Results 181 to 190 of about 4,873 (226)
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Excitations of a drifting 2DEG
Solid-State Electronics, 1996Abstract Results are presented on spatially resolved Raman scattering and photoluminescence measurements of a drifting two-dimensional electron gas. Under drifting conditions, a low energy feature is observed in polarized Raman scattering in addition to the intrasubband plasmon mode, and was found to disperse linearly with in-plane wavevector.
A.S Bhatti +6 more
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Diffusion thermopower of a 2DEG
Journal of Physics: Condensed Matter, 1991The authors investigate the effect of the background impurity concentration NBI on the thermopower of a GaAs/AlGaAs heterojunction. A comparison between a GaAs/AlGaAs heterojunction and a Si MOSFET is also given. For the heterojunction the authors always find a negative sign for the thermopower, in contrast to the Si MOSFET for which the sign sometimes
V C Karavolas, P N Butcher
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Observation of inverse Edelstein effect in Rashba-split 2DEG between SrTiO 3 and LaAlO 3 at room temperature [PDF]
Science Advances, 2017 The Rashba physics has been intensively studied in the field of spin orbitronics for the purpose of searching novel physical properties and the ferromagnetic (FM) magnetization switching for technological applications.
Qi Song, Hongrui Zhang, Tang Su
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Physica B: Condensed Matter, 1998
We review recent heat capacity experiments performed on GaAs/AlGaAs heterostructures containing two-dimensional electron layers. Near v=1, the strong coupling to the nuclear spin system attributed to Skyrmion-induced low-energy spin excitations has a dramatic effect on the heat capacity which rises by orders of magnitude.
E. Grivei +4 more
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We review recent heat capacity experiments performed on GaAs/AlGaAs heterostructures containing two-dimensional electron layers. Near v=1, the strong coupling to the nuclear spin system attributed to Skyrmion-induced low-energy spin excitations has a dramatic effect on the heat capacity which rises by orders of magnitude.
E. Grivei +4 more
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A novel InGaAs Schottky-2DEG diode
1993 (5th) International Conference on Indium Phosphide and Related Materials, 2002The preparation and properties of planar pseudomorphic InGaAs Schottky two-dimensional electron gas (2DEG) diodes are described. Single- and double-barrier diodes were prepared on metal-organic vapor phase epitaxial (MOVPE) grown modulation doped FET (MODFET)-like structures.
MARSO, Michel +5 more
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physica status solidi c, 2009
AbstractPhotoluminescence spectra taken from modulationdoped CdTe/(Cd0.7Mg0.3)Te quantum well structures with a two‐dimensional electron gas of moderate to high density (from ne ∼ 1010 up to ne ∼ 1012 cm–2) in magnetic fields from 0 T to 45 T were studied. The observed spectra were analyzed in terms of combined excitonelectron processes.
V. P. Kochereshko +4 more
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AbstractPhotoluminescence spectra taken from modulationdoped CdTe/(Cd0.7Mg0.3)Te quantum well structures with a two‐dimensional electron gas of moderate to high density (from ne ∼ 1010 up to ne ∼ 1012 cm–2) in magnetic fields from 0 T to 45 T were studied. The observed spectra were analyzed in terms of combined excitonelectron processes.
V. P. Kochereshko +4 more
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Magnetotransport in 2DEG with magnetic barriers
Physica E: Low-dimensional Systems and Nanostructures, 2002We have studied the transport in 2DEG subjected to two different types of magnetic barrier. Excess resistivities due to those magnetic barriers increase as T2. The resistance as a function of the uniform component of the magnetic field exhibits a positive magnetoresistance and a beating pattern of the Shubnikov–de Haas oscillations.
Masahiro Hara +3 more
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On optical gain mechanisms in a 2DEG photodetector
Proceedings of the 2001 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference. (Cat. No.01TH8568), 2002Discusses the gain mechanisms in an optical detector based on a modulation doped heterojunction. It is shown that, in this gate-less HEMT device, varying the density of the mobile electron gas produces large differences in optical responsivity. The observed behavior is explained on the basis of a internal variation of the Fermi level, similar to a ...
Nabet B +4 more
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Persistent currents in meoscopic 2DEG rings
Czechoslovak Journal of Physics, 1996We performed measurements of the magnetic response of a single mesoscopic ring made of a GaAlAs/GaAs heterojunction (2 DEG). We detected a magnetic signal, with a period h/e, which is an evidence, of persistent currents. The amplitude and the sign of this signal seem to vary in time despite a stable amplitude and phase of the Aharonov-Bohm conductance ...
Geraldo Cernicchiaro +3 more
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Quantum capacitance measurement of 2DEG
2020Two-dimensional electron gas has various novel properties. This kind of electronic system like two-dimensional semiconducting transition metal dichalcogenides (TMDCs) and graphene are discovered with novel physical phenomena like valley Hall effect, Ising superconductivity and circular dichroism etc. In this thesis, the negative capacitance and inverse
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