Conservation of chirality at a junction between two Weyl semimetals
arXiv:2106.02462 · doi:10.1103/PhysRevB.104.125308
Abstract
In Weyl semimetals the location of linear band crossings, the Weyl cones, is not bound to any high symmetry point of the Brillouin zone, unlike the Dirac nodes in graphene. This flexibility is advantageous for valleytronics, where information is encoded in the valleys of the band structure when intervalley scattering is weak. However, if numerous Weyl cones coexist the encoded information can decohere rapidly because of band mixing. Here, we investigate how the helical iso-spin texture of Weyl cones affects valleytronics in heterojunctions of Weyl materials, and show how the chirality of this iso-spin texture can serve to encode information.
arXiv comment13 pages, 7 figures ; supplementary material included
References in corpus (39)
- Spintronics: Fundamentals and applications
- Control of valley polarization in monolayer MoS2 by optical helicity
- Valley polarization in MoS2 monolayers by optical pumping
- Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
- Experimental discovery of Weyl semimetal TaAs
- Valley filter and valley valve in graphene
- Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
- Discovery of a Weyl Fermion semimetal state in NbAs
- Evidence of Klein tunneling in graphene p-n junctions
- Detecting Topological Currents in Graphene Superlattices
- Topological quantum properties of chiral crystals
- Multiple types of topological fermions in transition metal silicides
- Experimental discovery of a topological Weyl semimetal state in TaP
- Evidence of the role of contacts on the observed electron-hole asymmetry in graphene
- 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
- Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi
- Chiral Topological Semimetal with Multifold Band Crossings and Long Fermi arcs
- Recipes for spin-based quantum computing
- Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi
- Valleytronics in merging Dirac cones: All-electric-controlled valley filter, valve and universal reversible logic gate
- Direct Observation of Nonequivalent Fermi-Arc States of Opposite Surfaces in Noncentrosymmetric Weyl Semimetal NbP
- Contact resistance and shot noise in graphene transistors
- Floquet-Engineered Valleytronics in Dirac Systems
- Quantum limit transport and destruction of the Weyl nodes in TaAs
- Linear and nonlinear optical responses in the chiral multifold semimetal RhSi
- Optical signatures of multifold fermions in the chiral topological semimetal CoSi
- Photoninduced Weyl half-metal phase and spin filter effect from topological Dirac semimetals
- Ultraquantum magnetoresistance in single-crystalline -AgSe
- Ultraquantum magnetoresistance in Kramers Weyl semimetal candidate -Ag2Se
- Comprehensive scan for nonmagnetic Weyl semimetals with nonlinear optical response
- Boundary Conditions and Surface States Spectra in Topological Insulators
- Electrically tunable valley polarization in Weyl semimetals with tilted energy dispersion
- Surface States of a System of Dirac Fermions: A Minimal Model
- Conductance modulation in Weyl semimetals with tilted energy dispersion without a band gap
- Anomalous tunneling characteristic of Weyl semimetals with tilted energy dispersion
- Fermi arcs formation in Weyl semimetals: the key role of intervalley interaction
- Large Fermi-arc and robust Weyl semimetal phase in AgS