TY - JOUR
T1 - Anomalous temperature and disorder dependence of the electron-phonon scattering time in impure metals
AU - Lin, Juhn-Jong
AU - Zhong, Y. L.
AU - Kao, L. Y.
AU - Meikap, A. K.
PY - 2003/5
Y1 - 2003/5
N2 - We have measured the electron-phonon scattering time, τep, in disordered metals at liquid-helium temperatures, using weak-localization method. The temperature and disorder dependence of τep is determined for AgPd and AuPd thick films, and V100-xAlx alloys. In all three cases, we find an anomalous temperature and disorder dependence of τep-1∝T2ℓ, where ℓ is the electron elastic mean free path. This temperature and disorder behavior cannot be explained in terms of current theoretical concepts for the electron-phonon interaction in impure conductors. Current theory predicts a form of either τep-1 ∝ T4ℓ or τep-1 ∝ T2ℓ-1 in the dirty limit, depending on the nature of the defects.
AB - We have measured the electron-phonon scattering time, τep, in disordered metals at liquid-helium temperatures, using weak-localization method. The temperature and disorder dependence of τep is determined for AgPd and AuPd thick films, and V100-xAlx alloys. In all three cases, we find an anomalous temperature and disorder dependence of τep-1∝T2ℓ, where ℓ is the electron elastic mean free path. This temperature and disorder behavior cannot be explained in terms of current theoretical concepts for the electron-phonon interaction in impure conductors. Current theory predicts a form of either τep-1 ∝ T4ℓ or τep-1 ∝ T2ℓ-1 in the dirty limit, depending on the nature of the defects.
KW - Electron-phonon interaction
KW - Impure conductors
KW - Weak localization
UR - http://www.scopus.com/inward/record.url?scp=0038179542&partnerID=8YFLogxK
U2 - 10.1016/S1386-9477(02)01028-7
DO - 10.1016/S1386-9477(02)01028-7
M3 - Conference article
AN - SCOPUS:0038179542
SN - 1386-9477
VL - 18
SP - 302
EP - 303
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
IS - 1-3
T2 - 23rd International Conference on Low Temperature Physics
Y2 - 20 August 2002 through 27 August 2002
ER -