Gapless excitations in the ground state of 1T-TaS${}_2$

Abstract

1T-TaS${}_2$ is a layered transition metal dichalgeonide with a very rich phase diagram. At T=180K it undergoes a metal to Mott insulator transition. Mott insulators usually display anti-ferromagnetic ordering in the insulating phase but 1T-TaS${}_2$ was never shown to order magnetically. In this letter we show that 1T-TaS${}_2$ has a large paramagnetic contribution to the magnetic susceptibility but it does not show any sign of magnetic ordering or freezing down to 20mK, as probed by $\mu$SR, possibly indicating a quantum spin liquid ground state. Although 1T-TaS${}_2$ exhibits a strong resistive behavior both in and out-of plane at low temperatures we find a linear term in the heat capacity suggesting the existence of a Fermi-surface, which has an anomalously strong magnetic field dependence.

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Cited by in corpus (37)

• Experimental identification of quantum spin liquids
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• Direct identification of Mott Hubbard band pattern beyond charge density wave superlattice in monolayer 1T-NbSe2
• Magnetic memory and spontaneous vortices in a van der Waals superconductor
• Distinguishing a Mott Insulator from a Trivial Insulator with Atomic Adsorbates
• Phase diagram of the anisotropic triangular lattice Hubbard model
• Molecular Quantum Materials: Electronic Phases and Charge Dynamics in Two-Dimensional Organic Solids
• Experimental signatures of quantum and topological states in frustrated magnetism
• Chiral to Nematic Crossover in the Superconducting State of 4Hb-TaS${}_2$
• Out-of-plane transport of 1T-TaS2/graphene-based van der Waals heterostructures
• Realization of metallic state in 1T-TaS2 with persisting long-range order of charge density wave
• Kitaev Quantum Spin Liquids
• Spin-liquid insulators can be Landau's Fermi liquids
• Evidence of a two-component order parameter in 4Hb-TaS2 in the Little-Parks effect
• Probing the Quantum Noise of the Spinon Fermi Surface with NV Centers
• Unquantized thermal Hall effect in quantum spin liquids with spinon Fermi surfaces
• Stacking effect and Coulomb correlation in layered charge density wave phase of 1T-NbS2
• Probing quantum spin liquids with a quantum twisting microscope
• Competition of Spinon Fermi Surface and Heavy Fermi Liquids states from the Periodic Anderson to the Hubbard model
• Robust Gapless Superconductivity in 4Hb-TaS${}_2$
• Honeycomb-Lattice Mott insulator on Tantalum Disulphide
• Mobile Kink Solitons in a Van der Waals Charge-Density-Wave Layer
• Spectroscopic evidence for possible quantum spin liquid behavior in a two-dimensional Mott insulator
• Instability of the $U(1)$ spin liquid with a large spinon Fermi surface in the Heisenberg-ring exchange model on the triangular lattice
• Kondo enabled transmutation between spinons and superconducting vortices: origin of magnetic memory in 4Hb-$\mathrm{Ta}{\mathrm{S}}_2$
• Understanding the magnetic response of the Quantum spin liquid compound 1T-TaS2
• Drag resistance mediated by quantum spin liquids
• Revealing spinons by proximity effect
• Stabilization of antiferromagnetism in 1T-Fe${}_{0.05}$TaS${}_2$
• Tunneling spectroscopy of the spinon-Kondo effect in one-dimensional Mott insulators
• Topical review: the nature of the ground state and possibility of a quantum spin liquid in 1T metal dichalcogenides
• Exact diagonalization study of triangular Heisenberg model with four-spin ring-exchange interaction
• Charge Density Waves beyond the Pauli paramagnetic limit in 2D systems
• Emergent quantum phenomena in two-dimensional 1T-TaS2
• Triplet resonating valence bond theory and transition metal chalcogenides