摘要
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.
原文 | English |
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頁(從 - 到) | 6436-6439 |
頁數 | 4 |
期刊 | Physical Review B |
卷 | 38 |
發行號 | 10 |
DOIs | |
出版狀態 | Published - 1988 |
All Science Journal Classification (ASJC) codes
- 凝聚態物理學