Atomic-Scale Visualization of Chiral Charge Density Wave States and Their Reversible Transition

Abstract

Chirality is essential for various amazing phenomena in life and matter. However,chirality and its switching in electronic superlattices, such as charge density wave(CDW) arrays, remain elusive. In this study, we characterize the chirality transition with atom-resolution imaging in a single-layer NbSe2 CDW pattern by technique of scanning tunneling microscopy. The atomic lattice of the CDW array is found continuous and intact although its chirality is switched. Several intermediate states are tracked by time-resolved imaging, revealing the fast and dynamic chirality transition. Importantly, the switching is reversibly realized with an external electric-field. Our findings unveil the delicate transition process of chiral CDW array in a 2D crystal down to the atomic scale and may be applicable for future nanoscale devices.

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Cited by in corpus (7)

• Electrical switching of ferro-rotational order in nano-thick 1T-TaS${}_2$ crystals
• Understanding chiral charge-density wave by frozen chiral phonon
• Lattice-Driven Chiral Charge Density Wave State in 1T-TaS${}_2$
• Chiral charge density wave and backscattering-immune orbital texture in monolayer 1T-TiTe2
• Symmetry analysis of cross-circular and parallel-circular Raman optical activity
• Charge-density-wave control by adatom manipulation and its effect on magnetic nanostructures
• Dual role of stripe phase on superconducting correlation in a bilayer square lattice