论文标题
空缺hall异常在固定的涡旋晶格中：对BSCCO的薄膜数据的定量分析
Hall anomaly by vacancies in pinned lattice of vortices: A quantitative analysis on the thin-film data of BSCCO
论文作者
论文摘要
Hall Anomaly在II型超导体的混合国家电阻率中出现，但对其起源有许多理论，但对其起源有了共识。在这项工作中，我们对Zhao等人的BSCCO薄膜上的磁转运测量进行了定量分析。 [物理。莱特牧师。 122，247001（2019）]并验证了先前提出的空缺机制[cf. J. Phys。冷凝物。事情。 10，L677（1998）]该现象具有多体涡流相关性。该模型将大厅异常归因于涡旋晶格的固定片段中空缺的运动。首先，通过对Kosterlitz附近的涡旋状态进行探索 - 涡流晶体上的涡旋状态。然后，在测得的激活能与涡流 - 抗涡流对的创建能量与磁通线晶格上的空位能量之间进行比较，没有可调节的参数。我们的分析阐明了空缺模型的理论基础和先决条件。特别是，空位激活能量比唯一涡流线小的数量级。提出的机制可能为其他研究提供宏观理论框架。
Hall anomaly, as appears in the mixed-state Hall resistivity of type-II superconductors, has had numerous theories but yet a consensus on its origin. In this work, we conducted a quantitative analysis of the magnetotransport measurements on BSCCO thin films by Zhao et al. [Phys. Rev. Lett. 122, 247001 (2019)] and validate a previously proposed vacancy mechanism [cf. J. Phys. Condens. Matter. 10, L677 (1998)] with many-body vortex correlations for the phenomenon. The model attributes the Hall anomaly to the motion of vacancies in pinned fragments of vortex lattice. Its validity is first examined by an exploration on the vortex states near the Kosterlitz-Thouless transition on the vortex crystal. Comparisons are then carried out between the measured activation energies with the calculated creation energy of the vortex-anti-vortex pair and the vacancy energy on the flux-line lattice, with no adjustable parameter. Our analysis elucidates the theoretical basis and prerequisites of the vacancy model. In particular, the vacancy activation energies are an order of magnitude smaller than that of a sole vortex line. The proposed mechanism may provide a macro-theoretical framework for other studies.
