Équipe de Recherche en Physique de l'Information Quantique


author = {Reulet, B., Prober, D.E.},
title = {The noise thermal impedance of a diffusive wire},
journal = {Physical Review Letters},
year = {2005},
volume = {95, 066602},
number = {6},
pages = {1-4},
art_number = {066602},
note = {cited By (since 1996) 8},
url = {http://www.scopus.com/inward/record.url?eid = 2-s2.0-27144546392&partnerID = 40&md5 = a87079b345a702fd2ec0f712e0dbedd5},
affiliation = {Departments of Applied Physics and Physics, Yale University, New Haven, CT 06520-8284, United States; Laboratoire de Physique des Solides, UMR8502, Université Paris-Sud, 91405 Orsay, France},
abstract = {The current noise density S2 of a conductor in equilibrium, the Johnson noise, is determined by its temperature T: S2 = 4kBTG, with G the conductance. The sample's noise temperature TN = S2/(4kBG) generalizes T for a system out of equilibrium. We introduce the "noise thermal impedance" of a sample as the ratio δTNω/δPJω of the amplitude δTNω of the oscillation of TN when heated by an oscillating power δPJω at frequency ω. For a macroscopic sample, it is the usual thermal impedance. We show for a diffusive wire how this (complex) frequency-dependent quantity gives access to the electron-phonon interaction time in a long wire and to the diffusion time in a shorter one, and how its real part may also give access to the electron-electron inelastic time. These times are not simply accessible from the frequency dependence of S2 itself. 2005 The American Physical Society.},
document_type = {Article},
source = {Scopus}}