In‐Plane Chirality Control of a Charge Density Wave by Means of Shear Stress

IF 27.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Advanced Materials Pub Date : 2024-11-16 DOI:10.1002/adma.202410950

Weiyan Qi, Stefano Ponzoni, Guénolé Huitric, Romain Grasset, Yannis Laplace, Laurent Cario, Alberto Zobelli, Marino Marsi, Evangelos Papalazarou, Alexandr Alekhin, Yann Gallais, Azzedine Bendounan, Suk Hyun Sung, Noah Schnitzer, Berit Hansen Goodge, Robert Hovden, Luca Perfetti

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Abstract

The transition metal dichalcogenide 1T‐TaS2 exhibits a Charge Density Wave (CDW) with in‐plane chirality. Due to the rich phase diagram, the Ferro‐Rotational Order (FRO) can be tuned by external stimuli. The FRO is studied by Angle‐Resolved Photoelectron Spectroscopy (ARPES), Raman spectroscopy, and Selected Area Electron Diffraction (SAED). The in‐plane chirality of the CDW is lost at the transition from Nearly‐Commensurate (NC) to In‐Commensurate (IC) phase and can be controlled by applying shear stress to the sample while cooling it through the transition from IC‐CDW to NC‐CDW. Based on these observations, a protocol is proposed to achieve reliable, non‐volatile state switching of the FRO configuration in 1T‐TaS2 bulk crystals. These results pave the way for new functional devices in which in‐plane chirality can be set on demand.

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通过剪切应力控制电荷密度波的平面内手性

过渡金属二掺杂物 1T-TaS2 显示出具有面内手性的电荷密度波 (CDW)。由于其丰富的相图，铁旋转阶（FRO）可以通过外部刺激进行调整。研究 FRO 的方法包括角度分辨光电子能谱（ARPES）、拉曼光谱和选区电子衍射（SAED）。在从近同相（NC）到内同相（IC）的转变过程中，CDW 的面内手性会消失，在从 IC-CDW 到 NC-CDW 的转变过程中，可以通过在冷却样品时施加剪切应力来控制。基于这些观察结果，我们提出了一种在 1T-TaS2 块状晶体中实现 FRO 配置的可靠、非易失状态切换的协议。这些成果为按需设置面内手性的新型功能器件铺平了道路。

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

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.