Spin current between the two different topological phases in the equilibrium system
In this paper, we analyze the equilibrium spin current in a two-dimensional electron gas with a Rashba spin–orbit coupling at zero bias. Silicene has been successfully synthesized on a two-dimensional honeycomb lattice, and has some unique features due to its buckled structure. By applying the elect...
| 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 |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab41bf |
| _version_ | 1797750016442368000 |
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| author | Fan Wei Jinxin Hu Sixia Yu |
| author_facet | Fan Wei Jinxin Hu Sixia Yu |
| author_sort | Fan Wei |
| collection | DOAJ |
| description | In this paper, we analyze the equilibrium spin current in a two-dimensional electron gas with a Rashba spin–orbit coupling at zero bias. Silicene has been successfully synthesized on a two-dimensional honeycomb lattice, and has some unique features due to its buckled structure. By applying the electric and exchange fields, various phases can be realized, such as valley polarized metal (VPM) phase, quantum anomalous Hall state and quantum spin Hall (QSH) state. Both VPM and QSH exhibit metalliclike behavior, we put two different phases in an infinite zigzag nanoribbon, even the weak inhomogeneity of the Rashba medium leads to spin current, and introduce how to control the output polarized current by tuning the electric and exchange fields. Furthermore, we define the concept of bond spin current, and plot the spatial distribution of microscopic spin current. In particular, spin vortex appears when the injected energy is close to the Fermi level, where spin current changes most violently. |
| first_indexed | 2024-03-12T16:26:41Z |
| format | Article |
| id | doaj.art-ab4866f54087435a889f0b6f5be34d01 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:26:41Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-ab4866f54087435a889f0b6f5be34d012023-08-08T15:42:16ZengIOP PublishingNew Journal of Physics1367-26302019-01-01211010302710.1088/1367-2630/ab41bfSpin current between the two different topological phases in the equilibrium systemFan Wei0https://orcid.org/0000-0002-7309-7750Jinxin Hu1Sixia Yu2Department of Modern Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of ChinaDepartment of Physics, Hong Kong University of Science and Technology , Clear Water Bay, Hong Kong, People’s Republic of ChinaHefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of ChinaIn this paper, we analyze the equilibrium spin current in a two-dimensional electron gas with a Rashba spin–orbit coupling at zero bias. Silicene has been successfully synthesized on a two-dimensional honeycomb lattice, and has some unique features due to its buckled structure. By applying the electric and exchange fields, various phases can be realized, such as valley polarized metal (VPM) phase, quantum anomalous Hall state and quantum spin Hall (QSH) state. Both VPM and QSH exhibit metalliclike behavior, we put two different phases in an infinite zigzag nanoribbon, even the weak inhomogeneity of the Rashba medium leads to spin current, and introduce how to control the output polarized current by tuning the electric and exchange fields. Furthermore, we define the concept of bond spin current, and plot the spatial distribution of microscopic spin current. In particular, spin vortex appears when the injected energy is close to the Fermi level, where spin current changes most violently.https://doi.org/10.1088/1367-2630/ab41bfRashba spin–orbit (SO) coupling inhomogeneitybond spin currentspin vortexsilicene |
| spellingShingle | Fan Wei Jinxin Hu Sixia Yu Spin current between the two different topological phases in the equilibrium system New Journal of Physics Rashba spin–orbit (SO) coupling inhomogeneity bond spin current spin vortex silicene |
| title | Spin current between the two different topological phases in the equilibrium system |
| title_full | Spin current between the two different topological phases in the equilibrium system |
| title_fullStr | Spin current between the two different topological phases in the equilibrium system |
| title_full_unstemmed | Spin current between the two different topological phases in the equilibrium system |
| title_short | Spin current between the two different topological phases in the equilibrium system |
| title_sort | spin current between the two different topological phases in the equilibrium system |
| topic | Rashba spin–orbit (SO) coupling inhomogeneity bond spin current spin vortex silicene |
| url | https://doi.org/10.1088/1367-2630/ab41bf |
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