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Osofsky, Michael Steven 2015-05-13T15:41:55Z 2015-05-13T15:41:55Z 10000-01-01 1987 1987 The results of two studies of disordered metals near their metal-insulator transition are presented: (i) A detailed comparison of Ge(,x)Au(,1-x) and B(,x)Cu(,1-x) is carried out in zero magnetic field. GeAu, a high Z material, has been shown to exhibit strong spin-orbit effects in a magnetic field while BCu, a low Z material, has been shown to exhibit weak spin-orbit effects. Both materials have similar temperature dependent dc conductivity behavior in zero field and approximately linear mobility edges; (ii) A detailed study of the non-linear dc conductivity of GeAu and C(,x)Cu(,1-x) is carried out for 1.3K < T < 4.2K and for E-fields up to 500V/cm. Analyzing the (sigma)(E) data in the context of an electron gas heating model yields unphysically long electron relaxation times. Alternatively, the E-field can limit renormalization by raising the electron energy above the disordered potential. The system then changes from quantum mechanical scaling to classically diffusive behavior beyond a certain length scale. The temperature and E-field data can then give the characteristic lengths and prefactors for the transition. Made available in DSpace on 2015-05-13T15:41:55Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 8711845.PDF: 4362498 bytes, checksum: d331ebc82c37a924fc202390968e17d7 (MD5) Previous issue date: 1987 Embargo set by: Seth Robbins for item 78614 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 225 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987. http://hdl.handle.net/2142/77403 (UMI)AAI8711845 eng Physics, Condensed Matter Spin-Orbit Scattering and E-Field Effects in Disordered Metals Near the Metal-Insulator Transition (Amorphous Conductors) text University of Illinois at Urbana-Champaign Physics Physics Dissertation Ph.D.