Low Temperature Physics: 44, 1077 (2018); https://doi.org/10.1063/1.5055852
Fizika Nizkikh Temperatur: Volume 44, Number 10 (October 2018), p. 1371-1379 ( to contents , go back )
Channel electron bubbles in low-temperature helium gas
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
Received March 23, 2018, published online August 28, 2018
Self-localization of electrons caused by their interaction with helium vapor atoms in quasi-one-dimensional con-ducting channels over liquid helium is theoretically studied. We have shown that channel electron bubbles of a large size can exist at temperatures which are substantially lower than the critical temperature reported previously for electron bubbles of three-dimensional and two-dimensional electron systems. The transition from a large-size bubble to a small-size bubble is shown to be discontinuous, and a sort of bistability involving metastable states is described. The analysis given explains a sharp decrease of electron mobility in quasi-one-dimensional channels on liquid helium observed at T ≳ 2,5 К.
Key words: electron bubble states, helium gas, self-localization, surface electrons, conducting channels.