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journal article·2024-12Open access

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

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

Advanced Materials· Volume 36· Issue 52
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Abstract

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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Research context

OpenAlex topics: Solid-state spectroscopy and crystallography · Crystal Structures and Properties · 2D Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratoire des Solides Irradiés, CEA/DRF/lRAMIS Ecole Polytechnique, CNRS Institut Polytechnique de Paris F‐91128 Palaiseau France

Nantes Université, CNRS Institut des Matériaux de Nantes Jean Rouxel, IMN F‐44000 Nantes France

Université Paris‐Saclay, CNRS Laboratoire de Physique des Solides 91405 Orsay Cedex France

Université Paris Cité, Matériaux et Phénomènes Quantiques UMR CNRQ 7162, Batiment Condorcet 75205 Paris Cedex 13 France

Synchrotron SOLEIL Saint Aubin BP 48 Gif‐sur‐Yvette F‐91192 France

The Rowland Institute at Harvard Harvard University Cambridge MA 02412 USA

School of Applied and Engineering Physics Cornell University Ithaca NY 14853 USA

Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany

Department of Materials Science and Engineering University of Michigan Ann Arbor MI 48109 USA

Funding

Agence Nationale de la Recherche · Conseil Régional, Île-de-France

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