Structure of surface electronic states in strained mercury telluride
We present the theory describing the various surface electronic states arisen from the mixing of conduction and valence bands in a strained mercury telluride (HgTe) bulk material. We demonstrate that the strain-induced band gap in the Brillouin zone center of HgTe results in the surface states of tw...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ab1406 |
| _version_ | 1797750184476672000 |
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| author | O V Kibis O Kyriienko I A Shelykh |
| author_facet | O V Kibis O Kyriienko I A Shelykh |
| author_sort | O V Kibis |
| collection | DOAJ |
| description | We present the theory describing the various surface electronic states arisen from the mixing of conduction and valence bands in a strained mercury telluride (HgTe) bulk material. We demonstrate that the strain-induced band gap in the Brillouin zone center of HgTe results in the surface states of two different kinds. Surface states of the first kind exist in the small region of electron wave vectors near the center of the Brillouin zone and have the Dirac linear electron dispersion characteristic for topological states. The surface states of the second kind exist only far from the center of the Brillouin zone and have the parabolic dispersion for large wave vectors. The structure of these surface electronic states is studied both analytically and numerically in the broad range of their parameters, aiming to develop its systematic understanding for the relevant model Hamiltonian. The results bring attention to the rich surface physics relevant for topological systems. |
| first_indexed | 2024-03-12T16:29:02Z |
| format | Article |
| id | doaj.art-ffa08d4d5f9b46199f6200daa90f898d |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:29:02Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-ffa08d4d5f9b46199f6200daa90f898d2023-08-08T15:36:35ZengIOP PublishingNew Journal of Physics1367-26302019-01-0121404301610.1088/1367-2630/ab1406Structure of surface electronic states in strained mercury tellurideO V Kibis0https://orcid.org/0000-0003-3367-9980O Kyriienko1I A Shelykh2Department of Applied and Theoretical Physics, Novosibirsk State Technical University , Karl Marx Avenue 20, Novosibirsk 630073, Russia; Science Institute, University of Iceland IS-107 , Reykjavik, IcelandNORDITA, KTH Royal Institute of Technology and Stockholm University , Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden; ITMO University , Saint Petersburg 197101, RussiaScience Institute, University of Iceland IS-107 , Reykjavik, Iceland; ITMO University , Saint Petersburg 197101, RussiaWe present the theory describing the various surface electronic states arisen from the mixing of conduction and valence bands in a strained mercury telluride (HgTe) bulk material. We demonstrate that the strain-induced band gap in the Brillouin zone center of HgTe results in the surface states of two different kinds. Surface states of the first kind exist in the small region of electron wave vectors near the center of the Brillouin zone and have the Dirac linear electron dispersion characteristic for topological states. The surface states of the second kind exist only far from the center of the Brillouin zone and have the parabolic dispersion for large wave vectors. The structure of these surface electronic states is studied both analytically and numerically in the broad range of their parameters, aiming to develop its systematic understanding for the relevant model Hamiltonian. The results bring attention to the rich surface physics relevant for topological systems.https://doi.org/10.1088/1367-2630/ab1406topological insulatorsurface statesstrained HgTe |
| spellingShingle | O V Kibis O Kyriienko I A Shelykh Structure of surface electronic states in strained mercury telluride New Journal of Physics topological insulator surface states strained HgTe |
| title | Structure of surface electronic states in strained mercury telluride |
| title_full | Structure of surface electronic states in strained mercury telluride |
| title_fullStr | Structure of surface electronic states in strained mercury telluride |
| title_full_unstemmed | Structure of surface electronic states in strained mercury telluride |
| title_short | Structure of surface electronic states in strained mercury telluride |
| title_sort | structure of surface electronic states in strained mercury telluride |
| topic | topological insulator surface states strained HgTe |
| url | https://doi.org/10.1088/1367-2630/ab1406 |
| work_keys_str_mv | AT ovkibis structureofsurfaceelectronicstatesinstrainedmercurytelluride AT okyriienko structureofsurfaceelectronicstatesinstrainedmercurytelluride AT iashelykh structureofsurfaceelectronicstatesinstrainedmercurytelluride |