Acta Physica Polonica B

Vol. 34, No. 2, February 2003, page 795

Elastic Anomalies of \kappa -(ET)2Cu[N(CN)2]Br Associated with the Insulator-to-Metal Crossover

T. Simizu, N. Yoshimoto, Y. Nakanishi, M. Yoshizawa

Longitudinal sound velocity has been measured for organic superconductors \kappa -(ET)2Cu[N(CN)2]Br as a function of temperature. We measured the velocity of the sound propagating along both parallel and perpendicular to the two-dimensional conduction plane. The sound velocity of both directions shows a remarkable anisotropic behavior below TM, in addition to the anomaly at TM = 37 K associated with Insulator-to-Metal crossover.

PACS numbers: 74.25.Ld, 74.70.Kn

  Paper (gzipped PostScript  85 KB)
 
Table of Contents Back to Number 2 contents