Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe${}_2$

Abstract

Topological semimetals have recently attracted extensive research interests as host materials to condensed matter physics counterparts of Dirac and Weyl fermions originally proposed in high energy physics. These fermions with linear dispersions near the Dirac or Weyl points obey Lorentz invariance, and the chiral anomaly leads to novel quantum phenomena such as negative magnetoresistance. The Lorentz invariance is, however, not necessarily respected in condensed matter physics, and thus Lorentz-violating type-II Dirac fermions with strongly tilted cones can be realized in topological semimetals. Here, we report the first experimental evidence of type-II Dirac fermions in bulk stoichiometric PtTe${}_2$ single crystal. Angle-resolved photoemission spectroscopy (ARPES) measurements and first-principles calculations reveal a pair of strongly tilted Dirac cones along the $\Gamma$-A direction under the symmetry protection, confirming PtTe${}_2$ as a type-II Dirac semimetal. The realization of type-II Dirac fermions opens a new door for exotic physical properties distinguished from type-I Dirac fermions in condensed matter materials.

12 pages, 4 figures

References in corpus (14)

• Classification of stable three-dimensional Dirac semimetals with nontrivial topology
• Spectroscopic evidence for type II Weyl semimetal state in MoTe2
• Observation of the Type-II Weyl Semimetal Phase in MoTe2
• Structure determination and coexistence of superconductivity and antiferromagnetic order in (Li0.8Fe0.2)OHFeSe
• Type-II Dirac fermions in the PtSe${}_2$ class of transition metal dichalcogenides
• Predicted Unusual Magnetoresponse in Type-II Weyl Semimetals
• Fermi arcs and their topological character in the candidate type-II Weyl semimetal MoTe2
• Nontrivial Berry phase and type II Dirac transport in layered material PdTe2
• Magnetic breakdown and Klein tunneling in a type-II Weyl semimetal
• Direct observation of local Rashba spin polarization and spin-layer locking in centrosymmetric monolayer PtSe${}_2$
• Low energy excitations in graphite: The role of dimensionality and lattice defects
• Electronic Evidence for Type II Weyl Semimetal State in MoTe2
• Discovery of Weyl semimetal state violating Lorentz invariance in MoTe2
• Effect of strong localization of doped holes in angle-resolved photoemission spectra of La${}_{1-x}$Sr${}_x$FeO${}_3$

Cited by in corpus (137)

