通过温度和角度相关的磁导率揭示的剥离黑磷中的弱反局域化效应

Weak antilocalization effect in exfoliated black phosphorus revealed by temperature- and angle-dependent magnetoconductivity.

作者信息

Hou Zhipeng, Gong Chen, Wang Yue, Zhang Qiang, Yang Bingchao, Zhang Hongwei, Liu EnKe, Liu Zhongyuan, Zeng Zhongming, Wu Guangheng, Wang Wenhong, Zhang Xi-Xiang

机构信息

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, State Key Laboratory for Magnetism, Chinese Academy of Sciences, Beijing 100190, People's Republic of China. King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering, Thuwal 23955-6900, Saudi Arabia.

出版信息

J Phys Condens Matter. 2018 Feb 28;30(8):085703. doi: 10.1088/1361-648X/aaa68e.

DOI:10.1088/1361-648X/aaa68e

PMID:29319004

Abstract

Recently, there have increasingly been debates on whether there exists a surface resonance state (SRS) in black phosphorus (BP), as suggested by recent angle-resolved photoemission spectroscopy results. To resolve this issue, we have performed temperature- and angle-dependent magnetoconductivity measurements on exfoliated, high-quality BP single crystals. A pronounced weak-antilocalization (WAL) effect was observed within a narrow temperature range of 8-16 K, with the electrical current flowing parallel to the cleaved ac-plane (along the a- or c-axis) and the magnetic field along the b-axis. The angle-dependent magnetoconductivity and the Hikami-Larkin-Nagaoka model-fitted results have revealed that the observed WAL effect shows surface-bulk coherent features, which supports the existence of SRS in BP.

摘要

最近，正如最近角分辨光电子能谱结果所表明的那样，关于黑磷（BP）中是否存在表面共振态（SRS）的争论越来越多。为了解决这个问题，我们对剥离的高质量BP单晶进行了温度和角度依赖的磁导率测量。在8 - 16 K的窄温度范围内观察到明显的弱反局域化（WAL）效应，电流平行于解理的ac平面（沿a轴或c轴）流动，磁场沿b轴。角度依赖的磁导率和Hikami-Larkin-Nagaoka模型拟合结果表明，观察到的WAL效应呈现出表面-体相相干特征，这支持了BP中SRS的存在。