Bose-Einstein condensation at finite momentum and magnon condensation in thin film ferromagnets
J. Hick,
F. Sauli,
A. Kreisel () and
P. Kopietz
The European Physical Journal B: Condensed Matter and Complex Systems, 2010, vol. 78, issue 4, 429-437
Abstract:
We use the Gross-Pitaevskii equation to determine the spatial structure of the condensate density of interacting bosons whose energy dispersion ϵ k has two degenerate minima at finite wave-vectors ± q. We show that in general the Fourier transform of the condensate density has finite amplitudes for all integer multiples of q. If the interaction is such that many Fourier components contribute, the Bose condensate is localized at the sites of a one-dimensional lattice with spacing 2 π/| q|; in this case Bose-Einstein condensation resembles the transition from a liquid to a crystalline solid. We use our results to investigate the spatial structure of the Bose condensate formed by magnons in thin films of ferromagnets with dipole-dipole interactions. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010
Date: 2010
References: View complete reference list from CitEc
Citations:
Downloads: (external link)
http://hdl.handle.net/10.1140/epjb/e2010-10596-7 (text/html)
Access to full text is restricted to subscribers.
Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.
Export reference: BibTeX
RIS (EndNote, ProCite, RefMan)
HTML/Text
Persistent link: https://EconPapers.repec.org/RePEc:spr:eurphb:v:78:y:2010:i:4:p:429-437
Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/10051
DOI: 10.1140/epjb/e2010-10596-7
Access Statistics for this article
The European Physical Journal B: Condensed Matter and Complex Systems is currently edited by P. Hänggi and Angel Rubio
More articles in The European Physical Journal B: Condensed Matter and Complex Systems from Springer, EDP Sciences
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().