Spectroscopy of electron - electron scattering in a 2DEG
H. Buhmanna,
H. Predela,
L.V. Molenkampa,
R.N. Gurzhib,
A.N. Kalinenkob,
A.I. Kopeliovichb,
A.V. Yanovskyb aJulius-Maximilians-Universität Würzburg, Sanderring, 2 Würzburg, 97070, Germany , Würzburg , Germany bB.Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, prosp. Lenina 47, Kharkov, 61103, Ukraine
Experimentally electron-beam injection and detection via quantum point-contacts is used to investigate the scattering of a non-equilibrium electron distribution in a twodimensional 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 investigating the detector signal. Assuming electron beams with a narrow opening angle a magnetic field $B$ perpendicular to the 2DEG plane causes only electrons which are scattered in a point $O$ at an angle $\alpha$ to reach the detector. Thus, it is possible to measure directly the energy dependence of the angular electron distribution after scattering. The experimental data give a clear evidence for the importance of small angle scattering processes in two-dimensional systems, as predicted theoretically.
PACS:73.63.−b, 73.21.−b, 68.65.−k, 71.35.−y (all) DOI:10.1070/1063-7869/44/10S/S11 URL: https://ufn.ru/en/articles/2001/13/k/ Citation: Buhmann H, Predel H, Molenkamp L V, Gurzhi R N, Kalinenko A N, Kopeliovich A I, Yanovsky A V "Spectroscopy of electron - electron scattering in a 2DEG" Phys. Usp.44 57–61 (2001)
@article{Buhmann:2001,author = {H. Buhmann and H. Predel and L. V. Molenkamp and R. N. Gurzhi and A. N. Kalinenko and A. I. Kopeliovich and A. V. Yanovsky},title = {Spectroscopy of electron - electron scattering in a 2DEG},publisher = {Physics-Uspekhi},year = {2001},journal = {Phys. Usp.},volume = {44},number = {13},pages = {57-61},url = {https://ufn.ru/en/articles/2001/13/k/},doi = {10.1070/1063-7869/44/10S/S11}}