1998年1月
d-site substitution effects in the d-p model
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- ,
- 巻
- 67
- 号
- 1
- 開始ページ
- 29
- 終了ページ
- 32
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJ.67.29
- 出版者・発行元
- PHYSICAL SOC JAPAN
Effects of d-site substitution in the d-p model simulating a CuO2-plane in high-T-c cuprates are investigated using the slave boson technique and the 1/N-expansion method. It is found that nonmagnetic impurities, e.g., Zn, substituted for Cu, strongly scatter the p-holes and drastically decrease hole densities at the neighboring O-sites. In the low doping region; the decrease reduces the Kondo temperature T-K at the neighboring Cu-sites. The repulsion U-pd between holes on the nearest neighbor Cu-and O-sites; which is known to enhance the charge susceptibility in the pure systems without impurities, turns out to promote the reduction of Tic due to the nonmagnetic impurity. Then, Cu d-spins in the vicinity of the impurity behave as local moments at temperatures higher than the reduced T-K.
- リンク情報
- ID情報
-
- DOI : 10.1143/JPSJ.67.29
- ISSN : 0031-9015
- Web of Science ID : WOS:000071769300009