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

Yu.P. Monarkha

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
E-mail: monarkha@ilt.kharkov.ua
pos Анотація:

Received March 23, 2018, published online August 28, 2018

Abstract

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.

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