Coherent Electron Focussing in a Two-Dimensional Electron Gas
نویسندگان
چکیده
منابع مشابه
Imaging coherent electronwave flow in a two-dimensional electron gas
We measure the energy distribution of electrons passing through a two-dimensional electron gas using a scanning probe microscope. We present direct spatial images of coherent electron wave flow from a quantum point contact formed in a GaAs/AlGaAs two-dimensional electron gas using a liquid He cooled SPM. A negative voltage is placed on the tip, which creates a small region of depleted electrons...
متن کاملSpatially probed electron-electron scattering in a two-dimensional electron gas
M. P. Jura,1,* M. Grobis,2,† M. A. Topinka,2,3,‡ L. N. Pfeiffer,4,§ K. W. West,4,§ and D. Goldhaber-Gordon2, 1Department of Applied Physics, Stanford University, Stanford, California 94305, USA 2Department of Physics, Stanford University, Stanford, California 94305, USA 3Department of Materials Science & Engineering, Stanford University, Stanford, California 94305, USA 4Bell Labs, Alcatel-Lucen...
متن کاملAbsolute negative resistance induced by directional electron-electron scattering in a two-dimensional electron gas.
A three-terminal device formed by two electrostatic barriers crossing an asymmetrically patterned two-dimensional electron gas displays an unusual potential depression at the middle contact, yielding absolute negative resistance. The device displays momentum and current transfer ratios that far exceed unity. The observed reversal of the current or potential in the middle terminal can be interpr...
متن کاملOptical dephasing of coherent intersubband transitions in a quasi-two-dimensional electron gas
We present a microscopic many-particle theory for the dephasing of coherent intersubband excitations in semiconductor quantum wells including carrier-carrier and carrier-phonon scattering and light propagation effects. The contributions of many-particle processes are nonadditive and thus cannot be treated separately. It is shown that due to nondiagonal correlation contributions, scattering rate...
متن کاملLocal Field Correction Effect on Dicluster Stopping Power in a Strongly Coupled Two-Dimensional Electron Gas System
We calculate the stopping power for heavy-ion diclusters moving in a strongly coupled two-dimensional electron gas system by using the local field corrected dielectric function at finite temperature. We obtain a parameterized local field correction factor based on a relation between the thermal compressibility and exchange-correlation energy in two-dimension. The interpolated parameter is deriv...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Europhysics Letters (EPL)
سال: 1988
ISSN: 0295-5075,1286-4854
DOI: 10.1209/0295-5075/5/8/010