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Proceedings Paper

Electronic Raman scattering in cuprate superconductors and parent insulating phases
Author(s): Miles V. Klein; Ran Liu; D. Salamon; Girsh Blumberg; D. Reznik; S. Lance Cooper; Wonchoon C. Lee; Don M. Ginsberg; S.-W. Cheong
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Paper Abstract

Raman scattering from charge and spin excitation in cuprates is reviewed. The two-magnon resonance Raman profile is used to determine the most probable energy for photon-assisted charge transfer leading to exchange between two spins. The difference between this energy and that for absorption is attributed to spin relaxation (spin polaron) effects. Two-magnon spectra in superconducting cuprates are presented. It is argued that their presence is evidence that the antiferromagnetic correlation length is equal to or greater than three lattice constants. The recently-discovered Raman-active excitons are described and possible assignments of them are discussed. It is pointed out that in highly correlated metals and insulators, the mechanisms for light scattering that are familiar for doped semiconductors or conventional metals are not necessarily the only ones that are operative.

Paper Details

Date Published: 10 August 1994
PDF: 9 pages
Proc. SPIE 2158, Oxide Superconductor Physics and Nano-Engineering, (10 August 1994); doi: 10.1117/12.182677
Show Author Affiliations
Miles V. Klein, Univ. of Illinois/Urbana-Champaign (United States)
Ran Liu, Univ. of Illinois/Urbana-Champaign (United States)
D. Salamon, Univ. of Illinois/Urbana-Champaign (United States)
Girsh Blumberg, Univ. of Illinois/Urbana-Champaign (United States)
D. Reznik, Univ. of Illinois/Urbana-Champaign (United States)
S. Lance Cooper, Univ. of Illinois/Urbana-Champaign (United States)
Wonchoon C. Lee, Univ. of Illinois/Urbana-Champaign (South Korea)
Don M. Ginsberg, Univ. of Illinois/Urbana-Champaign (United States)
S.-W. Cheong, AT&T Bell Labs. (United States)

Published in SPIE Proceedings Vol. 2158:
Oxide Superconductor Physics and Nano-Engineering
Davor Pavuna; Ivan Bozovic, Editor(s)

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