Two-magnon Raman scattering in (La1-xSrx)2CuO4

Shunji Sugai, Shin Ichi Shamoto, Masatoshi Sato

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127 Citations (Scopus)

Abstract

The two-dimensional two-magnon peak in (La1-xSrx)2CuO4 decreases rapidly from x=0 to x=0.01. For x>0.03 scattering is observed over a very wide energy region from low energy to over 4000 cm-1. This indicates that the correlation length of the two-dimensional spin order decreases rapidly from x=0 to x=0.01. This decrease can be related to the rapid decrease of the three-dimensional antiferromagnetic transition temperature (TN), while at x>0.03 the correlation still retains a short length and a short time. At x<0.01 the scattering is in a resonant state with narrow electronic levels of which transition energy is about 18 000 cm-1. The narrowness of these energy levels, and the simultaneous extinction of resonance and the two-magnon scattering, suggest that these are localized levels relating to the Cu spins.

Original languageEnglish
Pages (from-to)6436-6439
Number of pages4
JournalPhysical Review B
Volume38
Issue number10
DOIs
Publication statusPublished - 1988

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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