| Issue |
Europhys. Lett.
Volume 61, Number 6, March 2003
|
|
|---|---|---|
| Page(s) | 838 - 844 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2003-00310-1 | |
| Published online | 01 March 2003 | |
Size-dependent magnon modes of a Heisenberg ferromagnet
1
Division of Quantum Chemistry, University of Leuven Celestijnenlaan 200F, B-3001 Leuven, Belgium
2
Institute of Applied Physics - Chişinǎu, Moldova
Received:
21
May
2002
Accepted:
9
January
2003
We prove the existence of new bound magnon excitations in Heisenberg ferromagnets due to finite-size effects. To describe these effects, we develop an analytical approximation which is a modification of the widely used continuum approach. Thus, for the square lattice we find 4 branches of bound two-magnon excitations in addition to the two ones known before. It is shown that some of the new modes remain well separated from all the others even for a macroscopic system.
PACS: 75.10.Jm – Quantized spin models / 75.30.Ds – Spin waves
© EDP Sciences, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.