Premium
Intra‐ and Interatomic Electron Correlation in an Orbitally Nondegenerate Narrow Band
Author(s) -
Heiner E.,
Schneider J.,
Haubenreisser W.
Publication year - 1973
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220550206
Subject(s) - electron , ferromagnetism , magnetism , condensed matter physics , atom (system on chip) , ground state , paramagnetism , electronic band structure , atomic physics , spin (aerodynamics) , physics , quantum mechanics , computer science , thermodynamics , embedded system
The influence of interatomic interaction between the electrons on the occurrence of ferro‐magnetism in a nondegenerate narrow band is investigated. Using the Green's function technique it is shown that the unperturbed band splits due to the interatomic interaction into spin‐polarized sub‐bands. For a simple cubic tight‐binding band the ground state energy for the paramagnetic and ferromagnetic configurations are calculated and compared. It is found that in the strongly correlated limit and for sufficiently large number of electrons per atom the ferromagnetic state is stable.