Self-organization in multiple quantum well infrared photodetectors

Ryzhii, M.; Ryzhii, V.; Suris, R. A.; Hamaguchi, Chihiro

doi:10.1088/0268-1242/16/4/303

Cited by 47 publications

(79 citation statements)

References 31 publications

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“…The finding that the THz-induced oscillations depend only weakly on helicity is in line with the results of Smet et al, who examined MIROs at MW frequencies [7]. Now we discuss the results within the inelastic [6,51,52] and the displacement [53][54][55][56][57] mechanisms, which ascribe the magneto-oscillations of the PC to radiation-assisted scattering between disorder-broadened Landau levels. This theory is a nonequilibrium extension of linear transport theory in high Landau levels [58], and accounts for both real-space displacements of electron orbits in individual photon-assisted scattering events (displacement contribution) and associated nonequilibrium occupation of electronic states within the disorder-broadened Landau levels (inelastic contribution).…”

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confidence: 87%

Analog of microwave-induced resistance oscillations induced in GaAs heterostructures by terahertz radiation

et al. 2016

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We report on the study of terahertz radiation-induced MIRO-like oscillations of magnetoresistivity in GaAs heterostructures. Our experiments provide an answer on two most intriguing questions-effect of radiation helicity and the role of the edges-yielding crucial information for an understanding of the MIRO (microwave-induced resistance oscillations) origin. Moreover, we demonstrate that the range of materials exhibiting radiation-induced magneto-oscillations can be largely extended by using high-frequency radiation. DOI: 10.1103/PhysRevB.94.081301 One of the most interesting phenomena recently observed in two-dimensional electron systems (2DES) is microwave (MW) -induced resistance oscillations (MIRO) and associated zero resistance states (ZRS) [1][2][3][4][5][6][7], reviewed, e.g., in [8]. Like Shubnikov-de Haas oscillations (SdH), MIRO are periodic on a 1/B scale, but occur at lower magnetic fields and show much weaker temperature dependence. Phenomenologically, they are very similar to Weiss oscillations [9], which reflect the commensurability between the cyclotron orbit radius and the period of a periodic potential. MIRO by contrast, reflect the commensurability between the MW photon energy 2π f and the cyclotron energy ω c . In extremely clean samples the minima of the MIRO develop into ZRS [3][4][5], which are explained [10] in terms of an instability of the system and formation of current domains, occurring when the conductivity becomes negative under MW irradiation (see also [8,11,12]).In spite of numerous experiments and significant advances in their theoretical understanding, there is still no commonly accepted microscopic description of the effect [13,14] and the ongoing MIRO investigations remain challenging [15][16][17][18][19][20][21]. Consequently, new materials have been studied [22][23][24][25] and new theoretical models have been put forward [26][27][28][29][30]. To the most pressing issues which need to be clarified experimentally and which might help to differentiate between the different models belong the MIRO polarization dependence [7,8,31] and the "bulk" or "edge" nature of the effect.So far the majority of experimental work has been done in the MW regime (1-350 GHz) and there are only a few reports on MIRO excited at terahertz (THz) frequencies [32][33][34]. Here we report on the observation of pronounced MIRO-like oscillations induced by THz radiation. We exploit the specific advantages of THz laser radiation not present in the MW regime, i.e., the possibility to focus it onto a spot smaller than the sample's size and easy control of the radiation's polarization. The most important features clearly detected on a large variety of samples are (i) a very weak dependence of the oscillations' amplitude on the photon helicity and (ii) the bulk nature of the effect. Furthermore, our study shows that the MIRO oscillations can be excited at THz frequencies even in the samples with low mobility, whereas in the MW range ultrahigh mobility samples are crucially needed for this type of experimen...

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confidence: 87%

Analog of microwave-induced resistance oscillations induced in GaAs heterostructures by terahertz radiation

et al. 2016

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“…Among the proposed ideas are the so called "displacement" model [34][35][36][39][40][41]44 , originally proposed in Refs. 68,69 for a different physical situation, the microwave induced dynamical symmetry breaking 37 , the "inelastic" model 6,47,51,58,59 , nonparabolicity effects 45 , the photon assisted quantum tunneling 36 , phase transitions caused by electron pairing due to the exciton exchange 1 and a quantum model that involves the prime number theorem 38 . The "displacement" model suggests, for example, that microwaves assist the impurity and phonon scattering which leads to the spatially indirect transitions between the Landau levels N and N ′ = N + k, k = 1, 2, 3, .…”

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confidence: 99%

Theory of microwave-induced zero-resistance states in two-dimensional electron systems

Mikhaǐlov

2011

Phys. Rev. B

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The phenomena of the microwave induced zero resistance states (MIZRS) and the microwave induced resistance oscillations (MIRO) were discovered in the ultraclean two-dimensional electron systems in 2001 -2003 and have attracted great interest of researchers. In spite of numerous theoretical efforts the true origin of these effects remains unknown so far. We show that the MIRO/ZRS phenomena are naturally explained by the influence of the ponderomotive forces which arise in the near-contact regions of the two-dimensional electron gas under the action of microwaves. The proposed analytical theory is in agreement with all experimental facts accumulated so far and provides a simple and self-evident explanation of the microwave frequency, polarization, magnetic field, mobility, power and temperature dependencies of the observed effects.

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“…However, the probability of the scattering with the spatial displacements of the electron Larmor orbit center ξ exceeding the quantum Larmor radius L = (c /eH) 1/2 is exponentially small. Due to this, such scattering processes are effective, and the variation of the dissipative component of the current caused by microwave radiation (i.e., the photocurrent) is be substantial only in the immediate vicinities of the resonances |Ω − ΛΩ c | max{eEL/ , Γ}, where Γ characterizes the LL broadening [14]. Hence, at small eEL/ and Γ, the ranges Ω − ΛΩ c in which ANC associated with the photon-assisted impurity scattering occurs are rather narrow.…”

Section: Introductionmentioning

confidence: 99%

Absolute negative conductivity in two-dimensional electron systems associated with acoustic scattering stimulated by microwave radiation

Ryzhii

Vyurkov

2003

Phys. Rev. B

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We discuss the feasibility of absolute negative conductivity (ANC) in two-dimensional electron systems (2DES) stimulated by microwave radiation in transverse magnetic field. The mechanism of ANC under consideration is associated with the electron scattering on acoustic piezoelectric phonons accompanied by the absorption of microwave photons. It is demonstrated that the dissipative components of the 2DES dc conductivity can be negative (σxx = σyy < 0) when the microwave frequency Ω is somewhat higher than the electron cyclotron frequency Ωc or its harmonics. The concept of ANC associated with such a scattering mechanism can be invoked to explain the nature of the occurrence of zero-resistance "dissipationless" states observed in recent experiments.

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Self-organization in multiple quantum well infrared photodetectors

Cited by 47 publications

References 31 publications

Analog of microwave-induced resistance oscillations induced in GaAs heterostructures by terahertz radiation

Analog of microwave-induced resistance oscillations induced in GaAs heterostructures by terahertz radiation

Theory of microwave-induced zero-resistance states in two-dimensional electron systems

Absolute negative conductivity in two-dimensional electron systems associated with acoustic scattering stimulated by microwave radiation

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