OBSERVATION OF ELECTRON-PHONON INTERACTION WITH SOFT PHONONS IN SUPERCONDUCTING RNI(2)B(2)C

Authors
YANSON IK FISUN VV JANSEN AGM WYDER P CANFIELD PC CHO BK TOMY CV PAUL DM
Citation
Ik. Yanson et al., OBSERVATION OF ELECTRON-PHONON INTERACTION WITH SOFT PHONONS IN SUPERCONDUCTING RNI(2)B(2)C, Physical review letters, 78(5), 1997, pp. 935-938
Citations number
18
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
78
Issue
5
Year of publication
1997
Pages
935 - 938
Database
ISI
SICI code
0031-9007(1997)78:5<935:OOEIWS>2.0.ZU;2-0
Abstract
The point-contact (PC) spectra of the electron-phonon interaction (EPI ) in the superconducting RNi(2)B(2)C (R = Ho, Y) compounds reveal stro ng EPI with low-energy (4-9 meV) phonons, unlike the case of nonsuperc onducting LaNi2B2C. The PC-EPI spectral functions for all three compou nds are determined and lower limits for the EPI interaction parameter lambda estimated. Besides, an unusual suppression of the PC-EPI spectr al intensity by the external magnetic field was observed for the super conducting compounds, unlike the nonsuperconducting one.