Record Details

Fluctuation conductivity in cuprate superconductors

DSpace at IIT Bombay

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Field Value
 
Title Fluctuation conductivity in cuprate superconductors
 
Creator BHATIA, SN
 
Subject layered superconductors
single-crystals
magnetoconductivity
bscco
tbcco
resistivity
superconductive order parameter
fluctuations
 
Description We have measured the in-plane resistivity of Bi2Sr2CaCu2O8+delta and Tl2Ba2 CaCu2O8+delta single crystals in the temperature range 70-300 K. The thermodynamic fluctuations in the conductivity of both the samples start around similar to 125 K. We find the Lawrence and Doniach [1] model to be inadequate to describe the fluctuation conductivity in these materials. The modification suggested by Ramallo et al [4] where by the conductivity is enhanced due to the presence of two superconducting layers in each unit cell is also not adequate. We suggest the fluctuation conductivity to be reduced due to the reduction in the density of states (DOS) of the quasiparticles which results due to the formation of Cooper pairs at the onset of the fluctuations. The data agrees with the theory proposed by Dorin et al [5] which takes into account this reduction in DOS.
 
Publisher INDIAN ACADEMY SCIENCES
 
Date 2011-10-22T10:06:22Z
2011-12-15T09:10:52Z
2011-10-22T10:06:22Z
2011-12-15T09:10:52Z
2002
 
Type Article; Proceedings Paper
 
Identifier PRAMANA-JOURNAL OF PHYSICS,58,817-825
0304-4289
http://dx.doi.org/10.1007/s12043-002-0177-2
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14875
http://hdl.handle.net/100/1707
 
Source International Symposium on Advances in Superconductivity and Magnetism: Materials, Mechanisms, and Devices (ASMM2D-2001),MUMBAI, INDIA,SEP 25-28, 2001
 
Language English