Ultrasonic Absorption at Low Temperatures Subject to the Fermi Liquid Correlation of Electrons

• Published in: Inorganic materials : applied research Vol. 10; no. 3; pp. 532 - 534
• Main Authors: Kashlev, Yu. A., Vinogradova, N. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.05.2019; Springer Nature B.V
• Subjects: Absorption; Chemistry; Chemistry and Materials Science; Conduction electrons; Correlation analysis; Effects of Energy Fluxes on Materials; Electrons; Fermi liquids; Industrial Chemistry/Chemical Engineering; Inhomogeneity; Inorganic Chemistry; Low temperature; Materials Science; metal; electron; absorption; ultrasound; acoustic wave
• ISSN: 2075-1133; 2075-115X
• DOI: 10.1134/S2075113319030158

At low temperatures, ultrasonic absorption in metals is determined by the interaction of waves with conduction electrons. In the framework of the phenomenological theory, ultrasonic absorption in normal metals taking into account the Fermi liquid correlation of electrons is studied. It is assumed that the degenerate electron liquid is close to the equilibrium state and the spatial inhomogeneity scale 1/ q ( q is the ultrasonic wave vector) is larger than the mean free path of the conduction electrons. It is found that, taking into account the Fermi liquid correlations, the absorbed ultrasonic energy additionally contains terms (1 + η L ), where η L are the second- and third-order moments of an effective interaction between electrons. Estimates of η L show that the contribution of the liquid effects can be significant.