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Manfouo F, Nsangou I, Fobasso MFC, Fotue AJ. Electromagnetic field effect on weak-coupling piezoelectric polaron in an asymmetrical Gaussian confinement potential quantum well. Heliyon 2022; 8:e10505. [PMID: 36110233 PMCID: PMC9468402 DOI: 10.1016/j.heliyon.2022.e10505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/05/2022] [Accepted: 08/26/2022] [Indexed: 11/26/2022] Open
Abstract
The properties of an electron weakly coupled to piezo-acoustic phonon in asymmetrical Gaussian confinement potential quantum well (AGCPQW) subject to external electric field (EF) and magnetic field (MF) has been investigated using the Lee-Low-Pines unitary transformation and linear combination operation methods. We have obtained the ground state energy (GSE) and the ground state binding energy (GSBE) of piezoelectric polaron. The effects of the EF, the MF, the range of the asymmetrical Gaussian confinement potential (RAGCP), Debye cut-off wavenumber (DCOW) and the electron–phonon coupling strength on the GSE and the GSBE are also analyzed. It is found that the GSE is an increasing function of the EF and the cyclotron frequency (CF), whereas it is a decreasing one of the RAGCP, the DCOW and electron–phonon coupling strength. The GSBE is an increasing function of the DCOW and the electron–phonon coupling strength. It is also an aggrandizing function with decreasing of the RAGCP, whereas it is a decayed one of the EF and CF. It is shown that the EF, the RAGCP, the MF, the DCOW and electron–phonon coupling strength are important factors that have great influence on the properties of the piezoelectric polaron in AGCPQW.
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Affiliation(s)
- F Manfouo
- Mesoscopic and Multilayers Structures Laboratory, Department of Physics, Faculty of Science,University of Dschang, P.O. Box 479 Dschang, Cameroon
| | - I Nsangou
- Mesoscopic and Multilayers Structures Laboratory, Department of Physics, Faculty of Science,University of Dschang, P.O. Box 479 Dschang, Cameroon
| | - M F C Fobasso
- Mesoscopic and Multilayers Structures Laboratory, Department of Physics, Faculty of Science,University of Dschang, P.O. Box 479 Dschang, Cameroon
| | - A J Fotue
- Mesoscopic and Multilayers Structures Laboratory, Department of Physics, Faculty of Science,University of Dschang, P.O. Box 479 Dschang, Cameroon
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Sun Y, Ma XF, Liu XY, Cui Y, Deng JP, Xiao Y, Li ZQ, Wang ZW. Effective velocities of polaron spin states in monolayer transition metal dichalcogenides. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:235303. [PMID: 33827068 DOI: 10.1088/1361-648x/abf596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
We propose a theoretical model for studying the effective velocities of polaron spin states in monolayer transition metal dichalcogenides (TMDS) on the substrate. It is found that the effective velocity of polaron shows the splitting with different magnitudes due to the Rashba spin-orbit coupling, which results in the reversed distribution of the effective velocities of polaron spin states. Moreover, the reversed points depend on the truncated wave-vector of optical phonon and can be modulated by the polarity of substrate and the internal distance between monolayer TMDS and substrate. These theoretical results enlighten some simple ways to distinguish and modulate the polaron spin states in two-dimensional heterostructures.
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Affiliation(s)
- Yong Sun
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
- Institute of Condensed Matter Physics, Inner Mongolia University for Nationalities, Tongliao 028043, People's Republic of China
| | - Xu-Fei Ma
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
| | - Xiao-Yi Liu
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
| | - Yu Cui
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
| | - Jia-Pei Deng
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
| | - Yao Xiao
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
| | - Zhi-Qing Li
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
| | - Zi-Wu Wang
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, People's Republic of China
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Shoji H, Tokuda N. Phase-transition-like behaviour in the problems of different types of polaron. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/9/010] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Tokuda N, Shoji H, Yoneya K. The acoustic polaron via the deformation potential under the influence of a Coulombic impurity and its phase diagram. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/22/001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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