Dynamical properties of spins and holes in carrier doped quantum Haldane chain

T. Yokoo, S. Itoh, D. Kawana, H. Yoshizawa, J. Akimitsu

Research output: Contribution to journalConference article

3 Citations (Scopus)

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). Recently multi degrees of freedom in cooperation with quantum spins are focused. We present here spin dynamics in the lightly hole doped Nd2-xCaxBaNiO5 (x=0.035), 1D Haldane system by means of pulsed neutron inelastic scattering method. One-magnon band with a spin gap (Haldane gap) was visible with the decrease of the zone boundary energy to 60 meV. In contrast, the spin gap slightly increases. Dynamical structures inside spin gap upon carrier doping showing incommensurate structure centered at the magnetic zone center was newly observed which is possibly originating from the doped holes in Haldane chains.

Original languageEnglish
Article number012045
JournalJournal of Physics: Conference Series
Volume502
Issue number1
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes
Event1st Conference on Light and Particle Beams in Materials Science 2013, LPBMS 2013 - Tsukuba, Japan
Duration: Aug 29 2013Aug 31 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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