Multistability,absolute negative conductivity and spontaneous current generation in semiconductor superlattices in large magnetic fields |
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| Institution: | 1. Department of Physics, University of Illinois at Urbana-Champaign, 1110 W. Green St. Urbana, IL 61801, U.S.A.;2. Department of Physics, Loughborough University, Loughborough, LE11 3TU, U.K.;3. Theory of Nonlinear Processes Laboratory, Kirensky Institute of Physics, Krasnoyarsk, 660036, Russia;1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;2. Department of Mathematics, Jagannath University, Dhaka 1100, Bangladesh;3. Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing 100044, China;4. School of Mechanical and Mechatronic Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, Ultimo, NSW 2007, Australia;1. Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan;2. Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, P.O. Box 80257, Jeddah 21589, Saudi Arabia |
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| Abstract: | We discuss electron transport through a semiconductor superlattice subject to an electric field parallel to, and a magnetic field perpendicular to, the growth axis using a semiclassical balance equation model. We find that the current–voltage characteristic becomes multistable in a large magnetic field; furthermore, hot electrons display novel features in their current–voltage characteristic, including absolute negative conductivity and a spontaneously generated dc current at zero bias. |
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