| Autor: |
Crasto de Lima F; Instituto de Física , Universidade Federal de Uberlândia , C.P. 593, 38400-902 , Uberlândia , MG Brazil., Ferreira GJ; Instituto de Física , Universidade Federal de Uberlândia , C.P. 593, 38400-902 , Uberlândia , MG Brazil., Miwa RH; Instituto de Física , Universidade Federal de Uberlândia , C.P. 593, 38400-902 , Uberlândia , MG Brazil. |
| Jazyk: |
angličtina |
| Zdroj: |
Nano letters [Nano Lett] 2019 Sep 11; Vol. 19 (9), pp. 6564-6568. Date of Electronic Publication: 2019 Aug 22. |
| DOI: |
10.1021/acs.nanolett.9b02802 |
| Abstrakt: |
Recently, orbital-textures have been found in Rashba and topological insulator (TI) surface states as a result of the spin-orbit coupling (SOC). Here, we predict a p x /p y orbital texture, in linear dispersive Dirac bands, arising at the K / K ' points of χ- h 0 borophene chiral monolayer. Combining "first-principles" calculations with effective Hamiltonians, we show that the orbital pseudospin has its direction locked with the momentum in a similar way as TIs' spin-textures. Additionally, considering a layer pseudospin degree of freedom, this lattice allows stackings of layers with equivalent or opposite chiralities. In turn, we show a control of the orbital textures and layer localization through the designed stacking and external electric field. For instance, for the opposite chirality stacking, the electric field allows for an on/off switch of the orbital-textured Dirac cone. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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