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2006•Journal of Liaoning Normal UniversityRequires access

The Magnon Lifetime of One Dimensional Insulated Ferromagnetic Chain at T→0 K

Luo Hong-chao

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Abstract

A magnon-phonon interaction model is built in one dimensional insulated ferromagnetic chain.By using Matsubara Green function theory,we have studied the magnon damping(-Im∑~(*(1))(k)),and calculated the magnon damping-Im∑~(*(1))(k)curve in the Brillouin Zone for different parameters in the system.It is concluded that at the boundary of Brillouin Zone there is a strong magnon damping.But the magnon damping is very small on Zone of small wave vectors,and magnon damping has maximal at the boundary of Brillouin Zone.According to Expression-Im∑~(*(1))(k)=(/(2τ),)the magnon lifetime can be discussed.

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What this paper is about

A magnon-phonon interaction model is built in one dimensional insulated ferromagnetic chain.By using Matsubara Green function theory,we have studied the magnon damping(-Im∑~(*(1))(k)),and calculated the magnon damping-Im∑~(*(1))(k)curve in the Brillouin Zone for different parameters in the system.It is concluded that at the boundary of Brillouin Zone there is a strong magnon damping.But the magnon damping is very small on Zone of small wave vectors,and magnon damping has maximal at the boundary of Brillouin Zone.According to Expression-Im∑~(*(1))(k)=(/(2τ),)the magnon lifetime can be discussed.

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Available abstract

A magnon-phonon interaction model is built in one dimensional insulated ferromagnetic chain.By using Matsubara Green function theory,we have studied the magnon damping(-Im∑~(*(1))(k)),and calculated the magnon damping-Im∑~(*(1))(k)curve in the Brillouin Zone for different parameters in the system.It is concluded that at the boundary of Brillouin Zone there is a strong magnon damping.But the magnon damping is very small on Zone of small wave vectors,and magnon damping has maximal at the boundary of Brillouin Zone.According to Expression-Im∑~(*(1))(k)=(/(2τ),)the magnon lifetime can be discussed.

Key concepts: Magnon, Brillouin zone, Condensed matter physics, Physics, Ferromagnetism, Boundary (topology), Phonon, Mathematics

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