One-dimensional antiferromagnetic coupling in the low-carrier heavy-electron system Yb{sub 4}As{sub 3}: The role of charge ordering
- Department of Physics, Tokyo Metropolitan University, Tokyo 192-03 (Japan)
- Laboratoire Leon Brillouin, CEA-CNRS, CEA/Saclay, 91191 Gif-sur-Yvette (France)
- Department of Technology, Niigata University, Niigata 950-21 (Japan)
- Department of Physics, Tohoku University, Sendai 980-77 (Japan)
Inelastic-neutron-scattering experiments on Yb{sub 4}As{sub 3} revealed the existence of low-energy spin excitations, which are characteristic of a one-dimensional Heisenberg-type antiferromagnetic coupling at low temperatures where charge ordering takes place. Superimposed on the one-dimensional spin excitations, an unusual magnetic response is also observed around the one-dimensional zone center. These results strongly suggest that the heavy-electron behavior in Yb{sub 4}As{sub 3} is a unique phenomenon caused by charge ordering; it results from the fact that the compound contains doped one-dimensional 4f{sup 1} hole chains with strong on-site f-electron correlations. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 544958
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 18; Other Information: PBD: Nov 1997
- Country of Publication:
- United States
- Language:
- English
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