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arXiv 2201.08829cond-mat.mtrl-scicond-mat.mes-hall
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二维碲中可调的手性依赖非线性电学响应

Tunable Chirality-dependent Nonlinear Electrical Responses in 2D Tellurium

Chang Niu, Gang Qiu, Yixiu Wang, Pukun Tan, Mingyi Wang, Jie Jian, Haiyan Wang, Wenzhuo Wu, Peide D. Ye

AI总结:

本研究通过热硫酸刻蚀和电子显微镜鉴定了二维碲的手性,发现其在磁场下具有栅极可调的纵向非互易电输运和横向非线性平面霍尔效应,且左右旋二维碲响应符号相反,为手性电子器件提供了平台。

摘要:

碲是一种具有简单手性晶体结构的元素半导体。通过溶液法合成的二维碲展现出优异的电学、光学和热学性质。本研究通过热硫酸刻蚀和高倾角高分辨率扫描透射电子显微镜,对水热法生长的二维碲的手性进行了鉴定与分析。在磁场下,二维碲中观察到了栅极可调的非线性电学响应,包括纵向的非互易电输运和横向的非线性平面霍尔效应。此外,由于手性对称性保证的相反自旋极化,左旋和右旋二维碲中的非线性电学响应具有相反的符号。两个对映体中自旋轨道耦合与晶体对称性的基本关系,通过将手性自由度引入电子输运,为实现基于手性的电子器件提供了可行平台。

英文摘要:

Tellurium (Te) is an elemental semiconductor with a simple chiral crystal structure. Te in a two-dimensional (2D) form synthesized by solution-based method shows excellent electrical, optical, and thermal properties. In this work, the chirality of hydrothermally grown 2D Te is identified and analyzed by hot sulfuric acid etching and high-angle tilted high-resolution scanning transmission electron microscopy. The gate-tunable nonlinear electrical responses, including the nonreciprocal electrical transport in the longitudinal direction and the nonlinear planar Hall effect in the transverse direction, are observed in 2D Te under a magnetic field. Moreover, the nonlinear electrical responses have opposite signs in left- and right-handed 2D Te due to the opposite spin polarizations ensured by the chiral symmetry. The fundamental relationship between the spin-orbit coupling and the crystal symmetry in two enantiomers provides a viable platform for realizing chirality-based electronic devices by introducing the chirality degree of freedom into electron transport.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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