Radiation-induced oscillatory magnetoresistance in a tilted magnetic field inGaAs∕AlxGa1−xAs

Abstract

We examine the microwave-photoexcited magnetoresistance oscillations in a tilted magnetic field in the high mobility two-dimensional electron system. In analogy to the 2D Shubnikov-de Haas effect, the characteristic field, B f , and the period of the radiation-induced magnetoresistance oscillations appears dependent upon the component of the applied magnetic field that is perpendicular to the plane of the 2DES. In addition, we find that a parallel component, B // , in the range of 0.6 < B // < 1.2 Tesla, at a tilt angle of θ = 80 0 , leaves the oscillatory pattern essentially unchanged.

Resistance oscillations induced by the Hall field in tilted magnetic fields

“…1 obtained at B = 0 shows that the oscillation amplitude grows monotonically with increasing B ⊥ due to the increase of the Dingle factor λ appearing in Eq. (2). Examination of other data in Fig.…”

“…(1)] and HIROs [Eq. (2)] and that both MIROs and HIROs are destroyed by similar B ∼ 1 T. Second, if B is used as a parameter (instead of θ), the correction to the argument of the Dingle factor can be written as −π∆/ω c ∝ −∆ · ǫ ac . This correction scales with ǫ ac (and not with 1/ǫ ac if θ = const) and therefore higher order oscillations should be more sensitive to B .…”

“…Qt,73.63.Hs, High mobility two-dimensional electron systems (2DESs) exhibit an array of fascinating transport phenomena occurring in very high Landau levels where the Shubnikov-de Haas oscillations (SdHOs) are not yet resolved. Among these are several classes of magnetoresistance oscillations, such as microwave (MIROs), [1][2][3][4][5] phonon, 6 and Hall field (HIROs), 7,8 -induced resistance oscillations, as well as their combinations. 9,10 In a very clean 2DES, MIROs and HIROs can lead to exotic zeroresistance 11 and zero-differential resistance states, 12 respectively, which can be explained in terms of instabilities and formation of current domains.…”

Magnetoresistivity modulated response in bichromatic microwave irradiated two dimensional electron systems

“…From the experimental standpoint, remarkable contributions are being published in a continuous basis. Among them we can highlight activated temperature dependence in the magnetoresisitivity (ρ xx ) response 3,4,5 , quenching of ρ xx response at high microwave (MW) intensities 2,6 , absolute negative conductivity (ANC) and breakdown of ZRS 2,5,6,7 , suppression of MIRO and ZRS by in-plane magnetic field 8,9 and the evidence that MIRO and ZRS are notably immune to the sense of circular polarization of MW radiation 10 . Very recently, an experimental achievement has joined the group of new contributions.…”

Evolution of the linear-polarization-angle-dependence of the radiation-induced magnetoresistance-oscillations with microwave power

“…The huge photo-induced modulation of the dark magnetoresistance in this special photo-response of the 2DES yields potential applications in microwave and terahertz wave sensing. 3 The amplitude of the radiation-induced magnetoresistance oscillations (RiMOs) depends on factors such as radiation frequency [4][5][6] ; temperature 7 , radiation power 8 , linear polarization direction 9,10 , angle between magnetic field and sample normal 11 and current through sample 12 . All these factors have been examined both experimentally [13][14][15][16][17][18][19][20][21][22][23] and theoretically .…”