRANSITION;    SUPERCONDUCTING FILMS;    PHASE-TRANSITIONS;    2 DIMENSIONS;    FLUCTUATIONS;    TEMPERATURE;    DYNAMICS;    ABSENCE;    FIELD;    ORDER;   

DOI  :  10.1103/PhysRevB.68.094516

来源: SCIE

【 摘 要 】

Current-voltage (I-V) characteristics of Tl2Ba2CaCu2O8 thin films in zero magnetic field are measured and analyzed with the conventional Kosterlitz-Thouless-Berezinskii (KTB) approach, dynamic scaling approach and finite-size scaling approach, respectively. It is found from these results that the I-V relation is determined by the vortex-unbinding mechanism with the KTB dynamic critical exponent z=2. On the other hand, the evidence of finite-size effect is also found, which blurs the feature of a phase transition.

【 授权许可】

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