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Negative thermoelectric power of over-doped Bi2Sr2CaCu2O8 superconductor
- Source :
-
Physica C . Dec2010 Supplement 1, Vol. 470, pS203-S204. 0p. - Publication Year :
- 2010
-
Abstract
- Abstract: The thermoelectric power S(T) studies of Bi2Sr2CaCu2O8 (Bi2212) samples, including as-processed Partially Melted (Bi2212-PM) and 800°C O2-annealed (Bi2212-O2) are reported here. While Bi2212-PM sample is near optimum doping regime, Bi2212-O2 is an over-doped sample. values obtained through S(T) data match very well with those deduced from the R(T). Interestingly, S(T) behavior of the optimally-doped Bi2212-PM sample is seen to be positive in whole temperature range, it is found negative for the over-doped Bi2212-O2 sample above . The observed negative S(T) dependence of the over-doped Bi2212-O2 is in accord with the recent band structure calculations and is in line with the theoretical investigations on a van Hove singularity in electronic density of states in HTSc compounds. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09214534
- Volume :
- 470
- Database :
- Academic Search Index
- Journal :
- Physica C
- Publication Type :
- Academic Journal
- Accession number :
- 55791287
- Full Text :
- https://doi.org/10.1016/j.physc.2009.12.012