Title

Magnetic and charge dynamics in a doped one-dimensional transition metal oxide

Document Type

Article

Publication Date

1-1-1994

Abstract

We have measured the electrical resistivity, polarized x-ray absorption, and magnetic neutron scattering for Y2-xCaxBaNi1-yZnyO5 to determine how doping affects the charge and spin dynamics of a Haldane chain compound. While Zn doping, which severs the NiO chains, increases the resistivity beyond that of the pure material, Ca doping introduces holes, residing mainly in the 2pz, orbital of the oxygens in the NiO chains. Both dopants lead to simple finite size effects above the Haldane gap. In addition, we have discovered that Ca doping yields substantial magnetic states below the Haldane gap. © 1994 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

1857

Last Page

1860

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