Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms
We found that thin antimony films contacted by a single layer of a variety of atoms can form topological surface and interface states in the gap of bulk energy bands that preserve time-reversal symmetry. Using density functional calculation, we have included bismuth, graphene, boron-nitride and boro...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2014-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/16/9/093006 |
| _version_ | 1797751179846877184 |
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| author | Chi-Hsuan Lee Chih-Kai Yang |
| author_facet | Chi-Hsuan Lee Chih-Kai Yang |
| author_sort | Chi-Hsuan Lee |
| collection | DOAJ |
| description | We found that thin antimony films contacted by a single layer of a variety of atoms can form topological surface and interface states in the gap of bulk energy bands that preserve time-reversal symmetry. Using density functional calculation, we have included bismuth, graphene, boron-nitride and boron-doped graphene layers in our investigation. In most cases, Dirac cones are found in the band structures and spin textures indicate no back scattering of conduction electrons. In the case of a BC _3 layer deposited on an Sb film as thin as three bilayers, a Dirac cone consisting mostly of interface states is formed close to the Fermi level. If the composite is gated by an adjustable voltage, electron transport can switch between two modes of opposite spins, and between one or two modes of 100% spin polarization. The results should be very useful in the applications of topological conduction and spintronics. |
| first_indexed | 2024-03-12T16:43:45Z |
| format | Article |
| id | doaj.art-a331f06ccea043c383158129e44a6377 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:43:45Z |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a331f06ccea043c383158129e44a63772023-08-08T14:20:21ZengIOP PublishingNew Journal of Physics1367-26302014-01-0116909300610.1088/1367-2630/16/9/093006Topological states of Sb thin films contacted by a single sheet of heterogeneous atomsChi-Hsuan Lee0Chih-Kai Yang1Graduate Institute of Applied Physics, National Chengchi University , Taipei 11605, Taiwan, Republic of ChinaGraduate Institute of Applied Physics, National Chengchi University , Taipei 11605, Taiwan, Republic of ChinaWe found that thin antimony films contacted by a single layer of a variety of atoms can form topological surface and interface states in the gap of bulk energy bands that preserve time-reversal symmetry. Using density functional calculation, we have included bismuth, graphene, boron-nitride and boron-doped graphene layers in our investigation. In most cases, Dirac cones are found in the band structures and spin textures indicate no back scattering of conduction electrons. In the case of a BC _3 layer deposited on an Sb film as thin as three bilayers, a Dirac cone consisting mostly of interface states is formed close to the Fermi level. If the composite is gated by an adjustable voltage, electron transport can switch between two modes of opposite spins, and between one or two modes of 100% spin polarization. The results should be very useful in the applications of topological conduction and spintronics.https://doi.org/10.1088/1367-2630/16/9/093006topological insulatorSb thin filmDirac conespin texture |
| spellingShingle | Chi-Hsuan Lee Chih-Kai Yang Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms New Journal of Physics topological insulator Sb thin film Dirac cone spin texture |
| title | Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms |
| title_full | Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms |
| title_fullStr | Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms |
| title_full_unstemmed | Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms |
| title_short | Topological states of Sb thin films contacted by a single sheet of heterogeneous atoms |
| title_sort | topological states of sb thin films contacted by a single sheet of heterogeneous atoms |
| topic | topological insulator Sb thin film Dirac cone spin texture |
| url | https://doi.org/10.1088/1367-2630/16/9/093006 |
| work_keys_str_mv | AT chihsuanlee topologicalstatesofsbthinfilmscontactedbyasinglesheetofheterogeneousatoms AT chihkaiyang topologicalstatesofsbthinfilmscontactedbyasinglesheetofheterogeneousatoms |