The low-temperature highly correlated quantum phase in the charge-density-wave 1T-TaS_2 compound

Abstract

A prototypical quasi-2D metallic compound, 1T-TaS_2 has been extensively studied due to an intricate interplay between a Mott-insulating ground state and a charge density-wave (CDW) order. In the low-temperature phase, 12 out of 13 Ta_{4+} 5\textit{d}-electrons form molecular orbitals in hexagonal star-of-David patterns, leaving one 5\textit{d}-electron with \textit{S} = 1/2 spin free. This orphan quantum spin with a large spin-orbit interaction is expected to form a highly correlated phase of its own. And it is most likely that they will form some kind of a short-range order out of a strongly spin-orbit coupled Hilbert space. In order to investigate the low-temperature magnetic properties, we performed a series of measurements including neutron scattering and muon experiments. The obtained data clearly indicate the presence of the short-ranged phase and put the upper bound on ~ 0.4 \textitμ_B for the size of the magnetic moment, consistent with the orphan-spin scenario.

arXiv comment11 pages, 4 figures + supplemental material. Accepted by npj Quantum Materials

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Cited by in corpus (51)

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• Mott insulating states with competing orders in the triangular lattice Hubbard model
• Gapless excitations in the ground state of 1T-TaS${}_2$
• Coexisting localized and itinerant gapless excitations in a quantum spin liquid candidate 1T-TaS${}_2$
• Tunneling spectroscopy of quantum spin liquids
• Nature of the randomness-induced quantum spin liquids in two dimensions
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• Charge density waves in electron-doped molybdenum disulfide
• Realization of metallic state in 1T-TaS2 with persisting long-range order of charge density wave
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• Coupling between Charge, Lattice, Orbital, and Spin in a Charge Density Wave of 1$T$-TaS${}_2$
• Finite-temperature properties of the extended Heisenberg model on a triangular lattice
• Photo-induced nonequilibrium states in Mott insulators
• Thermodynamic properties of an $S=1/2$ ring-exchange model on the triangular lattice
• Magnetic and spin-liquid phases in the frustrated $t-t^{\prime }$ Hubbard model on the triangular lattice
• Spin-orbit and exchange proximity couplings in graphene/1T-TaS${}_2$ heterostructure triggered by a charge density wave
• Stacking effect and Coulomb correlation in layered charge density wave phase of 1T-NbS2
• Competition of Spinon Fermi Surface and Heavy Fermi Liquids states from the Periodic Anderson to the Hubbard model
• Vanishing Wilson ratio as the hallmark of quantum spin-liquid models
• Recent progress on magnetic-field studies on quantum-spin-liquid candidates
• Robust atomic orbital in the cluster magnet LiMoO2
• Artificial heavy fermions in a van der Waals heterostructure
• Spectroscopic evidence for possible quantum spin liquid behavior in a two-dimensional Mott insulator
• Similarity of thermodynamic properties of Heisenberg model on triangular and kagome lattices
• Effect of quenched disorder on a quantum spin liquid state of triangular-lattice antiferromagnet 1T-TaS${}_2$
• Renormalization of the Mott gap by lattice entropy: The case of 1T-TaS2
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• Possible glass-like random singlet magnetic state in 1T-TaS2
• Friction Anomalies at First-Order Transition Spinodals: 1T-TaS${}_2$
• Lattice-Driven Chiral Charge Density Wave State in 1T-TaS${}_2$
• Understanding the magnetic response of the Quantum spin liquid compound 1T-TaS2
• Drag resistance mediated by quantum spin liquids
• Generating Two-dimensional Ferromagnetic Charge Density Waves via External Fields
• Centrosymmetric-noncentrosymmetric Structural Phase Transition in Quasi one-dimensional compound, (TaSe${}_4$)${}_3$I
• Self-doped flat band and spin-triplet superconductivity in monolayer 1T-TaSe${}_{2-x}$Te${}_x$
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• Identifying materials with charge-spin physics using charge-spin susceptibility computed from first principles
• Quantum Phases and Spin Liquid Properties of 1T-TaS2
• Effect of Interlayer Stacking on the Electronic Properties of 1$T$-TaS${}_2$
• Topical review: the nature of the ground state and possibility of a quantum spin liquid in 1T metal dichalcogenides
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• Triplet resonating valence bond theory and transition metal chalcogenides
• Emergent quantum phenomena in two-dimensional 1T-TaS2