Edge states in a two-dimensional nonsymmorphic semimetal
| Autor: | Dganit Meidan, D. B. Gutman, D. N. Aristov, P. G. Matveeva |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Condensed Matter - Mesoscale and Nanoscale Physics Graphene Point reflection Dirac (software) FOS: Physical sciences 02 engineering and technology Type (model theory) 021001 nanoscience & nanotechnology 01 natural sciences Semimetal law.invention law Quantum mechanics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Homogeneous space 010306 general physics 0210 nano-technology Fermi Gamma-ray Space Telescope Surface states |
| Zdroj: | Physical Review B. 99 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | Dirac materials have unique transport properties, partly due to the presence of surface states. A new type of Dirac materials, protected by non-symmorphic symmetries was recently proposed by Young and Kane [1]. By breaking of time reversal or inversion symmetry one can split the Dirac cones into Weyl nodes. The later are characterized by local Chern numbers, that makes them two-dimensional analogs of Weyl semimetals. We find that the formation of the Weyl nodes is accompanied by an emergence of one-dimensional surface states, similar to Fermi arcs in Weyl semimetals and edge states in two-dimensional graphene. We explore these states for a quasi-one-dimensional non-symmorphic ribbon. The type and strength of applied deformation control the location and Weyl nodes and their composition. This determines the properties of emerging edge states. The sensitivity of these edge states to the external deformations makes non-symmorphic materials potentially useful as a new type of electromechanical sensors. Comment: 9 pages, 8 figures |
| Databáze: | OpenAIRE |
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