2026-09-20T17:24:11Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/21613 2023-07-10 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

Mochel, J.M. La Madrid, Marissa Alisangco 2011-05-07T13:13:53Z 2011-05-07T13:13:53Z 10000-01-01 1990 Measurements of the electron-phonon relaxation time are carried out, using both a direct and indirect method, in three dimensional films of C$\sb{1-x}$Cu$\sb x$ and Si$\sb{1-x}$Au$\sb x$ in the temperature range 0.3K-4K. The electron-phonon resistance and thermal boundary resistance are also measured. The directly measured relaxation times for C$\sb{1-x}$Cu$\sb x$ can agree with theoretical predictions if a longitudinal sound speed similar to that of graphite and a longitudinal to transverse speed ratio similar to that of silicate glasses are used. The results for the Si$\sb{1-x}$Au$\sb x$ only qualitatively agree with theory. The measured thermal resistances are in reasonable agreement with other experiments. Comparison of the direct and indirect measurements of the relaxation times reveal that the specific heat coefficient $\gamma$ behaves approximately like $T\sp{-.6}$ in C$\sb{1-x}$Cu$\sb x$ below 1K, in qualitative agreement with current theories describing the behavior of disordered, interacting electrons near the metal-insulator transition. Legacy ETDs are only available to UIUC Users without author permission U of I Only AAI9026238 (UMI)AAI9026238 http://hdl.handle.net/2142/21613 eng Copyright 1990 owned by Marissa Alisangco La Madrid Physics Condensed Matter Thermodynamics of disordered carbon(1-x)copper(x) and silicon(1-x)gold(x) near the metal-insulator transition text https://hdl.handle.net/2142/25206 Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.