Crystal growth and quantum oscillations in the topological chiral semimetal CoSi
arXiv:1904.00630 · doi:10.1103/PhysRevB.100.045104
Abstract
We survey the electrical transport properties of the single-crystalline, topological chiral semimetal CoSi which was grown via different methods. High-quality CoSi single crystals were found in the growth from tellurium solution. The sample's high carrier mobility enables us to observe, for the first time, quantum oscillations (QOs) in its thermoelectrical signals. Our analysis of QOs reveals two spherical Fermi surfaces around the R point in the Brillouin zone corner. The extracted Berry phases of these electron orbits are consistent with the -2 chiral charge as reported in DFT calculations. Detailed analysis on the QOs reveals that the spin-orbit coupling induced band-splitting is less than 2 meV near the Fermi level, one order of magnitude smaller than our DFT calculation result. We also report the phonon-drag induced large Nernst effect in CoSi at intermediate temperatures.
References in corpus (41)
- Topological Insulators
- Topological insulators and superconductors
- Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
- Topological Materials: Weyl Semimetals
- Experimental discovery of Weyl semimetal TaAs
- Topological Insulator Materials
- Titanic Magnetoresistance in WTe2
- Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
- Topological Semimetals
- Quantum transport evidence for a three-dimensional Dirac semimetal phase in Cd3As2
- Topological quantum properties of chiral crystals
- Multiple types of topological fermions in transition metal silicides
- Large Fermi Arcs in Unconventional Weyl Semimetal RhSi
- Discovery of topological chiral crystals with helicoid arc states
- New classes of chiral topological nodes with non-contractible surface Fermi arcs in CoSi
- Weyl Semimetals, Fermi Arcs and Chiral Anomalies (A Short Review)
- Double Dirac Semimetals in Three Dimensions
- Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi
- Weyl Metals
- Triple Point Topological Metals
- Topological Semimetals with Triply Degenerate Nodal Points in θ-phase Tantalum Nitride
- Nernst effect in metals and superconductors: a review of concepts and experiments
- Existence of bulk chiral fermions and crystal symmetry
- Dirac, Majorana and Weyl fermions
- Tantalum Monoarsenide: an Exotic Compensated Semimetal
- Electron scattering in tantalum monoarsenide
- New fermions on the line in topological symmorphic metals
- Rules for Phase Shifts of Quantum Oscillations in Topological Nodal-line Semimetals
- Magnetic tunneling induced Weyl node annihilation in TaP
- Nernst effect in semi-metals: the meritorious heaviness of electrons
- Band structure and unconventional electronic topology of CoSi
- Thermoelectric quantum oscillations in ZrSiS
- Rarita-Schwinger-Weyl semimetal in Jeff=3/2 electron systems
- Semimetal with both Rarita-Schwinger-Weyl and Weyl excitations
- Type-II Weyl Points in Three-Dimensional Cold Atom Optical Lattices
- Magnetothermoelectric properties of Bi2Se3
- Pseudospin 3/2 Fermions, Type-II Weyl Semimetals and Critical Weyl Semimetals in Tricolor Cubic Lattice
- Signature of chiral fermion instability in the Weyl semimetal TaAs above the quantum limit
- Quantum oscillations in the non-centrosymmetric superconductor and topological nodal-line semimetal PbTaSe
- The effect of energy-dependent electron scattering on thermoelectric transport in novel topological semimetal CoSi
- Thermoelectric power quantum oscillations in the ferromagnet UGe
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- Quasi-symmetry protected topology in a semi-metal
- Intrinsic negative magnetoresistance from the chiral anomaly of multifold fermions
- Quantum oscillations revealing topological band in kagome metal ScV6Sn6
- Network of topological nodal planes, multifold degeneracies, and Weyl points in CoSi
- Chirality locking charge density waves in a chiral crystal
- Spin Hall effect in a spin-1 chiral semimetal
- Quantum Oscillations of the Quasiparticle Lifetime in a Metal
- Chiral Dirac fermion in a collinear antiferromagnet
- Hierarchy of quasi-symmetries and degeneracies in chiral crystal materials CoSi
- Quantum oscillations and electronic structure in the large-Chern number topological chiral semimetal PtGa
- Quantum oscillations and electronic structures in large Chern number semimetal RhSn
- Magnetoresistance and Kohler rule in the topological chiral semimetals CoSi
- Theoretical study of topological properties of ferromagnetic pyrite CoS
- Strain-induced topological charge control in multifold fermion systems
- Chiral Floquet Engineering on Topological Fermions in Chiral Crystals
- Fermi surface of the chiral topological semimetal CoSi
- Shubnikov-de Haas and de Haas-van Alphen oscillation in Czochralski grown CoSi single crystal
- Electronic correlations effect on nontrivial topological fermions in CoSi
- Quantum oscillations and weak anisotropic resistivity in the chiral Fermion semimetal PdGa
- Electrical conductivity and screening effect of spin-1 chiral fermions scattered by charged impurities
- Band Curvature Effects on Quantum Transport of Spin-1 Chiral Fermion Systems
- Physical properties of RhGe and CoGe single crystals synthesized under high pressure
- Design Principles for Topological Thermoelectrics