ISSN:
1573-7357
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The lattice parameters and T c of Y 1−y Ca y Ba 2 Cu 3 O x have been determined under pressure up to 10 GPa using a diamond anvil cell. The results are used to test the extended charge transfer model that connects the pressure effect on T c to an intrinsic dT c,max /dp and a pressure induced hole doping dn h /dp, the latter being caused by charge transfer from the CuO chains to the CuO 2 planes. dn h /dp and dT c,max /dp are usually assumed to be constant with respect to pressure p. However, our experiments show that the usage of this model gives a poor description of the experimental T c (p) values. We connected the extended charge transfer model to the pressure induced changes of the compressibilities. With this ansatz the calculated T c (p) values show an excellent agreement with the experimentally determined values.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022507009029
