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.
Konstantinov
Denis
D
Low Temperature Physics Laboratory, RIKEN, Hirosawa 2-1, Wako 351-0198, Japan. konstantinov@riken.jp
Isshiki
Hanako
H
Monarkha
Yuriy
Y
Akimoto
Hikota
H
Shirahama
Keiya
K
Kono
Kimitoshi
K