Volume 56, Number 5, December 2001
|Page(s)||709 - 715|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
Angle-resolved spectroscopy of electron-electron scattering in a 2D system
B.Verkin Institute for Low Temperature Physics
& Engineering National Academy of Sciences of Ukraine - Lenin Ave. 47,
31064, Kharkov, Ukraine
2 Physikalisches Institut der Universität Würzburg - D-97047 Würzburg, Germany
Accepted: 12 September 2001
Electron-beam propagation experiments have been used to determine the energy and angle dependence of electron-electron (ee) scattering in a two-dimensional electron gas (2DEG) in a very direct manner. The experimental results provide direct evidence for novel ee-scattering effects in 2D degenerate conductors. Most striking is the increased importance of small-angle scattering in a 2D system with decreasing excitation energy. In particular, in a 2DEG ee-scattering can, at sufficiently low energies, be purely dephasing in character, i.e. changing the phase but not the direction of electron motion.
PACS: 72.10.-d – Theory of electronic transport; scattering mechanisms / 72.20.Dp – General theory, scattering mechanisms / 73.40.-c – Electronic transport in interface structures
© EDP Sciences, 2001
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