Solitary magnon excitations in a one-dimensional antiferromagnet with Dzyaloshinsky-Moriya interactions
Data(s) |
07/03/2007
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Resumo |
We investigate solitary excitations in a model of a one-dimensional antiferromagnet including a single-ion anisotropy and a Dzyaloshinsky-Moriya antisymmetric exchange interaction term. We employ the Holstein-Primakoff transformation, the coherent state ansatz and the time variational principle. We obtain two partial differential equations of motion by using the method of multiple scales and applying perturbation theory. By so doing, we show that the motion of the coherent amplitude must satisfy the nonlinear Schrodinger equation. We give the single-soliton solution. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Lissouck, D (Lissouck, Daniel); Nguenang, JP (Nguenang, Jean-Pierre).Solitary magnon excitations in a one-dimensional antiferromagnet with Dzyaloshinsky-Moriya interactions,JOURNAL OF PHYSICS-CONDENSED MATTER,MAR 7 2007,19(9):Art. No. 096202 |
Palavras-Chave | #PARAMETER-PRESERVING ANTIFERROMAGNET #FERROMAGNETIC SPIN CHAINS #NONLINEAR EXCITATIONS #EXCHANGE INTERACTION #WEAK FERROMAGNETISM #HEISENBERG CHAIN #ANTI-FERROMAGNET #BOUND-STATE #INDUCED GAP #SOLITONS |
Tipo |
期刊论文 |