Triple sign reversal of the Hall effect in HgBa2CaCu2O6 thin films after heavy-ion irradiation

Article

关键词: QUASI-PARTICLE SPECTRA;    MIXED-STATE;    SCALING BEHAVIOR;    II SUPERCONDUCTORS;    COLUMNAR DEFECTS;    SINGLE-CRYSTALS;    VORTEX;    YBA2CU3O7-DELTA;    RESISTIVITY;    DEPENDENCE;   

DOI  :  10.1103/PhysRevB.61.722

来源: SCIE

【 摘 要 】

The triple sign reversal in the mixed-state Hall effect has been observed in ion-irradiated HgBa2CaCu2O6 thin films. The negative dip at the third sign reversal is more pronounced for higher fields, which is opposite to the case of the first sign reversal near T-c in most high-T-c superconductors. These observations can be explained by a recent prediction in which the third sign reversal is attributed to the energy derivative of the density of states and to a temperature-dependent function related to the superconducting energy gap. These contributions prominently appear in cases where the mean free path is significantly decreased, such as our case of ion-irradiated thin films.

【 授权许可】

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