Resonant two-magnon Raman scattering in cuprate antiferromagnetic insulators

G. Blumberg; P. Abbamonte; M. V. Klein; W. C. Lee; D. M. Ginsberg; L. L. Miller; A. Zibold

doi:10.1103/PhysRevB.53.R11930

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Resonant two-magnon Raman scattering in cuprate antiferromagnetic insulators

G. Blumberg, P. Abbamonte, M. V. Klein, W. C. Lee, D. M. Ginsberg, L. L. Miller, and A. Zibold

Phys. Rev. B 53, R11930(R) – Published 1 May 1996

Abstract

We present results of low-temperature two-magnon resonance Raman excitation profile measurements for single-layer ${Sr}_{2}$ Cu $O_{2}$ ${Cl}_{2}$ and bilayer $Y {Ba}_{2} {Cu}_{3} O_{6 + δ}$ antiferromagnets over the excitation region from 1.65 to 3.05 eV. These data reveal composite structure of the two-magnon line shape and strong nonmonotic dependence of the scattering intensity on excitation energy. We analyze these data using the triple resonance theory of Chubukov and Frenkel [Phys. Rev. Lett. 74, 3057 (1995)] and deduce information about magnetic interaction and band parameters in these materials.

Received 20 February 1996

DOI:https://doi.org/10.1103/PhysRevB.53.R11930

Authors & Affiliations

G. Blumberg

National Science Foundation, Science and Technology Center for Superconductivity and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080 and Institute of Chemical Physics and Biophysics, Rävala 10, Tallinn EE0001, Estonia

P. Abbamonte, M. V. Klein, W. C. Lee^*, and D. M. Ginsberg

National Science Foundation, Science and Technology Center for Superconductivity and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801-3080

L. L. Miller

Ames Laboratory, Iowa State University, Ames, Iowa 50011

A. Zibold

Department of Physics, University of Florida, Gainesville, Florida 32611

^*Present address: Department of Physics, Sook-Myung Women's University, Seoul, Korea.

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Vol. 53, Iss. 18 — 1 May 1996

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