Robust Luttinger liquid state of 1D Dirac fermions in a van der Waals system Nb${}_9$Si${}_4$Te${}_{18}$

Abstract

We report on the Tomonaga-Luttinger liquid (TLL) behavior in fully degenerate 1D Dirac fermions. A ternary van der Waals material Nb${}_9$Si${}_4$Te${}_{18}$ incorporates in-plane NbTe${}_2$ chains, which produce a 1D Dirac band crossing Fermi energy. Tunneling conductance of electrons confined within NbTe2 chains is found to be substantially suppressed at Fermi energy, which follows a power law with a universal temperature scaling, hallmarking a TLL state. The obtained Luttinger parameter of ~0.15 indicates strong electron-electron interaction. The TLL behavior is found to be robust against atomic-scale defects, which might be related to the Dirac electron nature. These findings, as combined with the tunability of the compound and the merit of a van der Waals material, offer a robust, tunable, and integrable platform to exploit non-Fermi liquid physics.

References in corpus (26)

• Chiral tunneling and the Klein paradox in graphene
• Luttinger Liquid Behavior in Carbon Nanotubes
• One dimensional Bosons: From Condensed Matter Systems to Ultracold Gases
• Dirac materials
• One-Dimensional Quantum Liquids: Beyond the Luttinger Liquid Paradigm
• Probing spin-charge separation in a Tomonaga-Luttinger liquid
• On-chain electrodynamics of metallic (TMTSF)_2 X salts: Observation of Tomonaga-Luttinger liquid response
• Observation of a Helical Luttinger-Liquid in InAs/GaSb Quantum Spin Hall Edges
• Electron Transport in a Multi-Channel One-Dimensional Conductor: Molybdenum Selenide Nanowires
• Fractionalized Wave Packets from an Artificial Tomonaga-Luttinger Liquid
• One-Dimensional Luttinger Liquids in a Two-Dimensional Moiré Lattice
• Tomonaga-Luttinger liquid in the edge channels of a quantum spin Hall insulator
• Real Space Imaging of One-Dimensional Standing Waves: Direct Evidence for a Luttinger Liquid
• Boundary Effects on Spectral Properties of Interacting Electrons in One Dimension
• Observation of Quantum Criticality and Luttinger Liquid in One-dimensional Bose Gases
• Tomonaga-Luttinger liquid in a box: electrons confined within MoS${}_2$ mirror twin boundaries
• Imaging gate-tunable Tomonaga-Luttinger liquids in 1H-MoSe${}_2$ mirror twin boundaries
• Unexpectedly robust protection from backscattering in the topological insulator Bi${}_{1.5}$Sb${}_{0.5}$Te${}_{1.7}$Se${}_{1.3}$
• Attractive Tomonaga-Luttinger Liquid in a Quantum Spin Ladder
• Multiband one-dimensional electronic structure and spectroscopic signature of Tomonoga-Luttinger liquid behavior in K${}_2$Cr${}_3$As${}_3$
• Surface Tomonaga-Luttinger liquid state on Bi/InSb(001)
• Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order
• Atomic scale variation of electron tunneling into a Luttinger liquid ? : High resolution scanning tunneling spectroscopy study on Au/Ge(001)
• Quantum spin Hall edge states and interlayer coupling in twisted-bilayer WTe${}_2$
• Electronic structure and signature of Tomonaga-Luttinger liquid state in epitaxial CoSb${}_{1-x}$ nanoribbons
• Tomonaga Luttinger liquid in the topological edge channel of multilayer FeSe