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Weissman, Michael B. Garfunkel, Glen Adam 2011-05-18T15:52:57Z 2011-05-18T15:52:57Z 10000-01-01 1989 The 1/f noise in strongly disordered metallic CCu and SiAu systems was studied in the temperature range 2-300 K. The temperature, frequency, and electric and magnetic field dependencies were found to be consistent with the predictions of the universal conductance fluctuation theory in the low temperature regime. Statistical properties of the noise in these systems were also studied in specially fabricated nanometer scale samples. Non-Gaussian effects and other aspects of the noise in these samples were used to probe the kinetics of the low energy excitations. In the range 4-30 K ample evidence was found of spectral features and 2 level and 3 level switching events with both tunneling and activated kinetics. This is the first observation of individual low energy excitations in amorphous metallic conductors. The noise in a majority of the systems exhibited anomalous non-Gaussian effects not consistent with a picture of randomly fluctuating independent two level systems. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-18T15:52:57Z No. of bitstreams: 1 1989_garfunkel.pdf: 9223125 bytes, checksum: 80ef732fd8e2d5e1615d1b433d10be9e (MD5) Made available in DSpace on 2011-05-18T15:52:57Z (GMT). No. of bitstreams: 1 1989_garfunkel.pdf: 9223125 bytes, checksum: 80ef732fd8e2d5e1615d1b433d10be9e (MD5) Previous issue date: 1989 Restriction data tranferred 2014-07-01T11:14:00-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-18T15:52:57Z Item is restricted indefinitely. Thesis U of I Only 3473765 http://hdl.handle.net/2142/23941 en 1989 Glen Adam Garfunkel universal conductance fluctuations glassy kinetics 1/f noise disordered metallic systems CCu SiAu Universal conductance fluctuations, glassy kinetics, and 1/f noise Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.