Abstract
The lowest states of an undoped copper-oxide cluster are determined numerically and fitted by a spin Hamiltonian containing a cyclic 4-spin exchange interaction. The size of this interaction is found to be about a quarter of the size of the nearest-neighbor Heisenberg exchange. The 4-spin exchange leads to a renormalization of spin-wave properties and to extra features in magnetic Raman scattering. The calculated exchange parameters are consistent with the observed spin-wave velocity.
Original language | English |
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Pages (from-to) | 263-266 |
Number of pages | 4 |
Journal | Physica C: Superconductivity and its applications |
Volume | 167 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 1990 May 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering