Low-temperature peculiarities of quantum galvanomagnetic effects in a two-dimensional electron gas at the surface of liquid helium
V. N. Grigor’evPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovO. I. KirichekPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovYu. Z. KovdryaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovYu. P. MonarkhaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
ABI
Аннотация
Low-temperature peculiarities (maximum and minimum) of the longitudinal resistivity ρxx of surface electrons (SE) at liquid helium surface in a quantizing magnetic field are observed experimentally and interpreted theoretically. It is shown that the minimum on the ρxx(T) curve at T ∼ 1.1 K is associated with a competition between the gas and ripplon scattering of SE, while the peak at T ∼ 0.55 K is due to a coincidence of the quite narrow Landau ground level Γ with the characteristic frequency ω1 of ripplons with a wave vector ∼ l−1 (l is the magnetic length) participating in the scattering.
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