6533b871fe1ef96bd12d2415
RESEARCH PRODUCT
Electron-phonon interaction in thin copper and gold films
J. T. KarvonenL. J. TaskinenIlari Maasiltasubject
PhysicsCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsScatteringCondensed Matter - Superconductivitychemistry.chemical_elementFOS: Physical sciencesElectronCondensed Matter::Mesoscopic Systems and Quantum Hall Effect01 natural sciencesCopper010305 fluids & plasmasSuperconductivity (cond-mat.supr-con)chemistryImpurityTunnel junctionScattering rateCondensed Matter::Superconductivity0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Condensed Matter::Strongly Correlated Electrons010306 general physicsFermi gasJoule heatingdescription
We have studied the electron-phonon (e-p) interaction in thin Cu and Au films at sub-Kelvin temperatures with the help of the hot electron effect, using symmetric normal metal-insulator-superconductor tunnel junction pairs as thermometers. By Joule heating the electron gas and measuring the electron and the lattice temperatures simultaneously, we show that the electron-phonon scattering rate follows a $T^{4}$ temperature dependence in both metals. The result is in accordance with the theory of e-p scattering in disordered films with vibrating boudaries and impurities, in contrast to the $T^{3}$-law expected for pure samples, and $T^{2}$-law for static disorder.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-10-12 |