The antiferromagnetic ground state of CuO2 layers is studied at the mean-field level within a slave-boson approach to a multiband Hubbard model which includes the dx2-y2 orbital for Cu and the px and py orbitals for O. The stability of the antiferromagnetism is tested by varying the separation between p- and d-hole energy levels and by allowing direct O-O hopping. Results for the effective exchange integral, the antiferromagnetic gap, the percentage of d character of holes at the Fermi level, and the Cu magnetic moment are discussed by varying. © 1990 The American Physical Society.
ANTIFERROMAGNETISM OF CUO2 LAYERS WITHIN A SLAVE-BOSON APPROACH / E., Arrigoni; G., Strinati; Castellani, Claudio. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 41:7(1990), pp. 4838-4841. [10.1103/physrevb.41.4838]
ANTIFERROMAGNETISM OF CUO2 LAYERS WITHIN A SLAVE-BOSON APPROACH
CASTELLANI, Claudio
1990
Abstract
The antiferromagnetic ground state of CuO2 layers is studied at the mean-field level within a slave-boson approach to a multiband Hubbard model which includes the dx2-y2 orbital for Cu and the px and py orbitals for O. The stability of the antiferromagnetism is tested by varying the separation between p- and d-hole energy levels and by allowing direct O-O hopping. Results for the effective exchange integral, the antiferromagnetic gap, the percentage of d character of holes at the Fermi level, and the Cu magnetic moment are discussed by varying. © 1990 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
