Elementary excitations for the two-dimensional quantum Heisenberg antiferromagnet

Guanhua Chen; Hong Qiang Ding; William A. Goddard

doi:10.1103/PhysRevB.46.2933

Elementary excitations for the two-dimensional quantum Heisenberg antiferromagnet

Guanhua Chen
, Hong Qiang Ding
, William A. Goddard

Beckman Institute

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

The excitation spectrum of the antiferromagnetic spin-1/2 Heisenberg Hamiltonian H=tsumJSj on L×L lattices is evaluated by a projector quantum Monte Carlo method. These results suggest that the exact spectrum for the finite lattice is ωZ(L)ωkSW, for all k, where ωkSW=4JS 1-γk2 with γk=(coskx+cosky)/2 is from linear-spin-wave theory. We find Z(L)=ZE+B/L3, leading to ZE=1.21±0.03 for L=. A comparison with experiments on La2CuO4 is discussed.

langue originale	Anglais
Pages (de - à)	2933-2938
Nombre de pages	6
journal	Physical Review B
Volume	46
Numéro de publication	5
Les DOIs	https://doi.org/10.1103/PhysRevB.46.2933
état	Publié - 1 janv. 1992
Modification externe	Oui

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10.1103/PhysRevB.46.2933

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title = "Elementary excitations for the two-dimensional quantum Heisenberg antiferromagnet",

abstract = "The excitation spectrum of the antiferromagnetic spin-1/2 Heisenberg Hamiltonian H=tsumJSj on L×L lattices is evaluated by a projector quantum Monte Carlo method. These results suggest that the exact spectrum for the finite lattice is ωZ(L)ωkSW, for all k, where ωkSW=4JS 1-γk2 with γk=(coskx+cosky)/2 is from linear-spin-wave theory. We find Z(L)=ZE+B/L3, leading to ZE=1.21±0.03 for L=. A comparison with experiments on La2CuO4 is discussed.",

author = "Guanhua Chen and Ding, \{Hong Qiang\} and Goddard, \{William A.\}",

year = "1992",

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doi = "10.1103/PhysRevB.46.2933",

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AU - Ding, Hong Qiang

AU - Goddard, William A.

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N2 - The excitation spectrum of the antiferromagnetic spin-1/2 Heisenberg Hamiltonian H=tsumJSj on L×L lattices is evaluated by a projector quantum Monte Carlo method. These results suggest that the exact spectrum for the finite lattice is ωZ(L)ωkSW, for all k, where ωkSW=4JS 1-γk2 with γk=(coskx+cosky)/2 is from linear-spin-wave theory. We find Z(L)=ZE+B/L3, leading to ZE=1.21±0.03 for L=. A comparison with experiments on La2CuO4 is discussed.

AB - The excitation spectrum of the antiferromagnetic spin-1/2 Heisenberg Hamiltonian H=tsumJSj on L×L lattices is evaluated by a projector quantum Monte Carlo method. These results suggest that the exact spectrum for the finite lattice is ωZ(L)ωkSW, for all k, where ωkSW=4JS 1-γk2 with γk=(coskx+cosky)/2 is from linear-spin-wave theory. We find Z(L)=ZE+B/L3, leading to ZE=1.21±0.03 for L=. A comparison with experiments on La2CuO4 is discussed.

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DO - 10.1103/PhysRevB.46.2933

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JO - Physical Review B

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Elementary excitations for the two-dimensional quantum Heisenberg antiferromagnet

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