• Light-induced emergent phenomena in 2D materials and topological materials
• Experimental evidence of type-II Dirac fermions in PtSe2
• Ubiquitous formation of bulk Dirac cones and topological surface states from a single orbital manifold in transition-metal dichalcogenides
• Topological Materials Discovery from Crystal Symmetry
• High-pressure synthesis of Dirac materials: layered van der Waals bonded BeN${}_4$ polymorph
• Nanoelectromechanical Sensors based on Suspended 2D Materials
• Fermiology and Superconductivity of Topological Surface States in PdTe${}_2$
• Non-topological Origin of the Planar Hall Effect in Type-II Dirac Semimetal NiTe2
• Black Hole Horizon in a Type-III Dirac Semimetal Zn${}_2$In${}_2$S${}_5$
• Type I superconductivity in the Dirac semimetal PdTe2
• The Optical Properties and Plasmonics of Anisotropic 2-Dimensional Materials
• Low-energy type-II Dirac fermions and spin-polarized topological surface states in transition-metal dichalcogenide NiTe${}_2$
• Low-Temperature Eutectic Synthesis of PtTe2 with Weak Antilocalization and Controlled Layer Thinning
• Planar Hall effect in type II Dirac semimetal VAl${}_3$
• Hybrid Dirac Semimetal in CaAgBi Materials Family
• Multipurpose and Reusable Ultrathin Electronic Tattoos Based on PtSe2 and PtTe2
• Nonlinear Topological Valley Hall Edge States Arising from Type-II Dirac Cones
• A comprehensive review on topological superconducting materials and interfaces
• Observation of Negative THz Photoconductivity in Large Area Type-II Dirac Semimetal PtTe2
• From Type-II Triply Degenerate Nodal Points and Three-Band Nodal Rings to Type-II Dirac Points in Centrosymmetric Zirconium Oxide
• Detailed study on the Fermi surfaces of the type-II Dirac semimetallic candidates PdTe2 and PtTe2
• Crossover from 2D metal to 3D Dirac semimetal in metallic PtTe2 films with local Rashba effect
• Fermi-crossing Type-II Dirac fermions and topological surface states in NiTe2
• Approaching the Type-II Dirac Point and Concomitant Superconductivity in Pt-doping Stabilized Metastable 1T-phase IrTe2
• Manipulating type-I and type-II Dirac polaritons in cavity-embedded honeycomb metasurfaces
• A novel undamped gapless plasmon mode in tilted type-II Dirac semimetal
• Electron-phonon coupling, superconductivity and nontrivial band topology in NbN polytypes
• Intrinsic Nonlinear Hall Detection of the Néel Vector for Two-Dimensional Antiferromagnetic Spintronics
• Pressure-induced Superconductivity in the Three-component Fermion Topological Semimetal Molybdenum Phosphide
• Strain-engineering the topological type-II Dirac semimetal NiTe${}_2$
• Type-II Dirac photons at the metasurfaces
• Dynamic current-current susceptibility in 3D Dirac and Weyl semimetals
• $\beta$-CuI: a Dirac semimetal without surface Fermi arcs
• Type-I superconductivity in PdTe${}_2$ probed by $\mu$SR
• Two-dimensional antiferromagnetic Dirac fermions in monolayer TaCoTe${}_2$
• Ionic liquid gating induced self-intercalation of transition metal chalcogenides
• Low-temperature synthesis and electrocatalytic application of large-area PtTe2 thin films
• Two-dimensional type-II Dirac fermions in layered oxides
• Dirac semimetal phase in the hexagonal LiZnBi
• Topological Gapless Matters in Three-dimensional Ultracold Atomic Gases
• Experimental Progress on Layered Topological Semimetals
• Galvanomagnetic properties of the putative type-II Dirac semimetal PtTe${}_2$
• Magnetic Ordering, Anomalous Lifshitz Transition and Topological Grain Boundaries in Two-Dimensional Biphenylene Network
• Electron Transport in Dirac and Weyl Semimetals
• Fermions and bosons in nonsymmorphic PdSb2 with sixfold degeneracy
• Polarization tensor for tilted Dirac fermion materials: Covariance in deformed Minkowski spacetime
• A de Hass-van Alphen study of the Type-II Dirac semimetal candidates $A$Te${}_2$ ($A=$ Pt, Pd)
• Topological Dirac states in a layered telluride TaPdTe${}_5$ with quasi-one-dimensional PdTe${}_2$ chains
• Two-dimensional type-II Dirac fermions in a LaAlO3/LaNiO3/LaAlO3 quantum well
• Bulk Fermi surfaces of the Dirac type-II semimetallic candidate NiTe2
• Bulk Fermi surfaces of the Dirac Type-II Semimetallic Candidates VAl3, NbAl3 and TaAl3
• Pressure-induced Superconductivity and Topological Quantum Phase Transitions in the Topological Semimetal ZrTe2
• Superconductivity under pressure in the Dirac semimetal PdTe2
• Electrodynamics of tilted Dirac/Weyl materials: A unique platform for unusual surface plasmon polaritons
• Synthetic non-Abelian gauge fields and gravitomagnetic effects in tilted Dirac cone systems
• Current-Perpendicular-to-Plane Giant Magnetoresistance Effect in van der Waals Heterostructures
• Broadband excitation spectrum of bulk crystals and thin layers of PtTe${}_2$
• Dual quantum confinement and anisotropic spin splitting in the multi-valley semimetal PtSe${}_2$
• Enhanced superconductivity in bilayer PtTe${}_2$ by alkali-metal intercalations
• Penetration depth study of the type-I superconductor PdTe2
• Molecular Beam Epitaxy of a 2D material nearly lattice matched to a 3D substrate: $NiT{e}_2$ on $GaAs$
• Dirac semimetal PdTe2 temperature-dependent quasiparticle dynamics and electron-phonon coupling
• Type-II Dirac states in full Heusler compounds XInPd2 (X = Ti, Zr and Hf)
• Type-II topological metals
• A general route to form topologically-protected surface and bulk Dirac fermions along high-symmetry lines
• Observation of highly anisotropic bulk dispersion and spin-polarized topological surface states in CoTe2
• Giant Rashba splitting in PtTe/PtTe${}_2$ heterostructure
• Realization of Practical Eightfold Fermions and Fourfold van Hove Singularity in TaCo${}_2$Te${}_2$
• Giant magnetoresistance, Fermi surface topology, Shoenberg effect and vanishing quantum oscillations in type-II Dirac semimetal candidates MoSi${}_2$ and WSi${}_2$
