publication . Preprint . Article . 2005

Evolution of the specific-heat anomaly of the high-temperature superconductor YBa2Cu3O7 under the influence of doping through application of pressure up to 10 GPa

Rolf Lortz; Alain Junod; Didier Jaccard; Yuxing Wang; Christoph Meingast; Takahiko Masui; Setsuko Tajima;
Open Access English
  • Published: 17 Jun 2005
Abstract
The evolution of the specific-heat anomaly in the overdoped range of a single crystal of the high-temperature superconductor YBa2Cu3O7 has been studied under influence of pressure up to 10 GPa, using AC calorimetry in a Bridgman-type pressure cell. We show that the specific-heat jump as well as the bulk Tc are reduced with increasing pressure in accordance with a simple charge-transfer model. This new method enables us through pressure-induced charge transfer to study the doping dependence of the superconducting transition, as well as the evolution of the superconducting condensation energy on a single stoichometric sample without adding atomic disorder.
Subjects
arXiv: Condensed Matter::Superconductivity
free text keywords: Condensed Matter - Superconductivity, General Materials Science, Condensed Matter Physics, Specific heat, Single crystal, Condensation, High-temperature superconductivity, law.invention, law, Physics, Stoichiometry, Calorimetry, Superconductivity, Doping
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