Electronic transport properties of WS2 using ensemble Monte Carlo method

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-03-14 DOI:10.1088/1361-6641/ad2ec6

M Derya Alyörük

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Abstract

The electronic transport characteristics of tungsten disulfide (WS₂) sheets are studied using the ensemble Monte Carlo technique in the presence of intrinsic scattering mechanisms only. The transport properties of the material are obtained in a two-valley model where intra- and inter-valley scatterings are considered in K and Q valleys. The velocity overshoot effect is observed for some applied field values. Negative differential phenomena are seen for some values of the energy difference between K and Q valleys (

ΔEKQ

), therefore

ΔEKQ

and the effective mass of carriers in the Q valley has a critical role in the transport and mobility characteristics of WS₂. The mobility of carriers is calculated as a function of temperature and the results are compatible with some existing theoretical and experimental predictions.

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利用蒙特卡洛集合法研究 WS2 的电子传输特性

在仅存在内在散射机制的情况下，使用集合蒙特卡罗技术研究了二硫化钨（WS2）薄片的电子传输特性。材料的输运特性是在双谷模型中获得的，其中考虑了 K 谷和 Q 谷中的谷内和谷间散射。在某些外加磁场值中观察到了速度过冲效应。在 K 谷和 Q 谷之间能量差（ΔEKQ）的某些值上会出现负差分现象，因此ΔEKQ 和 Q 谷中载流子的有效质量对 WS2 的传输和迁移率特性起着至关重要的作用。我们计算了载流子的迁移率与温度的函数关系，结果与现有的一些理论和实验预测相符。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.