• Condition for the emergence of a bulk Fermi arc in disordered Dirac-fermion systems
• The study on quantum material WTe2
• Seeded growth of high-quality transition metal dichalcogenide single crystals via chemical vapor transport
• Large spin Hall conductivity and excellent hydrogen evolution reaction activity in unconventional PtTe1.75 monolayer
• Controlling spin-orbit coupling to tailor type-II Dirac bands
• Emergent superconductivity by Re doping in type -II Weyl semimetal NiTe2
• Magnetotransport properties of the layered CaAl2Si2 semimetal hosting multiple nontrivial topological states
• Single Magnetic Impurity in Tilted Dirac Surface States
• Anisotropic fixed points in Dirac and Weyl semimetals
• Topologically Protected Wormholes in Type-III Weyl Semimetal Co${}_3$In${}_2$X${}_2$ (X = S, Se)
• Undamped transverse electric mode in undoped two-dimensional tilted Dirac cone materials
• Anomalous charge transport of superconducting Cu${}_x$PdTe${}_2$ under high pressure
• Massive fermions with low mobility in antiferromagnet orthorhombic CuMnAs single crystals
• Photonic Topological Transitions and Epsilon-Near-Zero Surface Plasmons in Type-II Dirac Semimetal NiTe${}_2$
• Magnetic hourglass fermions: from exhaustive symmetry conditions to high-throughput materials predictions
• On the renormalization of Coulomb interactions in two-dimensional tilted Dirac fermions
• Evidence for Two-dimensional Weyl Fermions in Air-Stable Monolayer PtTe${}_{1.75}$
• Tuning Dirac nodes with correlated d-electrons in BaCo_{1-x}Ni_{x}S_{2}
• Type-II Dirac photonic lattices
• Veselago focusing of anisotropic massless Dirac fermions
• Discovery of Ĉ${}_2$ rotation anomaly in topological crystalline insulator SrPb
• Mirror anomaly and anomalous Hall effect in type-I Dirac semimetals
• Interplay between tilt, disorder, and Coulomb interaction in type-I Dirac fermions
• Anisotropic positive linear and sub-linear magnetoresistivity in the cubic type-II Dirac metal Pd${}_3$In${}_7$
• Heat capacity of type I superconductivity in the Dirac semimetal PdTe${}_2$
• First-principles study on the electrical resistivity in zirconium dichalcogenides with multi-valley bands: mode-resolved analysis of electron-phonon scattering
• Topological Type-II Dirac Fermions Approaching the Fermi Level in a Transition Metal Dichalcogenide NiTe2
• GW effects on the topology of type-II Dirac cones in NiTe${}_2$, PtSe${}_2$ and PtTe${}_2$
• Exploring Native Atomic Defects in NiTe2
• Inversion symmetry breaking induced triply degenerate points in orderly arranged PtSeTe family materials
• Lieb lattices and pseudospin-1 dynamics under barrier- and well-like electrostatic interactions
• Observation of the Critical State to Multiple-Type Dirac Semimetal Phases in KMgBi
• Type-II Dirac line node in strained Na3N
• The phase diagram of a two-dimensional dirty tilted Dirac semimetal
• Disorder induced transition from type-I to type-II superconductivity in the Dirac semimetal PdTe${}_2$
• Chiral anomaly and positive longitudinal magnetoresistance in the type-II Dirac semimetals $A_x$PdTe${}_2$ (\textit{A} = Cu, Ag)
• 2D Weyl Materials in the Presence of Constant Magnetic Fields
• XFe4Ge2 (X = Y, Lu) and Mn3Pt: Filling-enforced magnetic topological metals
• Type-II Dirac cone and Dirac cone protected by nonsymmorphic symmetry in carbon-lithium compound (C4Li)
• Strong and Weak Three-Dimensional Topological Insulators Probed by Surface Science Methods
• Landau quantization in tilted Weyl semimetals with broken symmetry
• Probing mirror anomaly and classes of Dirac semimetals with circular dichroism
• Landau levels and snake states of pseudo-spin-1 Dirac-like electrons in gapped Lieb lattices
• Topologically Protected Doubling of Tilted Dirac Fermions in Two Dimensions
• Shubnikov-de Haas oscillations and planar Hall effect in HfTe2
• $\mathcal{P}\mathcal{T}$-symmetric photonic lattices with type-II Dirac cones
• Magneto-optical evidence of tilting effect in coupled Weyl bands
• Scattering makes a difference in circular dichroic angle-resolved photoemission
• Layered Topological Antiferromagnetic Metal at Room Temperature -- YbMn${}_2$Ge${}_2$
• Collective plasmonic modes in the chiral multifold fermionic material CoSi
• Singular low-energy states of tilted Dirac semimetals induced by the fermion-fermion interactions
• Spin-orbital mixing in the topological ladder of the two-dimensional metal PtTe${}_2$
• Multiband Quantum Materials
• First-principles study of the electronic structure of CaKRu${}_4$P${}_4$
• Quantum Criticality of Type-I and Critically Tilted Dirac Semimetals
• Materials and possible mechanisms of extremely large magnetoresistance: A review
• Strain-induced topological phase transition in two-dimensional platinum ditelluride
• The possible coexistence of superconductivity and topological electronic states in 1T-RhSeTe
• Critical fates induced by the interaction competition in three-dimensional tilted Dirac semimetals
• Dirac Nodal Lines and Tilted Semi-Dirac Cones Coexisting in a Striped Boron Sheet
• Designer three-dimensional electronic bands in asymmetric transition metal dichalcogenide heterostructures
• Transport properties of semimetallic transition metal dichalcogenides
• Signature of topological crystalline insulating behavior in new B2X2Zn (X=Ir, Rh, Co) compound from first-principles Computation
• Electronic and topological properties of the van der Waals layered superconductor PtTe
• Impact of the out-of-plane conductivity on spin transport evaluation in a van der Waals material
• Fermionic Casimir effect in the presence of compact dimension in field theory with Lorentz invariance violation
• Nonlinear optical response of Type-II Weyl fermions in two dimensions
• Crystalline symmetry-protected non-trivial topology in prototype compound BaAl${}_4$