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Superconducting Electronic Specific Heat Dependence on Temperature: Intrinsic Origin of the Upturn at Low T
Author(s) -
Buzea C.,
Yamashita T.,
Nakajima K.,
Rezlescu N.,
Buzea C. Gh.,
Agop M.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199706)201:2<465::aid-pssb465>3.0.co;2-j
Subject(s) - superconductivity , specific heat , condensed matter physics , formalism (music) , physics , schottky diode , thermodynamics , materials science , quantum mechanics , art , musical , diode , visual arts
The functional dependence of superconducting electronic specific heat on temperature has been derived using the critical field expression obtained by solving the Ginzburg‐Landau equation in the elliptic function formalism. At low temperatures the superconducting specific heat shows an intrinsic upturn. A possible explanation is given. We emphasize the fact that the upturn observed in the specific heat measurements has three main contributions: due to Schottky anomalies under 2 K, due to nuclear coupling under 1 K and an intrinsic contribution to the superconducting state at various temperatures, depending on the magnitude of the linear term of the normal electronic specific heat.