SUPERCONDUCTIVITY DUE TO CHARGE DENSITY WAVE INSTABILITY IN Ba1−xKxBiO3 COMPOUNDS
- 20 November 1989
- journal article
- research article
- Published by World Scientific Pub Co Pte Ltd in Modern Physics Letters B
- Vol. 03 (17) , 1267-1273
- https://doi.org/10.1142/s021798498900193x
Abstract
Recent experiments seem to indicate that the superconductivity in Ba 1−x K x BiO 3 type compound occurs in the metallic state before its transformation to the charge density wave (CDW) state as the doping parameter x is reduced. Assuming the local breathing modes around Bi-atoms are responsible for both the CDW and superconducting states. We show that the superconducting transition temperature T c can be substantially enhanced as x approaches the CDW instability from the metallic side. Similar calculation has been carried out for a two-dimensional system and the results are in qualitative agreement with a recent Monte Carlo simulation.Keywords
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