Abstract
A quantum mechanical phenomenology for heavy-fermion systems is formulated. The effective Lagrangian for low-energy excitations contains a localized spin-fluctuation part which is coupled with an itinerant fermion part. Each part represents the dual nature of strongly correlated f electrons. The coupling parameter is fixed by comparison with the Fermi-liquid theory for the Anderson model. The comparison also fixes the localized spin-fluctuation spectrum. As an advantage over the Fermi-liquid description the present model takes into account the RKKY interaction and non-linear effects of spin polarization. A formula for the magnetic equation of state is derived which is applicable to the metamagnetism and weak antiferromagnetism in heavy-fermion systems.
| Original language | English |
|---|---|
| Pages (from-to) | 2831-2840 |
| Number of pages | 10 |
| Journal | journal of the physical society of japan |
| Volume | 59 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1990 Jan 1 |
Keywords
- Anderson lattice
- Kondo effect
- duality
- heavy fermion
- metamagnetism
- weak antiferromagnetism
ASJC Scopus subject areas
- Physics and Astronomy(all)