Effects of substituting rare-earth ion R by non-magnetic impurities in $R_{2}BaNi{O}_5$ - theory and numerical DMRG results

Abstract

In this paper we study the effect of substituting R (rare-earth ion) by non-magnetic ions in the spin-1 chain material $R_{2}BaNi{O}_5$. 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.

5 pages, 4 postscript figures

References in corpus (2)

• Polarized-neutron study of longitudinal Haldane-gap excitations in Nd${}_2$BaNiO${}_5$
• Heisenberg Spin-One Chain in Staggered Magnetic Field : A Density Matrix Renormalization Group Study

Cited by in corpus (2)

• New Trends in Density Matrix Renormalization
• Excitation spectrum and Density Matrix Renormalization Group iterations