Phonon spectra in the conductance of Andreev junctions on Bi2223 at high pressure

Authors
Svistunov, VM Tarenkov, VY D'yachenko, AI Aoki, R
Citation
Vm. Svistunov et al., Phonon spectra in the conductance of Andreev junctions on Bi2223 at high pressure, PHYSICA C, 314(3-4), 1999, pp. 205-210
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
314
Issue
3-4
Year of publication
1999
Pages
205 - 210
Database
ISI
SICI code
0921-4534(19990320)314:3-4<205:PSITCO>2.0.ZU;2-B
Abstract
A softening of the high-frequency phonon modes in Bi2223 (T-c = 110 K) at h igh pressure is found. These modes correspond to the oxygen breathing mode and also the Cu-O bending modes. Qualitatively, the result obtained explain s the observed rise in R = 2 Delta/kT(c)(P) ratio in the framework of the s trong electron-phonon interaction model. However, the analysis of the R-rat io in the framework of the s + d model has revealed a possibility of explan ation of the observed rise in R(P) also for the d-wave pairing. (C) 1999 Pu blished by Elsevier Science B.V. All rights reserved.