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

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	2933-2938
Number of pages	6
Journal	Physical Review B
Volume	46
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.46.2933
Publication status	Published - 1 Jan 1992
Externally published	Yes

Access to Document

10.1103/PhysRevB.46.2933

Cite this

@article{b591000ede7547baa95f77a8f9242a49,

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",

month = jan,

day = "1",

doi = "10.1103/PhysRevB.46.2933",

language = "English",

volume = "46",

pages = "2933--2938",

journal = "Physical Review B",

issn = "0163-1829",

number = "5",

}

TY - JOUR

T1 - Elementary excitations for the two-dimensional quantum Heisenberg antiferromagnet

AU - Chen, Guanhua

AU - Ding, Hong Qiang

AU - Goddard, William A.

PY - 1992/1/1

Y1 - 1992/1/1

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.

UR - https://www.scopus.com/pages/publications/0006761280

U2 - 10.1103/PhysRevB.46.2933

DO - 10.1103/PhysRevB.46.2933

M3 - Article

AN - SCOPUS:0006761280

SN - 0163-1829

VL - 46

SP - 2933

EP - 2938

JO - Physical Review B

JF - Physical Review B

IS - 5

ER -

Elementary excitations for the two-dimensional quantum Heisenberg antiferromagnet

Abstract

Access to Document

Other files and links

Fingerprint

Cite this