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Effect of interlayer interaction on T c with number of layers in high T c cuprate superconductors
Author(s) -
Khandka Sarita,
Singh P.
Publication year - 2007
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/pssb.200542285
Subject(s) - superconductivity , pairing , cuprate , condensed matter physics , transition temperature , superconducting transition temperature , physics , materials science , chemistry
The effect of interlayer interaction on transition temperature ( T c ) with number of layers ( n ) has been investigated in layered high T c superconductors within the BCS theory, irrespective of the pairing mechanism. The expression for interlayer correlation ( γ ) has been obtained and its implications have been studied. T c has been calculated numerically for n = 1, 2 and 3. Interlayer interactions have been found crucial for superconductivity and enhancing T c . It is also found that mere addition of layers does not increase T c , but the density of states ( N 0 ) should also increase with addition of layers. The results are in general agreement with experiments and explain the trend of T c with n satisfactorily. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)