Structure of End States for a Haldane Spin Chain

M. Kenzelmann, G. Xu, I. A. Zaliznyak, C. Broholm, J. F. DiTusa, G. Aeppli, T. Ito, K. Oka, and H. Takagi

Phys. Rev. Lett. 90, 087202 – Published 26 February 2003; Erratum Phys. Rev. Lett. 90, 109902 (2003)

Abstract

Inelastic neutron scattering was used to probe edge states in a quantum spin liquid. The experiment was performed on finite length antiferromagnetic spin-1 chains in $Y_{2} {B a N i}_{1 - x} {M g}_{x} O_{5}$ . At finite fields, there is a Zeeman resonance below the Haldane gap. The wave-vector dependence of its intensity provides direct evidence for staggered magnetization at chain ends, which decays exponentially towards the bulk [ $ξ = 8 (1)$ at $T = 0.1 K$ ]. Continuum contributions to the chain-end spectrum indicate interchain segment interactions. We also observe a finite size blueshift of the Haldane gap.

Received 29 November 2002
Publisher error corrected 27 February 2003

DOI:https://doi.org/10.1103/PhysRevLett.90.087202

Corrections

27 February 2003

Erratum

Publisher’s Note: Structure of End States for a Haldane Spin Chain [Phys. Rev. Lett. 90, 087202 (2003)]

M. Kenzelmann, G. Xu, I. A. Zaliznyak, C. Broholm, J. F. DiTusa, G. Aeppli, T. Ito, K. Oka, and H. Takagi

Phys. Rev. Lett. 90, 109902 (2003)

Authors & Affiliations

M. Kenzelmann^1,2, G. Xu³, I. A. Zaliznyak³, C. Broholm^1,2, J. F. DiTusa⁴, G. Aeppli^5,6, T. Ito⁷, K. Oka⁷, and H. Takagi⁸

¹Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218
²NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
³Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000
⁴Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803
⁵London Centre for Nanotechnology, Gower Street, London WC1E 6BT, United Kingdom
⁶NEC Research Institute, 4 Independence Way, Princeton, New Jersey 08540
⁷National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8562, Japan
⁸Graduate School of Frontier Sciences, University of Tokyo, Hongo, Bukyo-ku, Tokyo 113-8656, Japan

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Issue

Vol. 90, Iss. 8 — 28 February 2003

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