Nonlinear Effects in the Dynamic Structure Factor of the Classical Antiferromagnetic Heisenberg Chain in an External Field at Low Temperatures

B. De Raedt; H. De Raedt; J. Fivez

doi:10.1103/PhysRevLett.46.786

Nonlinear Effects in the Dynamic Structure Factor of the Classical Antiferromagnetic Heisenberg Chain in an External Field at Low Temperatures

B. De Raedt, H. De Raedt, J. Fivez

Zernike Institute for Advanced Materials

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Abstract

Is is found that nonlinear effects give rise to anomalies in the spectrum of the antiferromagnetic Heisenberg chain in an external field, even at low temperatures. Divergences in the two-magnon density of states are responsible for additional resonances, besides the usual spin-wave peak, in the dynamic structure factor.

Original language	English
Number of pages	3
Journal	Physical Review Letters
Volume	46
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.46.786
Publication status	Published - 1981

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title = "Nonlinear Effects in the Dynamic Structure Factor of the Classical Antiferromagnetic Heisenberg Chain in an External Field at Low Temperatures",

abstract = "Is is found that nonlinear effects give rise to anomalies in the spectrum of the antiferromagnetic Heisenberg chain in an external field, even at low temperatures. Divergences in the two-magnon density of states are responsible for additional resonances, besides the usual spin-wave peak, in the dynamic structure factor.",

author = "Raedt, {B. De} and Raedt, {H. De} and J. Fivez",

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AB - Is is found that nonlinear effects give rise to anomalies in the spectrum of the antiferromagnetic Heisenberg chain in an external field, even at low temperatures. Divergences in the two-magnon density of states are responsible for additional resonances, besides the usual spin-wave peak, in the dynamic structure factor.

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DO - 10.1103/PhysRevLett.46.786

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