Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2
We study valley polarization, spin, and valley Hall conductivity in doped monolayer MoS2 considering dopant introduced magnetic exchange field using low energy effective Hamiltonian. We found that dopant introduced magnetic exchange field breaks the time inversion symmetry and decouples the energeti...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/1303816 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832564477204103168 |
|---|---|
| author | Sintayehu Mekonnen Pooran Singh |
| author_facet | Sintayehu Mekonnen Pooran Singh |
| author_sort | Sintayehu Mekonnen |
| collection | DOAJ |
| description | We study valley polarization, spin, and valley Hall conductivity in doped monolayer MoS2 considering dopant introduced magnetic exchange field using low energy effective Hamiltonian. We found that dopant introduced magnetic exchange field breaks the time inversion symmetry and decouples the energetically degenerated valleys into nondegenerate. Moreover, the calculated result reveals that, at low temperature, in insulating regime, anomalous Hall conductivity in a single valley and the total valley Hall conductivity are quantized, whereas the total spin Hall conductivity vanishes identically. We also found that the strength of the spin-orbit coupling together with the exchange field determines the valley polarization, which in turn controls valley and spin Hall conductivity in doped monolayer MoS2 system. The spin Hall and valley Hall conductivity is dissipationless in the absence of any external magnetic field. Therefore, our results are crucial to generate low power electronics devices. |
| format | Article |
| id | doaj-art-61524a05aa264c769549e9014fcab794 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-61524a05aa264c769549e9014fcab7942025-02-03T01:11:00ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242018-01-01201810.1155/2018/13038161303816Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2Sintayehu Mekonnen0Pooran Singh1Addis Ababa University, Department of Physics, Addis Ababa, EthiopiaAddis Ababa University, Department of Physics, Addis Ababa, EthiopiaWe study valley polarization, spin, and valley Hall conductivity in doped monolayer MoS2 considering dopant introduced magnetic exchange field using low energy effective Hamiltonian. We found that dopant introduced magnetic exchange field breaks the time inversion symmetry and decouples the energetically degenerated valleys into nondegenerate. Moreover, the calculated result reveals that, at low temperature, in insulating regime, anomalous Hall conductivity in a single valley and the total valley Hall conductivity are quantized, whereas the total spin Hall conductivity vanishes identically. We also found that the strength of the spin-orbit coupling together with the exchange field determines the valley polarization, which in turn controls valley and spin Hall conductivity in doped monolayer MoS2 system. The spin Hall and valley Hall conductivity is dissipationless in the absence of any external magnetic field. Therefore, our results are crucial to generate low power electronics devices.http://dx.doi.org/10.1155/2018/1303816 |
| spellingShingle | Sintayehu Mekonnen Pooran Singh Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2 Advances in Condensed Matter Physics |
| title | Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2 |
| title_full | Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2 |
| title_fullStr | Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2 |
| title_full_unstemmed | Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2 |
| title_short | Dopant Introduced Valley Polarization, Spin, and Valley Hall Conductivity in Doped Monolayer MoS2 |
| title_sort | dopant introduced valley polarization spin and valley hall conductivity in doped monolayer mos2 |
| url | http://dx.doi.org/10.1155/2018/1303816 |
| work_keys_str_mv | AT sintayehumekonnen dopantintroducedvalleypolarizationspinandvalleyhallconductivityindopedmonolayermos2 AT pooransingh dopantintroducedvalleypolarizationspinandvalleyhallconductivityindopedmonolayermos2 |