Noncentrosymmetric two-dimensional Weyl semimetals in porous Si/Ge structures
arXiv:2305.05756 · doi:10.1088/1361-648X/ad1e09
Abstract
In this work we predict a family of noncentrosymmetric two-dimensional (2D) Weyl semimetals composed by porous Ge and SiGe structures. These systems are energetically stable graphenylene-like structures with a buckling, spontaneously breaking the inversion symmetry. The nontrivial topological phase for these 2D systems occurs just below the Fermi level, resulting in nonvanishing Berry curvature around the Weyl nodes. The emerged Weyl semimetals are protected by symmetry, presenting one-dimensional edge Fermi-arcs connecting Weyl points with opposite chiralities. Our findings complete the family of Weyl in condensed-matter physics, by predicting the first noncentrosymmetric class of 2D Weyl semimetals.
References in corpus (32)
- Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
- WannierTools: An open-source software package for novel topological materials
- Weyl Semimetal in a Topological Insulator Multilayer
- Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
- Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
- Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
- Low-energy effective Hamiltonian involving spin-orbit coupling in Silicene and Two-Dimensional Germanium and Tin
- Experimental observation of Weyl points
- Observation of Weyl nodes in TaAs
- Discovery of a Weyl Fermion semimetal state in NbAs
- Topological response in Weyl semimetals and the chiral anomaly
- Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
- Computing topological invariants without inversion symmetry
- Topological quantum properties of chiral crystals
- Experimental discovery of a topological Weyl semimetal state in TaP
- Observation of Weyl nodes and Fermi arcs in TaP
- Weyl Metals
- Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP
- A Nonzero Gap Two-Dimensional Carbon Allotrope from Porous Graphene
- Two-dimensional Weyl Half Semimetal and Tunable Quantum Anomalous Hall Effect in Monolayer PtCl
- Dispersion of Fermi arcs in Weyl semimetals and their evolutions to Dirac cones
- Ideal Weyl semimetals in the chalcopyrites CuTlSe2, AgTlTe2, AuTlTe2 and ZnPbAs2
- Dirac and Weyl Materials: Fundamental Aspects and Some Spintronics Applications
- Ferromagnetic hybrid nodal loop and switchable type-I and type-II Weyl fermions in two-dimension
- Quantized Thermoelectric Hall Effect Induces Giant Power Factor in a Topological Semimetal
- Coulomb interaction effect in tilted Weyl fermion in two dimensions
- Do the surface Fermi arcs in Weyl semimetals survive disorder?
- Fingerprints of the conformal anomaly on the thermoelectric transport in Dirac and Weyl semimetals: Result from a Kubo formula
- Topological Phase Transitions and a Two-Dimensional Weyl Superconductor in a Half-Metal/Superconductor Heterostructure
- Superconductivity in Weyl semimetals in a strong pseudomagnetic field