Radiation-induced resistance oscillation and instability in GaAS/AlGaAS heterostructure under transverse magnetic fields
Yang Gui(杨癸)a)†, Tu Bi-Hong(涂必红)a), Li Guo-Hui(李国辉)b) Zhao Hong-Wei(赵宏伟)a), and Zhou Shi-Ping(周世平)a)
aDepartment of Physics, Shanghai University, Shanghai 200444, China; bDepartment of Communication Engineering, Shanghai University, Shanghai 200072, China
Abstract This paper studies dynamics of a modulation-doped GaAs/AlGaAs heterostructure under transverse magnetic fields and microwave radiations. It finds that negative differential conductivity, due to the real-space electron transfer and delayed dielectric relaxation of the interface potential barrier, can lead to complex behaviours when a relatively small magnetic field is applied. Quasiperiodicity, frequency-locking and the routes from period-doubling to chaos are found. Under a large magnetic field, however, two time-independent homogeneous steady states exist; and the longitudinal resistance of the system shows an interesting oscillation with period tuned by the ratio of microwave radiation frequency $\omega$ to the cyclotron frequency $\omega_{\rm c}$ and local minima at $\omega/\omega_{\rm c}={\rm integer}+1/4$.
Received: 19 March 2007
Revised: 15 October 2007
Accepted manuscript online:
PACS:
73.40.Kp
(III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)
Fund: Project
supported by the National Natural Science Foundation of
China (Grant No 60371033).
Cite this article:
Yang Gui(杨癸), Tu Bi-Hong(涂必红), Li Guo-Hui(李国辉) Zhao Hong-Wei(赵宏伟), and Zhou Shi-Ping(周世平) Radiation-induced resistance oscillation and instability in GaAS/AlGaAS heterostructure under transverse magnetic fields 2008 Chin. Phys. B 17 2010
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