Magneto-transport characteristics of a 2D electron system driven to negative magneto-conductivity by microwave photoexcitation

33rd International Conference on the Physics of Semiconductors

Mani, R.G.^1 ; Kriisa, A.^1

Department of Physics and Astronomy, Georgia State University, Atlanta

GA

30303, United States^1

关键词: 2D electron system;    Diagonal conductivity;    Magneto-conductivity;    Magneto-transport characteristics;    Microwave-photoexcitation;    Numerical solution;    Photo-excitations;    Two-dimensional electron system (2DES);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/864/1/012047/pdf
DOI  :  10.1088/1742-6596/864/1/012047

来源: IOP

【 摘 要 】

The magneto-transport characteristics of the negative conductivity/resistivity state in the microwave photo-excited two-dimensional electron system (2DES) is examined through a numerical solution of the associated boundary value problem. The results suggest, surprisingly, that a bare negative diagonal conductivity/resistivity state in the 2DES under photo-excitation should yield a positive diagonal resistance along with a sign reversal in the Hall voltage.