| Issue |
Europhys. Lett.
Volume 56, Number 5, December 2001
|
|
|---|---|---|
| Page(s) | 709 - 715 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00578-y | |
| Published online | 01 December 2003 | |
Angle-resolved spectroscopy of electron-electron scattering in a 2D system
1
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
Received:
9
July
2001
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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