Topological Landscape of Competing Charge Density Waves in 2H-NbSe2

Abstract

Despite decades of studies on charge density wave (CDW) of 2H-NbSe2, the origin of its incommensurate CDW ground state has not been understood. We discover that CDW of 2H-NbSe2 is composed of two different, energetically competing, structures. The lateral heterostructures of two CDWs are entangled as topological excitations, which give rise to a CDW phase shift and the incommensuration without a conventional domain wall. A partially melt network of the topological excitations and their vertices explain an unusual landscape of domains. The unconventional topological role of competing phases disclosed here can be widely applied to various incommensuration or phase coexistence phenomena in materials.

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Cited by in corpus (22)

• Yu-Shiba-Rusinov states in the charge-density modulated superconductor NbSe2
• Negative resistance state in superconducting NbSe${}_2$ induced by surface acoustic waves
• Confinement-engineered superconductor to correlated-insulator transition in a van der Waals monolayer
• Strain-induced stripe phase in charge ordered single layer NbSe${}_2$
• Directly visualizing nematic superconductivity driven by the pair density wave in NbSe${}_2$
• Odd-frequency pair density wave correlations in underdoped cuprates
• Identifying Topological Superconductivity in 2D Transition-Metal Dichalcogenides
• Visualization of alternating triangular domains of charge density waves in 2H-NbSe${}_2$ by scanning tunneling microscopy
• Coupled Sublattice Melting and Charge-Order Transition in Two Dimensions
• Magnetism between magnetic adatoms on monolayer NbSe${}_2$
• Strain-Induced Charge Density Waves with Emergent Topological States in Monolayer NbSe2
• Stacking of charge-density waves in 2H-NbSe${}_2$ bilayers
• Comparative study of Kondo effect in Vanadium dichalcogenides VX${}_2$ (X=Se & Te)
• Influence of surface relaxations on scanning probe microscopy images of the charge density wave material 2H-NbSe${}_2$
• Emergent Quantum Phenomena of Noncentrosymmetric Charge-Density Wave in 1T-Transition Metal Dichalcogenides
• Charge-density-wave control by adatom manipulation and its effect on magnetic nanostructures
• Bidirectional ultrafast control of charge density waves via phase competition
• RKKY interaction in the presence of a charge-density-wave order
• Spatial correlations of charge density wave order across the transition in 2H-NbSe2
• Atomic structures and electronic correlation of monolayer 1T-TaSe2
• Modulation of superconducting properties by the charge density wave at the surface of 2H-NbSe2
• Multiband charge density wave exposed in a transition metal dichalcogenide