Linear spin wave theory for single-Q incommensurate magnetic structures

Autor:	Toth, S., Lake, B.
Rok vydání:	2014
Předmět:	Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
DOI:	10.1088/0953-8984/27/16/166002
Popis:	Linear spin wave theory provides the leading term in the calculation of the excitation spectra of long-range ordered magnetic systems as a function of $1/\sqrt{S}$. This term is acquired using the Holstein-Primakoff approximation of the spin operator and valid for small $\delta S$ fluctuations of the ordered moment. We propose an algorithm that allows magnetic ground states with general moment directions and single-Q incommensurate ordering wave vector using a local coordinate transformation for every spin and a rotating coordinate transformation for the incommensurability. Finally we show, how our model can determine the spin wave spectrum of the magnetic C-site langasites with incommensurate order. Comment: 12 pages, 3 figures, cite this paper if you use SpinW (http://www.psi.ch/spinw)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1402.6069 Zobrazit plný text záznamu View this record from Arxiv