Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene system
We investigate the valley-dependent transport of a graphene system consisting of a uniaxially stretched graphene sheet connected by two unstrained parts, with the interfaces between the strained and unstrained regions along the zigzag direction. A detailed study on the Fabry–Pérot states in the stra...
| 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/10.1088/1367-2630/16/11/113060 |
| _version_ | 1797751597872185344 |
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| author | Mou Yang Jian Wang |
| author_facet | Mou Yang Jian Wang |
| author_sort | Mou Yang |
| collection | DOAJ |
| description | We investigate the valley-dependent transport of a graphene system consisting of a uniaxially stretched graphene sheet connected by two unstrained parts, with the interfaces between the strained and unstrained regions along the zigzag direction. A detailed study on the Fabry–Pérot states in the strained region reveals that they carry opposite lateral currents for different valleys when a bias is applied across the interfaces, namely, a pure valley-Hall current arises in the central region. The transverse valley conductance is determined by the number of resonant states in the strained region at the Fermi energy. Like the quantum Hall effect, when Fermi energy is varied, the valley-Hall conductance exhibits step structures and the longitudinal conductance shows peaks. |
| first_indexed | 2024-03-12T16:50:52Z |
| format | Article |
| id | doaj.art-a8c64c59a6624963abcb61904e33ce34 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:50:52Z |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-a8c64c59a6624963abcb61904e33ce342023-08-08T11:20:54ZengIOP PublishingNew Journal of Physics1367-26302014-01-01161111306010.1088/1367-2630/16/11/113060Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene systemMou Yang0Jian Wang1Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University , Guangzhou 510006, Peopleʼs Republic of China; Department of Physics, The University of Hong Kong , Pokfulam Road, Hong Kong, Peopleʼs Republic of ChinaDepartment of Physics, The University of Hong Kong , Pokfulam Road, Hong Kong, Peopleʼs Republic of ChinaWe investigate the valley-dependent transport of a graphene system consisting of a uniaxially stretched graphene sheet connected by two unstrained parts, with the interfaces between the strained and unstrained regions along the zigzag direction. A detailed study on the Fabry–Pérot states in the strained region reveals that they carry opposite lateral currents for different valleys when a bias is applied across the interfaces, namely, a pure valley-Hall current arises in the central region. The transverse valley conductance is determined by the number of resonant states in the strained region at the Fermi energy. Like the quantum Hall effect, when Fermi energy is varied, the valley-Hall conductance exhibits step structures and the longitudinal conductance shows peaks.https://doi.org/10.1088/1367-2630/16/11/113060graphenequantum transportstrain72.80.Vp73.22.-f73.23.-b |
| spellingShingle | Mou Yang Jian Wang Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene system New Journal of Physics graphene quantum transport strain 72.80.Vp 73.22.-f 73.23.-b |
| title | Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene system |
| title_full | Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene system |
| title_fullStr | Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene system |
| title_full_unstemmed | Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene system |
| title_short | Fabry–Pérot states mediated quantum valley–Hall conductance in a strained graphene system |
| title_sort | fabry perot states mediated quantum valley hall conductance in a strained graphene system |
| topic | graphene quantum transport strain 72.80.Vp 73.22.-f 73.23.-b |
| url | https://doi.org/10.1088/1367-2630/16/11/113060 |
| work_keys_str_mv | AT mouyang fabryperotstatesmediatedquantumvalleyhallconductanceinastrainedgraphenesystem AT jianwang fabryperotstatesmediatedquantumvalleyhallconductanceinastrainedgraphenesystem |