TY - JOUR
T1 - Long mean free path of hot electrons selectively injected to higher subbands
AU - Laikhtman, B.
AU - Sivan, U.
AU - Yacoby, A.
AU - Umbach, C. P.
AU - Heiblum, M.
AU - Kash, J. A.
AU - Shtrikman, H.
PY - 1990
Y1 - 1990
N2 - The long hot-electron mean free path observed by Sivan, Heiblum, and Umbach in high-mobility 2D electron-gas heterostructures is explained by electron transport in the second subband. Our estimates show that the mean free path in the second subband is longer by 2 orders of magnitude than that in the first subband. New magnetic-focusing measurements reveal hot-electron velocities lower than the Fermi velocity, as expected for a higher-subband transport. The electrostatic potential near a biased constriction used as the hot-electron injector is shown to induce nonadiabatic intersubband transfer.
AB - The long hot-electron mean free path observed by Sivan, Heiblum, and Umbach in high-mobility 2D electron-gas heterostructures is explained by electron transport in the second subband. Our estimates show that the mean free path in the second subband is longer by 2 orders of magnitude than that in the first subband. New magnetic-focusing measurements reveal hot-electron velocities lower than the Fermi velocity, as expected for a higher-subband transport. The electrostatic potential near a biased constriction used as the hot-electron injector is shown to induce nonadiabatic intersubband transfer.
UR - http://www.scopus.com/inward/record.url?scp=0009048702&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.65.2181
DO - 10.1103/PhysRevLett.65.2181
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AN - SCOPUS:0009048702
SN - 0031-9007
VL - 65
SP - 2181
EP - 2184
JO - Physical Review Letters
JF - Physical Review Letters
IS - 17
ER -