| Автор | F B Anders |
| Автор | Qi Qin |
| Автор | N Grewe |
| Дата выпуска | 1992-08-31 |
| dc.description | The interplay of a direct ferromagnetic exchange interaction I>0 between local and band states and an indirect antiferromagnetic exchange -J<0 via hybridization V is studied using an expanded version of the Anderson impurity model in the highly correlated regime. A simple scaling idea is put forward for the dependence of the free energy, one-particle spectra, T-matrix and susceptibility on the size of hybridization and direct exchange. It describes the many-body regime J>>I in terms of a universal picture as well as the crossover near J approximately=I to the trivial regime J<<I, the latter being characterized by an effective elastic one-particle scattering problem. These physical arguments are supported by extensive numerical calculations in the framework of perturbation theory with respect to I and V. It is also indicated how I may be included into new post-NCA theories of the Kondo effect. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Competing local exchange mechanisms: a validity test of a simple scaling hypothesis |
| Тип | paper |
| DOI | 10.1088/0953-8984/4/35/008 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 4 |
| Первая страница | 7229 |
| Последняя страница | 7246 |
| Аффилиация | F B Anders; Inst. fur Festkorperphys., Tech. Hochschule, Darmstadt, Germany |
| Аффилиация | Qi Qin; Inst. fur Festkorperphys., Tech. Hochschule, Darmstadt, Germany |
| Аффилиация | N Grewe; Inst. fur Festkorperphys., Tech. Hochschule, Darmstadt, Germany |
| Выпуск | 35 |
