Spin and hole dynamics in carrier-doped quantum haldane chain

T. Yokoo, S. Itoh, S. Ibuka, H. Yoshizawa, J. Akimitsu

Research output: Contribution to journalConference articlepeer-review

Abstract

Quantum spins in one-dimensional (1D) chains exhibit characteristic features such as the Haldane gap (S 1) and the spin-Peierls state (S 1/2). Multiple degrees of freedom associated with quantum spins have recently become a focus of attention. We present here the spin dynamics in lightly hole-doped Nd2-xCaxBaNiO5 (x 0.1), a 1D Haldane system, using pulsed neutron inelastic scattering. The entire dispersion of the 1D Haldane chain was clearly observed with a ∼14 meV spin gap (Haldane gap) at the magnetic zone center. Below the gap, much spectral weight was observed, indicating an in-gap state possibly originating from the doped holes in Haldane chains.

Original languageEnglish
Article number042035
JournalJournal of Physics: Conference Series
Volume568
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event27th International Conference on Low Temperature Physics, LT 2014 - Buenos Aires, Argentina
Duration: Aug 6 2014Aug 13 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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