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Title: Novel Longitudinal Mode in the Coupled Quantum Chain Compound KCuF{sub 3}

Abstract

Inelastic neutron scattering measurements are reported that show a new longitudinal mode in the antiferromagnetically ordered phase of the spin-1/2 quasi-one-dimensional antiferromagnet KCuF{sub 3} . This mode signals the crossover from one-dimensional to three-dimensional behavior and indicates a reduction in the ordered spin moment of a spin-1/2 antiferromagnet. The measurements are compared with recent quantum field theory calculations and are found to be in excellent agreement. A feature of the data not predicted by theory is a damping of the mode by decay processes to the transverse spin-wave branches. (c) 2000 The American Physical Society.

Authors:
; ;
Publication Date:
OSTI Identifier:
20217242
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 85; Journal Issue: 4; Other Information: PBD: 24 Jul 2000; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; POTASSIUM COMPOUNDS; COPPER COMPOUNDS; FLUORIDES; NEUTRON DIFFRACTION; INELASTIC SCATTERING; ANTIFERROMAGNETIC MATERIALS; SPIN WAVES; MAGNONS; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Lake, B, Tennant, D A, and Nagler, S E. Novel Longitudinal Mode in the Coupled Quantum Chain Compound KCuF{sub 3}. United States: N. p., 2000. Web. doi:10.1103/PhysRevLett.85.832.
Lake, B, Tennant, D A, & Nagler, S E. Novel Longitudinal Mode in the Coupled Quantum Chain Compound KCuF{sub 3}. United States. https://doi.org/10.1103/PhysRevLett.85.832
Lake, B, Tennant, D A, and Nagler, S E. Mon . "Novel Longitudinal Mode in the Coupled Quantum Chain Compound KCuF{sub 3}". United States. https://doi.org/10.1103/PhysRevLett.85.832.
@article{osti_20217242,
title = {Novel Longitudinal Mode in the Coupled Quantum Chain Compound KCuF{sub 3}},
author = {Lake, B and Tennant, D A and Nagler, S E},
abstractNote = {Inelastic neutron scattering measurements are reported that show a new longitudinal mode in the antiferromagnetically ordered phase of the spin-1/2 quasi-one-dimensional antiferromagnet KCuF{sub 3} . This mode signals the crossover from one-dimensional to three-dimensional behavior and indicates a reduction in the ordered spin moment of a spin-1/2 antiferromagnet. The measurements are compared with recent quantum field theory calculations and are found to be in excellent agreement. A feature of the data not predicted by theory is a damping of the mode by decay processes to the transverse spin-wave branches. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevLett.85.832},
url = {https://www.osti.gov/biblio/20217242}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 4,
volume = 85,
place = {United States},
year = {2000},
month = {7}
}