Effects of substituting the rare-earth ion R by nonmagnetic impurities in R2BaNiO5: Theory and numerical density-matrix renormalization-group results

Authors
Ng, TK Lou, JZ Su, ZB
Citation
Tk. Ng et al., Effects of substituting the rare-earth ion R by nonmagnetic impurities in R2BaNiO5: Theory and numerical density-matrix renormalization-group results, PHYS REV B, 61(17), 2000, pp. 11487-11491
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
17
Year of publication
2000
Pages
11487 - 11491
Database
ISI
SICI code
1098-0121(20000501)61:17<11487:EOSTRI>2.0.ZU;2-0
Abstract
In this paper we study the effect of substituting R (rare-earth ion) by non magnetic ions in the spin-1 chain material R2BaNiO5. Using a strong-couplin g expansion and numerical density-matrix renormalization-group calculations , we show that spin-wave bound states are formed at the impurity site. Expe rimental consequences of the bound states are pointed out.