OBSERVATION OF SUPERCONDUCTIVITY-INDUCED PHONON FREQUENCY CHANGES IN THE ORGANIC SUPERCONDUCTOR K-(BEDT-TTF)(2)CU(NCS)(2)

Authors
PINTSCHOVIUS L RIETSCHEL H SASAKI T MORI H TANAKA S TOYOTA N LANG M STEGLICH F
Citation
L. Pintschovius et al., OBSERVATION OF SUPERCONDUCTIVITY-INDUCED PHONON FREQUENCY CHANGES IN THE ORGANIC SUPERCONDUCTOR K-(BEDT-TTF)(2)CU(NCS)(2), Europhysics letters, 37(9), 1997, pp. 627-632
Citations number
37
Categorie Soggetti
Physics
Journal title
Europhysics letters → ACNP
ISSN journal
02955075
Volume
37
Issue
9
Year of publication
1997
Pages
627 - 632
Database
ISI
SICI code
0295-5075(1997)37:9<627:OOSPFC>2.0.ZU;2-C
Abstract
Frequencies of transverse acoustic phonons were measured by inelastic neutron scattering on single crystals of the organic superconductor ka ppa-(BEDT-TTF)(2)Cu(NCS)(2). Significant frequency changes were observ ed for phonon energies close to the superconducting energy gap 2 Delta on cooling the sample below the superconducting transition temperatur e T-c = 9.15 K. The observed relative shifts are large compared to tho se in the classical superconductor Wb and also larger than the shifts found recently in the high-T-c superconductor YBa2Cu3O7.