Microwave-resonance-induced resistivity: evidence of ultrahot surface-state electrons on liquid 3He.
Measurements of the dc resistivity of surface-state electrons on liquid helium exposed to microwave radiation are reported. It is shown that the resonant microwave excitation of surface-state electrons is accompanied by a strong increase in their resistivity, which is opposite to the result expected from the previously used two-level model. We show that even a very small fraction of electrons excited to the first excited state and decaying back due to vapor-atom scattering strongly heat the electron system, causing a population of higher subbands. The calculated resistivity change is in good agreement with the observed data.
Low Temperature Physics Laboratory, RIKEN, Hirosawa 2-1, Wako 351-0198, Japan. konstantinov@riken.jp
Denis
D
Konstantinov
Hanako
H
Isshiki
Yuriy
Y
Monarkha
Hikota
H
Akimoto
Keiya
K
Shirahama
Kimitoshi
K
Kono