Quantum Hall Effect of Weyl Fermions in Semiconducting n-type Tellurene

Abstract

Dirac and Weyl nodal materials can host low-energy relativistic quasiparticles. Under strong magnetic fields, the topological properties of Dirac/Weyl materials can directly manifest through quantum Hall states. However, most Dirac/Weyl nodes generically exist in semimetals without exploitable bandgaps due to their accidental band-crossing origin. Here we report the first experimental observation of Weyl fermions in a semiconductor. Tellurene, the 2D form of tellurium, possesses chiral crystal structure which induces unconventional Weyl nodes with a hedgehog-like radial spin texture near the conduction band edge. We synthesize high-quality n-type tellurene by a hydrothermal method with subsequent dielectric doping and detect a topologically non-trivial pi Berry phase in quantum Hall sequences. Our work expands the spectrum of Weyl matter into semiconductors and offers a new platform to design novel quantum devices by marrying the advantages of topological materials to versatile semiconductors.

arXiv comment5 figures for main text; 8 figures for supporting information

References in corpus (29)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Topological Insulator Materials
• Unconventional Integer Quantum Hall effect in graphene
• High Electron Mobility, Quantum Hall Effect and Anomalous Optical Response in Atomically Thin InSe
• Field-effect transistors made from solution-grown two-dimensional tellurene
• Large bulk resistivity and surface quantum oscillations in the topological insulator Bi2Te2Se
• Topological quantum properties of chiral crystals
• Quantum Hall Effect in Black Phosphorus Two-dimensional Electron Gas
• Discovery of Weyl fermion semimetals and topological Fermi arc states
• 1D van der Waals Material Tellurium: Raman Spectroscopy under Strain and Magneto-transport
• Discovery of topological chiral crystals with helicoid arc states
• New classes of chiral topological nodes with non-contractible surface Fermi arcs in CoSi
• Weyl Node and Spin Texture in Trigonal Tellurium and Selenium
• Shubnikov-de Haas oscillations of high mobility holes in monolayer and bilayer WSe${}_2$: Landau level degeneracy, effective mass, and negative compressibility
• Quantum Oscillations in a Topological Insulator Bi${}_2$Te${}_2$Se with Large Bulk Resistivity (6 $\Omega$cm)
• Gyrotropic effects in trigonal tellurium studied from first principles
• Interactions and magnetotransport through spin-valley coupled Landau levels in monolayer MoS${}_2$
• Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe${}_2$
• Role of pseudospin in quasiparticle interferences in epitaxial graphene probed by high-resolution scanning tunneling microscopy
• Observation of Valley Zeeman and Quantum Hall Effects at Q Valley of Few-Layer Transition Metal Disulfides
• Quantum Transport and Band Structure Evolution under High Magnetic Field in Few-Layer Tellurene
• Band splitting and Weyl nodes in trigonal tellurium studied by angle-resolved photoemission spectroscopy and density functional theory
• Integer and Fractional Quantum Hall effect in Ultra-high Quality Few-layer Black Phosphorus Transistors
• Pancharatnam-Berry phase and kinetic magnetoelectric effect in a three-dimensional helical crystal (Te)
• Odd-integer quantum Hall states and giant spin susceptibility in p-type few-layer WSe2
• Gate-tunable Strong Spin-orbit Interaction in Two-dimensional Tellurium Probed by Weak-antilocalization
• Imaging Carrier Inhomogeneities in Ambipolar Tellurene Field Effect Transistors

Cited by in corpus (18)

• Topological Materials Discovery from Crystal Symmetry
• Gate-tuneable and chirality-dependent charge-to-spin conversion in Tellurium nanowires
• Ultrafast Photoinduced Band Splitting and Carrier Dynamics in Chiral Tellurium Nanosheets
• Quantum Hall phase in graphene engineered by interfacial charge coupling
• Tunable Chirality-dependent Nonlinear Electrical Responses in 2D Tellurium
• Tunable Circular Photogalvanic and Photovoltaic Effect in 2D Tellurium with Different Chirality
• The discovery of three-dimensional Van Hove singularity
• Optoelectronic manifestation of orbital angular momentum driven by chiral hopping in helical Se chains
• Even-integer Quantum Hall Effect in an Oxide Caused by Hidden Rashba Effect
• Two-dimensional Dirac semiconductor and its material realization
• Terahertz radiation driven nonlinear transport phenomena in two-dimensional tellurene
• Intrinsic Orbital Origin for the Chirality-Dependent Nonlinear Planar Hall Effect of Topological Nodal Fermions in Chiral Crystals
• Phonon Edelstein effect in chiral metals
• Coherently Coupled Carrier and Phonon Dynamics in Elemental Tellurium Probed by XUV Transient Absorption
• Field manipulation of Weyl modes in an ideal Dirac semimetal
• Coexistence of Logarithmic and SdH Quantum Oscillations in Ferromagnetic Cr-doped Tellurium Single Crystals
• van der Waals Nanoreactors
• Bilayer Quantum Hall States in an n-type Wide Tellurium Quantum Well