A Charge-Density-Wave Topological Semimetal

Abstract

Topological physics and strong electron-electron correlations in quantum materials are typically studied independently. However, there have been rapid recent developments in quantum materials in which topological phase transitions emerge when the single-particle band structure is modified by strong interactions. We here demonstrate that the room-temperature phase of (TaSe${}_4$)${}_2$I is a Weyl semimetal with 24 pairs of Weyl nodes. Owing to its quasi-1D structure, (TaSe${}_4$)${}_2$I hosts an established CDW instability just below room temperature. Using X-ray diffraction, angle-resolved photoemission spectroscopy, and first-principles calculations, we find that the CDW in (TaSe${}_4$)${}_2$I couples the bulk Weyl points and opens a band gap. The correlation-driven topological phase transition in (TaSe${}_4$)${}_2$I provides a route towards observing condensed-matter realizations of axion electrodynamics in the gapped regime, topological chiral response effects in the semimetallic phase, and represents an avenue for exploring the interplay of correlations and topology in a solid-state material.

arXiv commentFinal version, 14 pg main text + 28 pg supplement, 5 + 16 figures

References in corpus (44)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Type-II Weyl Semimetals
• Weyl Semimetal in a Topological Insulator Multilayer
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Topological quantum chemistry
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• The (High Quality) Topological Materials In The World
• Discovery of a Weyl Fermion semimetal state in NbAs
• Quantized circular photogalvanic effect in Weyl semimetals
• Fermi surface nesting and the origin of Charge Density Waves in metals
• Prediction of the Weyl semimetal in the orthorhombic MoTe2
• Dirac Fermions in Solids - from High Tc cuprates and Graphene to Topological Insulators and Weyl Semimetals
• Observation of the Type-II Weyl Semimetal Phase in MoTe2
• Topological quantum properties of chiral crystals
• Multiple types of topological fermions in transition metal silicides
• MoTe2: A Type-II Weyl Topological Metal
• Large Fermi Arcs in Unconventional Weyl Semimetal RhSi
• A new type of Weyl semimetal with quadratic double Weyl fermions in SrSi2
• Discovery of topological chiral crystals with helicoid arc states
• New classes of chiral topological nodes with non-contractible surface Fermi arcs in CoSi
• Time-Reversal-Breaking Weyl Fermions in Magnetic Heusler Alloys
• Double Dirac Semimetals in Three Dimensions
• Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi
• Fermi Surface Topological Invariants for Time Reversal Invariant Superconductors
• Chiral Topological Semimetal with Multifold Band Crossings and Long Fermi arcs
• Chiral anomaly, Charge Density Waves, and Axion Strings from Weyl Semimetals
• Evidence for an axionic charge density wave in the Weyl semimetal (TaSe4)2I
• Giant intrinsic spin Hall effect in the TaAs family of Weyl semimetals
• Quasiparticle interference of the Fermi arcs and surface-bulk connectivity of a Weyl semimetal
• Rotation Anomaly and Topological Crystalline Insulators
• Observation and control of maximal Chern numbers in a chiral topological semimetal
• Atomic Scale Visualization of Quantum Interference on a Weyl Semimetal Surface by Scanning Tunneling Microscopy/Spectroscopy
• Topological nodal Cooper pairing in doped Weyl metals
• Symmetry-Enforced Weyl Phonons
• Response Properties of Axion Insulators and Weyl Semimetals Driven by Screw Dislocations and Dynamical Axion Strings
• First-principles study of the low-temperature charge density wave phase in the quasi-one-dimensional Weyl chiral compound (TaSe${}_4$)${}_2$I
• Electronic Instability in a Zero-Gap Semiconductor: the Charge-Density Wave in (TaSe4)2I
• Axionic Band Topology in Inversion-Symmetric Weyl-Charge-Density Waves
• The J-triplet Cooper pairing with magnetic dipolar interactions
• Monopole Charge Density Wave States in Weyl Semimetals

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