Correlated electronic states at domain walls of a Mott-charge-density-wave insulator 1T-TaS2

Abstract

Domain walls in interacting electronic systems can have distinct localized states, which often govern physical properties and may lead to unprecedented functionalities and novel devices. However, electronic states within domain walls themselves have not been clearly identified and understood for strongly correlated electron systems. Here, we resolve the electronic states localized on domain walls in a Mott-charge-density-wave(CDW) insulator 1T-TaS2 using scanning tunneling spectroscopy. We establish that the domain wall state decomposes into two nonconducting states located at the center of domain walls and edges of domains. Theoretical calculations reveal their atomistic origin as the local reconstruction of domain walls under the strong influence of electron correlation. Our results introduce a concept for the domain wall electronic property, the wall's own internal degrees of freedom, which is potentially related to the controllability of domain wall electronic properties.

References in corpus (4)

• Gate-tunable Phase Transitions in 1T-TaS${}_2$
• Controlling many-body states by the electric-field effect in a two-dimensional material
• Experimental demonstration of hybrid improper ferroelectricity and presence of abundant charged walls in (Ca,Sr)${}_3$Ti${}_2$O${}_7$ crystals
• Disorder-Induced Stabilization of the Pseudogap in Strongly Correlated Systems

Cited by in corpus (19)

• Direct identification of Mott Hubbard band pattern beyond charge density wave superlattice in monolayer 1T-NbSe2
• Distinguishing a Mott Insulator from a Trivial Insulator with Atomic Adsorbates
• Topological Landscape of Competing Charge Density Waves in 2H-NbSe2
• Effect of Stacking Order on the Electronic State of 1T-TaS${}_2$
• Electrical switching of ferro-rotational order in nano-thick 1T-TaS${}_2$ crystals
• Possible strain induced Mott gap collapse in 1T-TaS${}_2$
• Zoology of domain walls in quasi-2D correlated charge density wave of 1T-TaS2
• Spin-orbit and exchange proximity couplings in graphene/1T-TaS${}_2$ heterostructure triggered by a charge density wave
• Quantum billiards with correlated electrons confined in triangular transition metal dichalcogenide monolayer nanostructures created by laser quench
• Modified interlayer stacking and insulator to correlated-metal transition driven by uniaxial strain in 1$T$-TaS${}_2$
• Control of charge-spin interconversion in van der Waals heterostructures with chiral charge density waves
• Honeycomb-Lattice Mott insulator on Tantalum Disulphide
• Charge order with unusual star-of-David lattice in monolayer NbTe2
• Atomically sharp 1D interfaces in 2D lateral heterostructures of VSe${}_2$-NbSe${}_2$ monolayers
• Origin of Distinct Insulating Domains in the Layered Charge Density Wave Material 1T-TaS2
• Mobile Kink Solitons in a Van der Waals Charge-Density-Wave Layer
• Dynamic phase transition into a mixed-CDW state in 1$T$-TaS${}_2$ via a thermal quench
• Coexistence of insulating phases in confined fermionic chains with a Wannier-Stark potential
• Topical review: the nature of the ground state and possibility of a quantum spin liquid in 1T metal dichalcogenides