ELECTRON SOUND IN ALUMINUM - ELECTRON-ELECTRON SCATTERING

The relaxation parameters of charge carriers in aluminum are measured by investigating the attenuation of electron sound and acoustic wave t ransfer under Doppler-shifted cyclotron resonance. It is shown that th e electron-electron relaxation rate at spherical parts of the hole she et of the Fermi surface is close to the results of the theory (A. Jaqu ier et al., Phys. Rev. B52, 13005 (1995)) that takes into account the electron-electron interaction with the exchange of virtual phonons. At the same time, the experimental anisotropy of the electron-electron s cattering is considerably smaller than the calculated value. A noticea ble anisotropy of the electron-impurity collisions frequency in alumin um is discovered. (C) 1998 American Institute of Physics. [S1063-777X( 98)00503-9].