Magnetic field and finite barrier-height effects on the polarizability of a shallow donor in a GaAs quantum wire |
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| Institution: | 1. Young Researchers and Elite Club, Shiraz Branch, Islamic Azad University, Shiraz, Iran;2. Zarghan Branch, Islamic Azad University, Zarghan, Iran;1. Yerevan State University, Faculty of Physics, Department of Solid State Physics, 1 Alex Manoogian, Yerevan 0025, Armenia;2. State Engineering University of Armenia, Department of Microelectronics and Biomedical Devices, 105, V. Teryan, Yerevan 0009, Armenia;3. Farhangiyan University, Bahonar Street, Niyayesh Cross, Farahzadi Avenue, Sanat Square, Tehran 1939614464, Iran;1. Department of Physics, University of Süleyman Demirel, 32260 Isparta, Turkey;2. Institute of Physics, Azerbaijan National Academy of Sciences, 370143 Baku, Azerbaijan;3. Baku State University Baku Az1148, Azerbaijan;1. College of Physics and Electronic Information, Inner Mongolia Normal University, Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials, Hohhot, 010022, PR China;2. Department of Applied Physics, College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, PR China;3. School of Physical Science and Technology, Inner Mongolia University, Hohhot, 010021, PR China |
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| Abstract: | The binding energy and the polarizability are estimated for a shallow donor confined to move in a GaAs quantum well wire (QWW) with a rectangular and square cross-section under the action of an axial magnetic field. In this work, the Hass variational method within the effective mass approximation is used in the case of infinite and finite barrier QWWs. We present our results as a function of the size of the wire and for several values of the magnetic field strength. It is found that the magnetic field strongly reduces the polarizability. The finite barrier-height effect is important for smaller well widths. For higher fields and large wire, the effects of the magnetic field are predominant and the barrier potential is a small perturbation. |
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