Abstract
Nonequilibrium phenomena in the two electrodes of high-current-density superconducting tunnel junctions are analyzed. The quasiparticle injection-induced enhancement of the energy gaps as well as of the critical current of one of the electrodes are considered. A graphic approach is employed to solve the coupled gap equations for both films. Multiple-gap states are found at voltages close to the sum and difference of the two gaps. If a large transport current is passed through one of the electrodes, multiple stable solutions of the gap equations occur at most bias voltages. Because each solution has its own critical current level, the nonequilibrium critical current is no longer a simple single-valued quantity.
Similar content being viewed by others
References
J. E. Mooij, inNonequilibrium Superconductivity, Phonons and Kapitza Boundaries, K. E. Gray, ed. (Plenum Press, New York, 1981), p. 191.
G. M. Eliashberg and B. I. Ivlev, inNonequilibrium Superconductivity, D. N. Langenberg and A. I. Larkin, eds. (North-Holland, Amsterdam, 1985) (manuscript submitted in 1981).
V. M. Dmitriev, V. N. Gubankov, and F. Ya. Nad', inNonequilibrium Superconductivity, D. N. Langenberg and A. I. Larkin, eds. (North-Holland, Amsterdam, 1985).
G. M. Eliashberg,Zh. Eksp. Teor. Fiz. Pis'ma 11, 186 (1970);JETP Lett. 11, 114 (1970); B. I. Ivlev and G. M. Eliashberg,Zh. Eksp. Teor. Fiz. Pis'ma 13, 464 (1971);JETP Lett. 13, 333 (1971); B. I. Ivlev, S. G. Lisitszyn, and G. M. Eliashberg,J. Low Temp. Phys. 10, 449 (1973).
R. H. Parmenter,Phys. Rev. Lett. 7, 274 (1961).
A. G. Aronov and V. L. Gurevich,Zh. Eksp. Teor. Fiz. 63, 1809 (1972).
K. E. Gray,Solid State Commun. 26, 633 (1978).
U. Eckern, A. Schmid. M. Schmutz, and G. Schön,J. Low Temp. Phys. 36, 643 (1979).
P. van den Hamer, E. A. Montie, P. B. L. Meijer, J. E. Mooij, and T. M. Klapwijk,J. Low Temp. Phys.,69, 287 (1987).
R. C. Dynes, V. Narayanamurti, and J. P. Garno,Phys. Rev. Lett. 39, 229 (1977).
K. E. Gray and H. W. Willemsen,J. Low Temp. Phys. 31, 911 (1978).
G. Schön and A.-M. Tremblay,Phys. Rev. Lett. 42, 1086 (1979); see also G. Schön,Physica 109, 1677 (1982).
V. F. Elesin,Sov. Phys. JETP 49, 1121 (1979).
R. Gross, D. B. Schmid, and R. P. Huebener,J. Low Temp. Phys. 62, 245 (1986).
W. Dupont, Diplom Thesis, Karlsruhe (1977).
A. Schmid, G. Schön, and M. Tinkham,Phys. Rev. B 21, 5076 (1980).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
van den Hamer, P., Montie, E.A., Mooij, J.E. et al. Enhancement of superconductivity by quasiparticle injection. I. Model analysis. J Low Temp Phys 69, 265–286 (1987). https://doi.org/10.1007/BF00682662
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00682662