Structure of End States for a Haldane Spin Chain

Authors

M. Kenzelmann, Johns Hopkins University
G. Xu, Brookhaven National Laboratory
I. A. Zaliznyak, Brookhaven National Laboratory
C. Broholm, Johns Hopkins University
J. F. DiTusa, Louisiana State University
G. Aeppli, The London Centre for Nanotechnology
T. Ito, National Institute of Advanced Industrial Science and Technology
K. Oka, National Institute of Advanced Industrial Science and Technology
H. Takagi, The University of Tokyo

Document Type

Article

Publication Date

1-1-2003

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 [Formula presented]. 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 [[Formula presented] at [Formula presented]]. Continuum contributions to the chain-end spectrum indicate interchain segment interactions. We also observe a finite size blueshift of the Haldane gap. © 2003 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

4

Recommended Citation

Kenzelmann, M., Xu, G., Zaliznyak, I., Broholm, C., DiTusa, J., Aeppli, G., Ito, T., Oka, K., & Takagi, H. (2003). Structure of End States for a Haldane Spin Chain. Physical Review Letters, 90 (8), 4. https://doi.org/10.1103/PhysRevLett.90.087202