Abstract
The dependence of the superconducting gap of a thin superconducting film under irradiation by a UHF field is investigated for different values of the amplitude and frequency of the electromagnetic field and arbitrary temperatures. It is shown that the maximal stimulation of superconductivity does not exceed several percent. The distribution functions of nonequilibrium quasiparticles are found for different values of the parameters of the problem. A theoretical investigation of phonon emission from the film under UHF pumping is given. It is shown that in a small spectral interval of frequencies near the double gap value the film does not emit, but absorbs phonons from the substrate. This result is closely related to the stimulation of superconductivity by the UHF field and is due to the effective “supercooling” of the electron subsystem. The role of “heating” processes due to inelastic electron-electron collisions, which increase the total number of quasiparticles, is considered and their influence on the kinetics of nonequilibrium electrons and phonon emission is investigated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. M. Gulian and G. F. Zharkov,Zh. Eksp. Teor. Fiz. 80, 303 (1981).
G. M. Eliashberg,Zh. Eksp. Teor. Fiz. 61, 1254 (1971).
G. M. Eliashberg, Dissertation, Moscow (1971).
B. N. Ivlev and G. M. Eliashberg,Pisma Zh. Eksp. Teor. Fiz. 11, 186 (1970).
B. I. Ivlev, S. G. Lisitsyn, and G. M. Eliashberg,J. Low Temp. Phys. 10, 449 (1973).
G. Eilenberger,Z. Physik 214, 195 (1968).
A. M. Gulian and G. F. Zharkov,Phys. Lett. 80A, 79 (1980).
L. P. Gorkov,Zh. Eksp. Teor. Fiz. 37, 1407 (1959).
N. R. Werthamer,Rev. Mod. Phys. 36, 299 (1964).
L. Tewordt,Phys. Rev. A137, 1745 (1965).
J. Bardeen,Rev. Mod. Phys. 34, 667 (1967).
T. M. Klapwijk, J. M. Van der Berg, and I. E. Mooij,J. Low Temp. Phys. 25, 385 (1977).
V. M. Dmitriev and E. V. Christenko,Fiz. Nizkikh Temp. 4, 821 (1978).
U. Eckern, A. Schmid, M. Schmutz, and G. Schön,J. Low Temp. Phys. 36, 643 (1979).
G. M. Eliashberg,Pisma Zh. Eksp. Teor. Fiz. 11, 186 (1970).
L. G. Aslamazov and V. P. Gavrilov,Fiz. Nizkikh Temp. 6, 877 (1980).
J. A. Pals and J. Dobben,Phys. Rev. B 20, 935 (1979).
V. F. Elesin and Yu. V. Kopaev,Uspekhi Fiz. Nauk 133, 259 (1981).
B. N. Ivlev and G. M. Eliashberg,Pisma Zh. Eksp. Teor. Fiz. 13, 462 (1971).
V. F. Elesin,Zh. Eksp. Teor. Fiz. 80, 293 (1981).
A. T. Aronov and B. Z. Spivak,Zh. Eksp. Teor. Fiz. 77, 652 (1979).
I. J. Chang and D. J. Scalapino,J. Low Temp. Phys. 31, 1 (1978).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gulian, A.M., Zharkov, G.F. Nonequilibrium kinetics of electrons and phonons in superconductors in intense UHF fields. J Low Temp Phys 48, 125–150 (1982). https://doi.org/10.1007/BF00681722
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00681722