%0 Journal Article
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%3 isotope coefficient,R. Kishore.pdf
%X An exact expression for the isotope coefficient (alpha), within the conventional BCS theory, has been derived for any arbitrary electronic density of states and the mass dependence of carrier concentration. it is shown that the effect of the mass dependence of the carrier concentration within the van-Hove scenario (VHS) can explain some anomalous features of alpha for La2CuO4 based superconductors, not explained by earlier theories based on VHS. These anomalous features are the asymmetry of alpha about the optimum concentration (n(m)) corresponding to the maximum critical temperature, minimum in alpha above n(m), and the value of alpha less than 0.5 below n(m).
%8 Oct.
%N 5
%T Isotope Coefficient in High-Tc Superconductors
%@secondarytype PRE PI
%K BCS THEORY, ISOTOPE EFFECT, VAN HOVE SINGULARITY.
%@visibility shown
%@group LAS-INPE-MCT-BR
%@copyholder SID/SCD
%@secondarykey INPE-15127-PRE/10034
%@issn 0896-1107
%2 sid.inpe.br/iris@1916/2005/03.18.18.00.05
%B Journal of Superconductivity
%P 661-662
%4 sid.inpe.br/iris@1916/2005/03.18.18.00
%D 1995
%V 8
%A Kishore, Ram,
%@dissemination WEBSCI
%@area FISMAT