Spin fluctuations in mixed magnetic chains
โ Scribed by S.W. Lovesey
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- English
- Weight
- 205 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0038-1098
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๐ SIMILAR VOLUMES
In this paper we review the experimental situation concerning magnetic fluctuations and excitations in quasi-Heisenberg antiferromagnetic (AF) chains, as observed in prototypes of the classical (TMMC), S = l/2 (CPC) and S = 1 (NENP, CsNiCI,) systems, by inelastic and quasielastic neutron scattering.
Using a generalized random phase approach quantum fluctuations beyond the helical mean-field states of the Hubbard model off half filling are discussed. The collective mode spectrum is shown to exhibit spin-charge mixing and is found to be strongly renormalized by coupling to low-energy incoherent p