Composition and stacking dependent topology in bilayers from the graphene family

Popescu, Adrian; Rodriguez-Lopez, Pablo; Woods, Lilia M.

doi:10.1103/physrevmaterials.3.064002

Title: Composition and stacking dependent topology in bilayers from the graphene family

Journal Article · Fri Jun 21 00:00:00 EDT 2019 · Physical Review Materials

DOI:https://doi.org/10.1103/physrevmaterials.3.064002· OSTI ID:1609728

Popescu, Adrian ^[1]; Rodriguez-Lopez, Pablo ^[2]; Woods, Lilia M. ^[1]

Univ. of South Florida, Tampa, FL (United States)
Instituto de Ciencia de Materiales de Madrid (ICMM), Madrid (Spain); GISC-Grupo Interdisciplinar de Sistemas Complejos, Madrid (Spain)

We present a compositional and structural investigation of silicene, germanene, and stanene bilayers from first principles. Due to the staggering of the individual layers, several stacking patterns are possible, most of which are not available to the bilayer graphene. This structural variety, in conjunction with the presence of the spin-orbit coupling, unveils a diversity of the electronic properties, with the appearance of distinct band features, including orbital hybridization and band inversion. Here, we show that for particular cases, the intrinsic spin Hall response exhibits signatures of nontrivial electronic band topology, making these structures promising candidates to probe Dirac-like physics.

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Research Organization:: Univ. of South Florida, Tampa, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-06ER46297

OSTI ID:: 1609728

Alternate ID(s):: OSTI ID: 1528665

Journal Information:: Physical Review Materials, Vol. 3, Issue 6; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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