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Resonant tunneling in periodic multiple-barrier structures with compound-barrier unit
Authors:XD Zhao  H Yamamoto  K Taniguchi  ZM Chen
Institution:1. Department of Information Science, Fukui University, 3-9-1 Bunkyo, Fukui, 910, Japan;2. Xı́an University of Technology, PRC;1. Centro de Investigaciones en Óptica, Lomas del Bosque 115, Lomas del Campestre, 37150 León, Guanajuato, Mexico;2. Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, P.O. Box 55-534, 09340 México D.F., Mexico;3. Departamento de Física, Centro de Investigaciones del Instituto Politécnico Nacional, Av. I.P.N. 2508, 07360 México D.F., Mexico;4. Departamento de Física, Facultad de Ciencias, Universidad Autónoma del Estado de México, 50000 Toluca, Estado de México, Mexico;1. Unidad Académica de Física, Universidad Autónoma de Zacatecas, Calzada Solidaridad esquina con Paseo La Bufa S/N, C.P. 98060, Zacatecas, Zac., Mexico;2. Unidad Académica de Ingeniería, Universidad Autónoma de Zacatecas, Ramón López Velarde 801, C.P. 98000, Zacatecas, Zac., Mexico;3. Centro de Investigación en Ciencias, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209, Cuernavaca, Morelos, Mexico;1. Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;1. Optoelectronic Materials and Technologies Engineering Laboratory of Shandong, Department of Physics, Qingdao University of Science and Technology, Qingdao, 266061, China;2. State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, 510275, China
Abstract:Resonant tunneling in multiple-barrier structures with arbitrary potential profile is studied theoretically. Analytical expressions of the transmission coefficient and the resonance condition are derived by taking into account the mass difference between well and barrier layers. The basic barrier unit in the periodic multiple-barrier structure may be a compound-barrier structure, and the simplest compound-barrier unit is the double-barrier unit. Two independent resonance conditions exist in the multiple-barrier structures with compound-barrier unit and both the subband gap energy and the energy value at the center of the subband gap may be determined analytically and independently for the multiple-barrier structure with double-barrier unit.
Keywords:
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