钉扎涡旋晶格中空位引起的霍尔异常：对BSCCO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
摘要：
霍尔异常，出现在混合态霍尔电阻率的第二类超导体，有许多理论，但尚未达成共识，其起源。在这项工作中，我们进行了定量分析的磁输运测量BSCCO薄膜的赵等。122，247001（2019）]并验证先前提出的空缺机制[比照。J.物理.康登斯所谓了10，L 677（1998）]与多体涡相关的现象。该模型将霍尔反常归因于钉扎碎片中空位的运动。通过对涡旋晶体上Kosterlitz-Escherless相变附近涡旋态的研究，首次验证了该方法的有效性。然后进行比较之间的测量激活能与计算的创建能量的涡反涡对和磁通线晶格上的空位能量，没有可调参数。我们的分析阐明了空缺模型的理论基础和前提条件。特别是，空位激活能是一个数量级小于一个单一的涡线。该机制可为其他研究提供宏观理论框架。
英文摘要：
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.
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