Effects of substituting rare-earth ion R by non-magnetic impurities in $R_2BaNiO_5$ - theory and numerical DMRG results

Details Effects of substituting rare-earth ion R by non-magnetic impurities in $R_2BaNiO_5$ - theory and numerical DMRG results Effects of substituting rare-earth ion R by non-magnetic impurities in $R_2BaNiO_5$ - theory and numerical DMRG results

1999-11-11

arxiv.org/abs/cond-mat/9911155v2

Phys. Rev. B 61, 11487 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 postscript figures

Scientific paper

10.1103/PhysRevB.61.11487

In this paper we study the effect of substituting R (rare-earth ion) by
non-magnetic ions in the spin-1 chain material $R_2BaNiO_5$. Using a
strong-coupling expansion and numerical density matrix renormalization group
calculations, we show that spin-wave bound states are formed at the impurity
site. Experimental consequences of the bound states are pointed out.

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