| Autor: |
K, Matan, D, Grohol, D G, Nocera, T, Yildirim, A B, Harris, S H, Lee, S E, Nagler, Y S, Lee |
| Rok vydání: |
2006 |
| Zdroj: |
Physical review letters. 96(24) |
| ISSN: |
0031-9007 |
| Popis: |
The spin wave excitations of the S=5/2 kagomé lattice antiferromagnet KFe3(OH)6(SO4)2 have been measured using high-resolution inelastic neutron scattering. We directly observe a flat mode which corresponds to a lifted "zero energy mode," verifying a fundamental prediction for the kagomé lattice. A simple Heisenberg spin Hamiltonian provides an excellent fit to our spin wave data. The antisymmetric Dzyaloshinskii-Moriya interaction is the primary source of anisotropy and explains the low-temperature magnetization and spin structure. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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