Theory of the electric activity of He II induced by waves of first and second sound

Abstract

An approximate microscopic model is proposed to explain the electric signal $▵U\ensuremath{\approx}{k}_{B}▵T/2e$ observed by A. S. Rybalko [Fiz. Nizk. Temp. 30, 1321 (2004)] in He II in experiments with standing half-waves of second sound. The model is based on the idea, due to Gutlyanskii, of one-directional polarization of $^{4}\mathrm{He}$ atoms located at the electrode surface. The calculated parameters of the electric signal are in approximate agreement with the experimental ones. It is also predicted that a standing half-wave of first sound should induce a variable signal with amplitude $▵U~▵p/|e|n~3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}▵p\text{V}/\text{atm}$ at the electrode.