2026-09-21T13:37:57Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/22715 2023-07-10 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

http://hdl.handle.net/2142/22715 eng Copyright 1996 Marley, Arley Cleveland Weissman, Michael B. Marley, Arley Cleveland 2011-05-07T13:49:04Z 2011-05-07T13:49:04Z 10000-01-01 1996 The low frequency dynamics of the charge-density waves in NbSe$\sb3$ and TaS$\sb3$ were investigated using low frequency conductance fluctuations. Simultaneous measurements of the fluctuations in the voltage and the differential resistance revealed a theory of threshold voltage fluctuations can only partially describe some of the fluctuations in the I-V curve. Noise measurements performed with an ac drive current characterized the fluctuations and showed that other parameters, in addition to the threshold, must be fluctuating to fully account for the fluctuations. In mesoscopic samples, the observation of discrete switching in the voltage allowed estimates of the dynamical coherence length ranging from $\rm{\approx}100\mu m$ up to the entire sample length of $\rm{\approx}1000\mu m.$ Experiments to determine if the low frequency dynamics are equilibrium or nonequilibrium processes showed that the dynamics involve a combination of equilibrium and nonequilibrium dynamics. The equilibrium dynamics can be described by a rough free energy landscape with extreme sensitivity of the local details of the landscape to changes in the temperature or current. The nonequilibrium dynamics were directly related to the drive current. Made available in DSpace on 2011-05-07T13:49:04Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9624428.pdf: 6160526 bytes, checksum: 27ce0b376de7a839fae779eab332fe3a (MD5) Previous issue date: 1996 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:59:30Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:28:04-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9624428 (UMI)AAI9624428 Physics, Condensed Matter Low frequency charge-density wave dynamics text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.