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Title: Singlet-triplet Hamiltonian for spin excitations in a Kondo insulator

Abstract

In the nonsymmetric version of the periodic Anderson model for a Kondo insulator, an effective singlet-triplet Hamiltonian H{sub s-t} with indirect antiferromagnetic f-f exchange is constructed, which makes it possible to analyze the dynamic magnetic susceptibility {chi}{sub f}(k, {omega}) of f electrons. Hamiltonian H{sub s-t} is used to describe the experimentally observed dispersion of the three-level spin excitation spectrum in YbB{sub 12}. A distinguishing feature of this analysis is the introduction of small-radius singlet and triplet collective f-d excitations that form low- and high-lying spin bands during motion over the lattice.

Authors:
 [1]
  1. Moscow Institute of Physics and Technology (Russian Federation)
Publication Date:
OSTI Identifier:
21443440
Resource Type:
Journal Article
Journal Name:
Journal of Experimental and Theoretical Physics
Additional Journal Information:
Journal Volume: 111; Journal Issue: 2; Other Information: DOI: 10.1134/S1063776110080169; Copyright (c) 2010 Pleiades Publishing, Ltd.; Journal ID: ISSN 1063-7761
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ABSORPTION SPECTRA; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; DIELECTRIC MATERIALS; ELECTRONIC STRUCTURE; ELECTRONS; EXCITATION; HAMILTONIANS; KONDO EFFECT; MAGNETIC SUSCEPTIBILITY; PERIODICITY; SPIN; TRIPLETS; YTTERBIUM BORIDES; ANGULAR MOMENTUM; BORIDES; BORON COMPOUNDS; ELEMENTARY PARTICLES; ENERGY-LEVEL TRANSITIONS; FERMIONS; LEPTONS; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; MAGNETISM; MATERIALS; MATHEMATICAL OPERATORS; MULTIPLETS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; QUANTUM OPERATORS; RARE EARTH COMPOUNDS; SPECTRA; VARIATIONS; YTTERBIUM COMPOUNDS

Citation Formats

Barabanov, A. F., E-mail: abarabanov@mtu-net.r, and Maksimov, L A. Singlet-triplet Hamiltonian for spin excitations in a Kondo insulator. United States: N. p., 2010. Web. doi:10.1134/S1063776110080169.
Barabanov, A. F., E-mail: abarabanov@mtu-net.r, & Maksimov, L A. Singlet-triplet Hamiltonian for spin excitations in a Kondo insulator. United States. https://doi.org/10.1134/S1063776110080169
Barabanov, A. F., E-mail: abarabanov@mtu-net.r, and Maksimov, L A. 2010. "Singlet-triplet Hamiltonian for spin excitations in a Kondo insulator". United States. https://doi.org/10.1134/S1063776110080169.
@article{osti_21443440,
title = {Singlet-triplet Hamiltonian for spin excitations in a Kondo insulator},
author = {Barabanov, A. F., E-mail: abarabanov@mtu-net.r and Maksimov, L A},
abstractNote = {In the nonsymmetric version of the periodic Anderson model for a Kondo insulator, an effective singlet-triplet Hamiltonian H{sub s-t} with indirect antiferromagnetic f-f exchange is constructed, which makes it possible to analyze the dynamic magnetic susceptibility {chi}{sub f}(k, {omega}) of f electrons. Hamiltonian H{sub s-t} is used to describe the experimentally observed dispersion of the three-level spin excitation spectrum in YbB{sub 12}. A distinguishing feature of this analysis is the introduction of small-radius singlet and triplet collective f-d excitations that form low- and high-lying spin bands during motion over the lattice.},
doi = {10.1134/S1063776110080169},
url = {https://www.osti.gov/biblio/21443440}, journal = {Journal of Experimental and Theoretical Physics},
issn = {1063-7761},
number = 2,
volume = 111,
place = {United States},
year = {Sun Aug 15 00:00:00 EDT 2010},
month = {Sun Aug 15 00:00:00 EDT 2010}
}