Anomalous temperature and disorder dependence of the electron-phonon scattering time in impure metals

Juhn-Jong Lin; Y. L. Zhong; L. Y. Kao; A. K. Meikap

doi:10.1016/S1386-9477(02)01028-7

Anomalous temperature and disorder dependence of the electron-phonon scattering time in impure metals

Juhn-Jong Lin^*, Y. L. Zhong, L. Y. Kao, A. K. Meikap

^*此作品的通信作者

物理研究所

研究成果: Conference article › 同行評審

摘要

We have measured the electron-phonon scattering time, τ_ep, in disordered metals at liquid-helium temperatures, using weak-localization method. The temperature and disorder dependence of τ_ep is determined for AgPd and AuPd thick films, and V_100-xAl_x alloys. In all three cases, we find an anomalous temperature and disorder dependence of τ_ep^-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 τ_ep^-1 ∝ T⁴ℓ or τ_ep^-1 ∝ T²ℓ^-1 in the dirty limit, depending on the nature of the defects.

原文	English
頁（從 - 到）	302-303
頁數	2
期刊	Physica E: Low-Dimensional Systems and Nanostructures
卷	18
發行號	1-3
DOIs	https://doi.org/10.1016/S1386-9477(02)01028-7
出版狀態	Published - 5月 2003
事件	23rd International Conference on Low Temperature Physics - Hiroshima, 日本持續時間: 20 8月 2002 → 27 8月 2002

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10.1016/S1386-9477(02)01028-7

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title = "Anomalous temperature and disorder dependence of the electron-phonon scattering time in impure metals",

abstract = "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.",

keywords = "Electron-phonon interaction, Impure conductors, Weak localization",

author = "Juhn-Jong Lin and Zhong, {Y. L.} and Kao, {L. Y.} and Meikap, {A. K.}",

year = "2003",

month = may,

doi = "10.1016/S1386-9477(02)01028-7",

language = "English",

volume = "18",

pages = "302--303",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier B.V.",

number = "1-3",

note = "23rd International Conference on Low Temperature Physics ; Conference date: 20-08-2002 Through 27-08-2002",

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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 -

Anomalous temperature and disorder dependence of the electron-phonon scattering time in impure metals

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