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Michael Weissman Caplan, David 2015-09-25T20:03:16Z 2015-09-25T20:03:16Z 10000-01-01 2009 2009 We use electronic transport noise measurements in order to probe normal state properties of high temperature superconductors with the goal of providing further detail about the environment in which the necessary pairing of electrons occurs. We observe an unusual noise component near and below about 200 K in the normal state of underdoped YBCO and Ca-YBCO films. We use several experimental noise-transport techniques in order to elucidate dynamic, thermodynamic and symmetry properties of the underlying fluctuations that cause this excess noise. We have found that this region of noise displays many features, such as large fluctuators, aging effects and a complicated magnetic sensitivity, that one would expect for symmetry-breaking collective electronic state. Made available in DSpace on 2015-09-25T20:03:16Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3391894.pdf: 4811461 bytes, checksum: 6ad142294e3421c92a279881c4558313 (MD5) Previous issue date: 2009 Embargo set by: Seth Robbins for item 81886 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 122 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009. http://hdl.handle.net/2142/80604 (MiAaPQ)AAI3391894 eng Physics, High Temperature Electronic Noise Studies of Underdoped High Temperature Superconductors text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.