Zoology of domain walls in quasi-2D correlated charge density wave of 1T-TaS2

Abstract

Domain walls in correlated charge density wave compounds such as 1T-TaS2 can have distinct localized states which govern physical properties and functionalities of emerging quantum phases. However, detailed atomic and electronic structures of domain walls have largely been elusive. We identify using scanning tunneling microscope and density functional theory calculations the atomic and electronic structures for a plethora of discommensuration domain walls in 1T-TaS2 quenched metastably with nanoscale domain wall networks. The domain walls exhibit various in-gap states within the Mott gap but metallic states appear in only particular types of domain walls. A systematic understanding of the domain-wall electronic property requests not only the electron counting but also including various intertwined interactions such as structural relaxation, electron correlation, and charge transfer. This work guides the domain wall engineering of the functionality in correlated van der Waals materials.

7 pages, 4 figures

References in corpus (6)

• Controlling many-body states by the electric-field effect in a two-dimensional material
• Influence of domain walls in the incommensurate charge density wave state of Cu intercalated 1$T$-TiSe${}_2$
• The low-temperature highly correlated quantum phase in the charge-density-wave 1T-TaS_2 compound
• Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2
• Possible strain induced Mott gap collapse in 1T-TaS${}_2$
• Direct Observation of Mono-, Bi-, and Tri-layer Charge Density Waves in 1T-TaS_2 by Transmission Electron Microscopy without a Substrate

Cited by in corpus (11)

• Electrical switching of ferro-rotational order in nano-thick 1T-TaS${}_2$ crystals
• Out-of-plane transport of 1T-TaS2/graphene-based van der Waals heterostructures
• Snapshots of a light-induced metastable hidden phase driven by the collapse of charge order
• Mobile Kink Solitons in a Van der Waals Charge-Density-Wave Layer
• Moiré Modulation of Charge Density Waves
• Dynamic phase transition into a mixed-CDW state in 1$T$-TaS${}_2$ via a thermal quench
• Stacking of charge-density waves in 2H-NbSe${}_2$ bilayers
• Nonvolatile optical control of interlayer stacking order in 1T-TaS2
• Topical review: the nature of the ground state and possibility of a quantum spin liquid in 1T metal dichalcogenides
• Non-local optical response of a multi-phased quantum material
• Electronic Coherence Evolution at the Nearly Commensurate Incommensurate CDW Boundary of 1T-TaS2