Results 191 to 200 of about 4,873 (226)

Plasmons on Laterally Drifting 2DEGs

1993
The plasmon modes of a two dimensional electron gas (2DEG) formed at a semiconductor heterojunction or in a quantum well have received much attention over the past few years.
H. P. Hughes, R. E. Tyson, L. C. Ó. Súilleabháin, R. J. Stuart   +3 more
openaire   +1 more source

Localization effects in a non-degenerate 2DEG

Surface Science, 1988
Abstract We report a systematic study of localization effects in a non-degenerate two-dimensional electron gas formed on a solid hydrogen substrate. Magnetoresistance measurements in a Corbino geometry are presented as a function of surface disorder.
P.W. Adams, M.A. Paalanen
openaire   +1 more source

Improved quantization of 2DEG of p-HEMT

International Semiconductor Device Research Symposium, 2003, 2004
The heterostructure potential of a tri-gate depleted mode p-HEMT was modeled for conventional and tailored field operation conditions. The set of energy levels in quantum wells under same bias on all gates were compared with parameters of p-HEMT, when the bias on the gates are varied.
S. Gudimetta, S. Mil'shtein
openaire   +1 more source

Electron transport in a non-planar 2DEG

Surface Science, 1996
We investigate electron transport in a spatially varying magnetic field generated by applying a uniform field to a non-planar 2DEG grown by MBE on a substrate patterned with etched facets. When a magnetic field is applied in the plane of the substrate, the resistance measured across a facet is quantised.
M.L. Leadbeater, C.L. Foden, J.H. Burroughes, T.M. Burke, L.L. Wang, M.P. Grimshaw, D.A. Ritchie, M. Pepper   +7 more
openaire   +1 more source

Energy lowering of 2DEG by strong magnetic field

Physical Review Letters, 1993
We study the two-dimensional interacting electrons in a magnetic field. It is found that for systems with completely filled Landau levels, when the electron density and magnetic field are large enough, the total energy is lowered by the magnetic field.
openaire   +2 more sources

Spectroscopy of electron–electron scattering in a 2DEG

Physics-Uspekhi, 2001
Experimentally electron-beam injection and detection via quantum point-contacts is used to investigate the scattering of a non-equilibrium electron distribution in a two-dimensional electron gas (2DEG) of a GaAs/(Ga,Al)As heterostructure. The energy dependence of electron–electron scattering processes has been studied in a weak magnetic field by ...
H Buhmann, H Predel, L W Molenkamp, R N Gurzhi, A N Kalinenko, A I Kopeliovich, A V Yanovsky   +6 more
openaire   +1 more source

Bernstein modes in grating-coupled 2DEGs

Semiconductor Science and Technology, 1996
Calculations and experimental data are reported on the optical coupling to the Bernstein modes of a two-dimensional electron gas (2DEG) in a perpendicular magnetic field using an overlaid grating coupler. The Bernstein modes are harmonics of the cyclotron resonance and are observed indirectly through their interaction with the 2DEG magnetoplasmon.
D E Bangert, R J Stuart, H P Hughes, D A Ritchie, J E F Frost   +4 more
openaire   +1 more source

An explicit model for a quantum channel in 2DEG

Superlattices and Microstructures, 2002
A two-parametric model for a channel in a two-dimensional electron gas (2DEG) is proposed which allows for the explicit analytical solution for the problem of quantum electron transport through the constriction. Conductance step smearing appears naturally and a simple criterion for the step occurrence in terms of channel parameters is given.
Valeri A. Fedirko, Mei-Hsin Chen, Chiung-Chuan Chiu, Shi-Fong Chen, Kaung-Hsiung Wu, Jenh-Yih Juang, Tzeng-Ming Uen, Yi-Shun Gou   +7 more
openaire   +1 more source

Metal/2DEG contact — a microscopic model

Surface Science, 1994
Abstract A model for a metal contact to a high mobility 2DEG is considered. The model takes into account strong elastic and inelastic electron scattering in the metal and the difference in Fermi surfaces of the metal and of the 2DEG. The thermalization probability for an electron which is incident on the contact is calculated.
openaire   +1 more source

Detection of the oscillation of the Fermi energy of a 2DEG

Surface Science, 1996
Abstract We have used a quantum antidot (QAD) to detect the oscillation of the Fermi energy in a two-dimensional electron gas (2DEG) as a function of magnetic field. At a magnetic field B 0 = n s h 2 ( e 2 π R 2 ) (where n s is the carrier density and R is the radius of the QAD at the Fermi energy) the Shubnikov-de Haas (SdH ...
C.H.W. Barnes, D.R. Mace, G. Faini, D. Mailly, M.Y. Simmons, C.J.B. Ford, M. Pepper   +6 more
openaire   +1 more source