Experimental evidence for the Haldane gap in a spin-1, nearly isotropic, antiferromagnetic chain

Neutron scattering has shown that the lowest spin excitations in the spin-1 antiferromagnet CsNiCl sub(3) in its one-dimensional phase occur at finite frequency. After allowance for the known weak interchain coupling the gap is found to be in good agreement with recent numerical calculations. The re...

Full description

Saved in:

Bibliographic Details
Published in:	Physical review letters Vol. 56; no. 4; pp. 371 - 374
Main Authors:	BUYERS, W. J. L, MORRA, R. M, ARMSTRONG, R. L, HOGAN, M. J, GERLACH, P, HIRAKAWA, K
Format:	Journal Article
Language:	English
Published:	Ridge, NY American Physical Society 27-01-1986
Subjects:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Physics Spin waves Temperature Cesium Nickel Chlorides Mixed Transition metal Compounds Spin wave Antiferromagnetic materials Heisenberg model Spin wave dispersion Ground state Very low temperature Experimental study Inorganic compound Neutron scattering One dimensional model
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Neutron scattering has shown that the lowest spin excitations in the spin-1 antiferromagnet CsNiCl sub(3) in its one-dimensional phase occur at finite frequency. After allowance for the known weak interchain coupling the gap is found to be in good agreement with recent numerical calculations. The results support the Haldane conjecture that in integral-spin chains with isotropic interactions a gap separates the ground state from the excitations.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.56.371