Anomalous magnetotransport and cyclotron resonance of high mobility magnetic 2DHGs in the quantum Hall regime
نویسنده
چکیده
Low temperature magnetotransport measurements and far infrared transmission spectroscopy are reported in molecular beam epitaxial grown twodimensional hole systems confined in strained InAs quantum wells with magnetic impurities in the channel. The interactions of the free holes spin with the magnetic moment of 5/2 provided by manganese features intriguing localization phenomena and anomalies in the Hall and the quantum Hall resistance. In magnetic field dependent far infrared spectroscopy measurements well pronounced cyclotron resonance and an additional resonance are found that indicates an anticrossing with the cyclotron resonance.
منابع مشابه
Terahertz photovoltaic detection of cyclotron resonance in the regime of radiation-induced magnetoresistance oscillations
Terahertz photovoltaic detection of cyclotron resonance in the regime of radiation-induced magnetoresistance oscillations Report Title We examine and compare the diagonal magnetoresistance, R-xx, and the photovoltage induced by microwave (42 <= f <= 300 GHz) and terahertz (f >= 300 GHz) photoexcitation in the high mobility quasi-two-dimensional GaAs/AlGaAs system. The data demonstrate strong ra...
متن کاملar X iv : 0 80 5 . 14 13 v 2 [ co nd - m at . st r - e l ] 5 S ep 2 00 8 Quantum - critical relativistic magnetotransport in graphene
We study the thermal and electric transport of a fluid of interacting Dirac fermions using a Boltzmann approach. We include Coulomb interactions, a dilute density of charged impurities and the presence of a magnetic field to describe both the static and the low frequency response as a function of temperature T and chemical potential μ. In the quantum-critical regime μ ! T we find pronounced dev...
متن کاملTemperature, electron density and in-plane magnetic field dependence of cyclotron relaxation time in the two-dimensional metallic phase
We have performed cyclotron resonance measurements on two-dimensional electrons in the metallic phase. The temperature, electron density and in-plane magnetic field dependence of cyclotron and transport scattering time are reported for a high-mobility Si/SiGe quantum well.
متن کاملHighly sensitive and tunable detection of far-infrared radiation by quantum Hall devices
We studied far-infrared ~FIR! response due to cyclotron resonance ~CR! of two-dimensional electron gas systems in GaAs/AlGaAs heterostructures by using cyclotron radiation from n-InSb devices as the illumination source. We examined the dependence of the FIR response on different experimental parameters, including the aspect ratio of Hall bars, electron mobility, bias current, illumination inten...
متن کاملTransport and magnetotransport properties of Mn-doped InxGa1 xAs/GaAs quantum well structures
We report on the transport, magnetotransport and magnetic properties of In0.17Ga0.83As quantum well in GaAs d-doped by Mn. At low temperatures, the anomalous Hall effect was observed which detects the spin-polarized carriers. Negative magnetoresistance was found at low temperatures, which became positive at high temperature. r 2005 Elsevier B.V. All rights reserved. PACS: 72.20. i; 75.50.Gg
متن کامل