| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Exchange effect and magneto-plasmon mode dispersion in an anisotropic two-dimensional electronic system |
| Xiaoguang Wu(吴晓光)1,2 |
1 State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract The exchange effect and the magneto-plasmon mode dispersion are studied theoretically for an anisotropic two-dimensional electronic system in the presence of a uniform perpendicular magnetic field. Employing an effective low-energy model with anisotropic effective masses, which is relevant for a monolayer of phosphorus, the exchange effect due to the electron-electron interaction is treated within the self-consistent Hartree-Fock approximation. The magneto-plasmon mode dispersion is obtained by solving a Bethe-Salpeter equation for the electron density-density correlation function within the ladder diagram approximation. It is found that the exchange effect is reduced in the anisotropic system in comparison with the isotropic one. The magneto-plasmon mode dispersion shows a clear dependence on the direction of the wave vector.
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Received: 23 July 2016
Revised: 18 August 2016
Accepted manuscript online:
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PACS:
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78.20.Ls
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(Magneto-optical effects)
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73.21.-b
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(Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems)
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73.22.Lp
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(Collective excitations)
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81.05.Zx
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(New materials: theory, design, and fabrication)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61076092 and 61290303). |
Corresponding Authors:
Xiaoguang Wu
E-mail: xgwu@red.semi.ac.cn
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Cite this article:
Xiaoguang Wu(吴晓光) Exchange effect and magneto-plasmon mode dispersion in an anisotropic two-dimensional electronic system 2016 Chin. Phys. B 25 117801
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