ElectronicRainan scattering in cuprate superconductors and parent insulating phases

M. V. Klein, R. Liu, D. Salamon, G. Blumberg, D. Reznik, S. L. Cooper, W. C. Lee, D. M. Ginsberg, S. W. Cheong

Research output: Contribution to journalConference article

Abstract

Raman scattering from charge and spin excitations 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.

Original languageEnglish (US)
Pages (from-to)100-108
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume2158
DOIs
StatePublished - Aug 10 1994
EventOxide Superconductor Physics and Nano-Engineering 1994 - Los Angeles, United States
Duration: Jan 23 1994Jan 29 1994

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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