Instability of the ferromagnetic ground state in a quantum spin chain with competing interactions

I. Harada; T. Tonegawa

doi:10.1016/S0304-8853(10)80082-4

Instability of the ferromagnetic ground state in a quantum spin chain with competing interactions

I. Harada, T. Tonegawa

Educational Center for Researchers of the Next Generation

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Abstract

The study of two-magnon spectra in a ferromagnetic chain with competing interactions suggests that the soft two-magnon bound state leads the ferromagnetic ground state to a new ground state with intermediate magnetization. Numerical calculations for finite chains support this result. We discuss the new state by adopting a quasi-particle picture for the bound state.

Original language	English
Pages (from-to)	234-236
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	90-91
DOIs	https://doi.org/10.1016/S0304-8853(10)80082-4
Publication status	Published - Jan 1 1990

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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abstract = "The study of two-magnon spectra in a ferromagnetic chain with competing interactions suggests that the soft two-magnon bound state leads the ferromagnetic ground state to a new ground state with intermediate magnetization. Numerical calculations for finite chains support this result. We discuss the new state by adopting a quasi-particle picture for the bound state.",

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AB - The study of two-magnon spectra in a ferromagnetic chain with competing interactions suggests that the soft two-magnon bound state leads the ferromagnetic ground state to a new ground state with intermediate magnetization. Numerical calculations for finite chains support this result. We discuss the new state by adopting a quasi-particle picture for the bound state.

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Instability of the ferromagnetic ground state in a quantum spin chain with competing interactions

Abstract

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