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Scientific article
English

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

Published inJournal of physics. Condensed matter, vol. 17, no. 26, p. 4135-4145
Publication date2005
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 the influence of pressure up to 10 GPa, using AC calorimetry in a Bridgman-type pressure cell. We showthat the specific-heat jump as well as the bulk Tc are reduced with increasing pressure in accordance with a simple chargetransfer 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 stoichiometric sample without adding atomic disorder.

Citation (ISO format)
LORTZ, Rolf et al. Evolution of the specific-heat anomaly of the high-temperature superconductor YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> under the influence of doping through application of pressure up to 10 GPa. In: Journal of physics. Condensed matter, 2005, vol. 17, n° 26, p. 4135–4145. doi: 10.1088/0953-8984/17/26/012
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