Phase-sensitive magnetoresistance oscillations induced by commensurate bichromatic irradiations in a two-dimensional electron system
- Key Laboratory of Artificial Structures and Quantum Control, Department of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240 (China)
We analyze a phase-sensitive contribution to the oscillating magnetoresistance induced by the combined driving of two microwave fields having commensurate frequencies ω{sub 1} and ω{sub 2} (m{sub 1}ω{sub 1} + m{sub 2}ω{sub 2} = 0 for at least a set of nonzero integers m{sub 1} and m{sub 2}), based on the balance-equation approach to magnetotransport for high-density two-dimensional electron systems. This commensurate oscillating photoresistance not only depends on the frequencies and polarizations of both microwaves, but varies drastically when changing the relative phases of two incident radiation fields. It shows up most significantly in the case of ω{sub 2}/ω{sub 1} = 3 and may lead to a phase-controllable change of more than a factor of two in the total magnetoresistivity in the vicinity of ω{sub 1}/ω{sub c} = 1.5 and 2.5 (ω{sub c} is the cyclotron frequency), when both radiation fields are linearly x-direction polarized.
- OSTI ID:
- 22304005
- Journal Information:
- Journal of Applied Physics, Vol. 115, Issue 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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