Author/Authors :
Avramenko، نويسنده , , Yu.A. and Bezuglyi، نويسنده , , E.V. and Burma، نويسنده , , N.G. and Gokhfeld، نويسنده , , V.M. and Kolobov، نويسنده , , I.G. and Fil، نويسنده , , V.D. and Shevchenko، نويسنده , , O.A.، نويسنده ,
Abstract :
The temperature dependence of the amplitude and phase of the electric potential arising at a plane boundary of a metal when a longitudinal acoustic wave is incident normally on it is investigated theoretically and experimentally. The surface potential is formed by two contributions, one of which is spatially periodic; the second one is aperiodic and arises as a result of an additional nonuniformity of the electron distribution in a surface layer of the metal. The phases of these contributions are shifted by approximately π/2. In the normal state, the experiment is in qualitative agreement with the theory. The superconducting transition is accompanied by catastrophically rapid vanishing of the electric potential, in sharp contrast to the theoretical estimates.
