Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Inter-Landau-level relaxation in two-dimensional electron gases at high magnetic fields
AU - Falko, Vladimir
AU - Challis, L. J.
PY - 1993/6/7
Y1 - 1993/6/7
N2 - Inter-Landau-level relaxation in two-dimensional electron and hole gases in high magnetic fields is strongly affected by the extent, lambda(z), of the electronic wavefunction perpendicular to the two-dimensional channel. As the field is increased, the suppression of the one-acoustic-phonon (cyclotron phonon) emission process that occurs when the phonon wavenumber at the cyclotron frequency exceeds lambda(z)-1 causes two-acoustic-phonon emission to replace one-phonon emission as the dominant relaxation process. The field at which this occurs has been calculated. The net reduction in relaxation rate is believed to be partly responsible for the sensitivity of the optical detection of cyclotron resonance in two-dimensional electron gas systems. In zero magnetic field, the two-phonon process should also contribute significantly to the energy and momentum relaxation of hot electrons.
AB - Inter-Landau-level relaxation in two-dimensional electron and hole gases in high magnetic fields is strongly affected by the extent, lambda(z), of the electronic wavefunction perpendicular to the two-dimensional channel. As the field is increased, the suppression of the one-acoustic-phonon (cyclotron phonon) emission process that occurs when the phonon wavenumber at the cyclotron frequency exceeds lambda(z)-1 causes two-acoustic-phonon emission to replace one-phonon emission as the dominant relaxation process. The field at which this occurs has been calculated. The net reduction in relaxation rate is believed to be partly responsible for the sensitivity of the optical detection of cyclotron resonance in two-dimensional electron gas systems. In zero magnetic field, the two-phonon process should also contribute significantly to the energy and momentum relaxation of hot electrons.
U2 - 10.1088/0953-8984/5/23/020
DO - 10.1088/0953-8984/5/23/020
M3 - Journal article
VL - 5
SP - 3945
EP - 3950
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 23
ER -