𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Exact and model operators for magnon–phonon interactions in antiferromagnets

✍ Scribed by I.F.I. Mikhail; I.M.M. Ismail; M. Ameen

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
229 KB
Volume
406
Category
Article
ISSN
0921-4526

No coin nor oath required. For personal study only.

✦ Synopsis

A theoretical study is given of magnon-phonon interactions in antiferromagnetic materials. The roles of magnons and phonons as heat carriers and as sources of thermal resistance have been taken into consideration. The exact collision operator which represents the magnon-phonon interactions involved in the transport Boltzmann equations has been replaced by a model operator which possesses the same important properties. The effect of other scattering processes that either phonons or magnons are involved has also been investigated. A new expression for the thermal conductivity has been derived. It includes terms which represent both Normal and Umklapp magnon-phonon processes. The results obtained by using the new expression agree quantitatively with the experimental measurements on Fe Cl 2

📜 SIMILAR VOLUMES

From the Hubbard model to a systematic l
From the Hubbard model to a systematic low-energy effective field theory for magnons and holes in an antiferromagnet
✍ Christoph Brügger; Florian Kämpfer; Markus Moser; Michele Pepe; Uwe-Jens Wiese 📂 Article 📅 2007 🏛 Elsevier Science 🌐 English ⚖ 106 KB

The low-energy physics of antiferromagnets is governed by their Goldstone bosons -the magnons -and it is described by a lowenergy effective field theory. In analogy to baryon chiral perturbation theory, we construct the effective field theory for magnons and holes in an antiferromagnet. It is a syst