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Cooper, S.L. Yoon, Seokhyun 2015-09-25T20:02:40Z 2015-09-25T20:02:40Z 10000-01-01 2001 2001 We observed that the metal-insulator transition in Ca3Ru 2O7 is characterized by the opening of correlation charge gap. The out-of-phase c-axis oxygen vibration phonon mode is seen to be closely associated with the metal-insulator transition possibly by modulating the bandwidth of the system. We also observed Raman scattering from two-magnon excitations in the antiferromagnetic phase of Ca3Ru 2O7, from which we could estimate the in-plane spin-spin exchange coupling constant J∥. Importantly, we found that Ca3Ru2O7 does not exhibit strong in-plane magnetic correlations above TN. Made available in DSpace on 2015-09-25T20:02:40Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3030497.pdf: 5884377 bytes, checksum: e8a801e16f30e1ae09aa605c172ba11d (MD5) Previous issue date: 2001 Embargo set by: Seth Robbins for item 81761 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 123 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2001. http://hdl.handle.net/2142/80479 (MiAaPQ)AAI3030497 eng Physics, Condensed Matter Complex Phase Behavior of Exotic Oxides: Optical Spectroscopy Studies text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.