Superconductivity based on a~model with three overlapping energy bands and a~nonphonon mechanism
Teoretičeskaâ i matematičeskaâ fizika, Tome 91 (1992) no. 3, pp. 483-499
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A study is made of the thermodynamic properties of a three-band superconductor with an electron (or hole) mechanism of superconductivity. Interband carrier interaction is considered as the main reason for the occurrence of superconducting pairs. Expressions are obtained for the order parameters $\Delta_n(T)$ ($n=1,2,3$), the specific heat $C_S$, and the thermodynamic critical field $H_c$
in the region of low temperatures and also the temperature $T_c$ of the superconducting transition, the jump in the specific heat ($C_S-C_N$) at the point $T=T_c$, and $2\Delta_n(0)/T_c$. It is shown that a characteristic feature in the behavior of $T_c$, ($C_S-C_N$), and $\Delta_n(0)$ as functions of the carrier concentration $n$ is the presence of a smeared step. It is also shown that $(C_S-C_N)/C_N\leqslant1{,}43$ and that this ratio depends strongly on the relationship between the densities of the electron states of the considered bands.
@article{TMF_1992_91_3_a12,
author = {M. G. Calalb and F. G. Kochorb\'e and M. E. Palistrant},
title = {Superconductivity based on a~model with three overlapping energy bands and a~nonphonon mechanism},
journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
pages = {483--499},
publisher = {mathdoc},
volume = {91},
number = {3},
year = {1992},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/TMF_1992_91_3_a12/}
}
TY - JOUR AU - M. G. Calalb AU - F. G. Kochorbé AU - M. E. Palistrant TI - Superconductivity based on a~model with three overlapping energy bands and a~nonphonon mechanism JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1992 SP - 483 EP - 499 VL - 91 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1992_91_3_a12/ LA - ru ID - TMF_1992_91_3_a12 ER -
%0 Journal Article %A M. G. Calalb %A F. G. Kochorbé %A M. E. Palistrant %T Superconductivity based on a~model with three overlapping energy bands and a~nonphonon mechanism %J Teoretičeskaâ i matematičeskaâ fizika %D 1992 %P 483-499 %V 91 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1992_91_3_a12/ %G ru %F TMF_1992_91_3_a12
M. G. Calalb; F. G. Kochorbé; M. E. Palistrant. Superconductivity based on a~model with three overlapping energy bands and a~nonphonon mechanism. Teoretičeskaâ i matematičeskaâ fizika, Tome 91 (1992) no. 3, pp. 483-499. http://geodesic.mathdoc.fr/item/TMF_1992_91_3_a12/