Show simple item record

dc.creatorTopalović, Dušan B.
dc.creatorArsoski, Vladimir V.
dc.creatorTadić, Milan Ž.
dc.creatorPeeters, Francois M.
dc.date.accessioned2021-09-23T10:23:11Z
dc.date.available2021-09-23T10:23:11Z
dc.date.issued2020
dc.identifier.issn0021-8979
dc.identifier.urihttps://vinar.vin.bg.ac.rs/handle/123456789/9616
dc.description.abstractWe investigate the electron states in double asymmetric HgTe / Cd x Hg 1 - x Te quantum wells grown along the [001] direction. The subbands are computed by means of the envelope function approximation applied to the eight-band Kane k ⋅ p model. The asymmetry of the confining potential of the double quantum wells results in a gap opening, which is absent in the symmetric system where it can only be induced by an applied electric field. The bandgap and the subbands are affected by spin-orbit coupling, which is a consequence of the asymmetry of the confining potential. The electron-like and hole-like states are mainly confined in different quantum wells, and the enhanced hybridization between them opens a spin-dependent hybridization gap at a finite in-plane wavevector. We show that both the ratio of the widths of the two quantum wells and the mole fraction of the C d x H g 1 - x Te barrier control both the energy gap between the hole-like states and the hybridization gap. The energy subbands are shown to exhibit inverted ordering, and therefore, a nontrivial topological phase could emerge in the system. © 2020 Author(s).en
dc.relationMinistry of Education, Science and Technological Development of the Republic of Serbia
dc.relationFlemish Science Foundation (FWO-Vl)
dc.rightsrestrictedAccess
dc.sourceJournal of Applied Physics
dc.titleAsymmetric versus symmetric HgTe / Cd x Hg 1 - X Te double quantum wells: Bandgap tuning without electric fielden
dc.typearticleen
dc.rights.licenseARR
dcterms.abstractПеетерс, Францоис М.; Топаловић, Душан Б.; Тадић, Милан Ж.; Aрсоски, Владимир В.;
dc.citation.volume128
dc.citation.issue6
dc.identifier.wos000561339300001
dc.identifier.doi10.1063/5.0016069
dc.citation.rankM22
dc.type.versionpublishedVersion
dc.identifier.scopus2-s2.0-85089919204


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record