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Low-energy excitations of Yb As in a magnetic field |
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| Authors: | G. Uimin Y. Kudasov P. Fulde A. Ovchinnikov |
| Affiliation: | (1) Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany, DE;(2) Russian Federal Nuclear Center - VNNIEF, Sarov, Russia, RU;(3) Landau Institute for Theoretical Physics, Moscow, Russia, RU |
| Abstract: | We discuss the effects of an applied magnetic field on the low-energy excitations in the low temperature phase of Yb4As3. We show also why the magnetic interaction of the Yb3+ ions is nearly of an isotropic Heisenberg spin-1/2 type. A small anisotropy due to an intrachain dipolar interaction leads to the opening of a gap when a magnetic field is applied. The model agrees with available experimental data. Simple experiments are suggested in order to further test the present theory. Received 3 February 1999 |
| Keywords: | PACS. 71.27.+a Strongly correlated electron systems heavy fermions - 75.30.Ds Spin waves - 75.20.Hr Local moment in compounds and alloys Kondo effect, valence fluctuations, heavy fermions |
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