Ba(FeCo)As晶体中可能存在贝雷津斯基-科斯特利茨-索利斯转变的证据。

Possible Evidence for Berezinskii-Kosterlitz-Thouless Transition in Ba(FeCo)As Crystals.

作者信息

Jiao Wen-He, Xu Xiao-Feng, Jiang Hao, Xu Zhu-An, Chen Qing-Hu, Cao Guang-Han

机构信息

Interdisciplinary Center for Quantum Information, Zhejiang Province Key Laboratory of Quantum Technology and Devices, Department of Physics, Zhejiang University, Hangzhou 310027, China.

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

出版信息

Materials (Basel). 2021 Oct 22;14(21):6294. doi: 10.3390/ma14216294.

DOI:10.3390/ma14216294

PMID:34771819

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8585216/

Abstract

In this study, we measure the in-plane transport properties of high-quality Ba(FeCo)As single crystals. Signatures of vortex unbinding Berezinskii-Kosterlitz-Thouless (BKT) transition are shown from both the conventional approach and the Fisher-Fisher-Huse dynamic scaling analysis, in which a characteristic Nelson-Kosterlitz jump is demonstrated. We also observe a non-Hall transverse signal exactly at the superconducting transition, which is explained in terms of guided motion of unbound vortices.

摘要

在本研究中，我们测量了高质量Ba(FeCo)As单晶的面内输运性质。从传统方法和费舍尔-费舍尔-胡斯动态标度分析中都显示出涡旋解束缚的贝雷津斯基-科斯特利茨- Thouless（BKT）转变的特征，其中展示了一个特征性的尼尔森-科斯特利茨跳跃。我们还恰好在超导转变时观测到一个非霍尔横向信号，这是根据未束缚涡旋的引导运动来解释的。