THERMODYNAMIC DETERMINATION OF THE ELECTRON-PHONON COUPLING STRENGTH IN YBA2CU3O7-DELTA

Authors
REEVES ME KRESIN VZ WOLF SA
Citation
Me. Reeves et al., THERMODYNAMIC DETERMINATION OF THE ELECTRON-PHONON COUPLING STRENGTH IN YBA2CU3O7-DELTA, Journal of superconductivity, 7(1), 1994, pp. 257-259
Citations number
29
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter
Journal title
Journal of superconductivity → ACNP
ISSN journal
08961107
Volume
7
Issue
1
Year of publication
1994
Pages
257 - 259
Database
ISI
SICI code
0896-1107(1994)7:1<257:TDOTEC>2.0.ZU;2-U
Abstract
The relative enthalpy of YBa2Cu3O7-delta has been measured between the temperatures 273 and 700 K. From these data, we find that the electro nic contribution to the specific heat is linear in temperature with a Sommerfeld constant of 25 +/- 3 mJ/mole . K2. We analyze the data to s how that the normal state of YBa2Cu3O7-delta is described by two condu ction bands and strong electron-phonon coupling. The electron-phonon c oupling is, in fact, sufficient to account for the high T(c) in YBa2Cu O7-delta.