Messanae Universitas Studiorum

Symmetry approach to electronic states in antiferromagnets; applications to $C_uO_2$ planes of high-$T_c$ materilas

Brazovskii, S. and Luk'yanchuk, I. (1991) Symmetry approach to electronic states in antiferromagnets; applications to $C_uO_2$ planes of high-$T_c$ materilas. Accademia Peloritana dei Pericolanti Classe FF.MM.NN., 69. pp. 207-222.

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Abstract

The group theory approach is developed to describe electronic excitations in antiferromagnetically ordered substances, e.g. in parent phases of High—$T_c$ materials. The irreducible representations are designed in way to give the transparent correspondence to the current microscopical approaches. The generai properties for the gap edges near the magnetic Briliouin zone boundary are described including the interactions to the external magnetic field and to perturbations like the distortions of homogeneous and staggered magnetizations. The symmetry analysis of electronic states in antiferromagnetic phase is applied to $C_u0_2$ - piane of High-$T_c$ materiais. The various allowed states are analyzed for characteristic points at the magnetic Brillouin zone boundary. The results show the way to discriminate experimentally between the two main hypothesis for the nature of carriers: $p \ - \ d$ hybridization versus oxygen picture, Mott-Hubbard gap versus charge transfer gap. The appllications may be given to angle resolved XPS or to optical studies.

Item Type: Article
Subjects: M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Fisiche, Matematiche e Naturali > 1991 > Supplemento 1
M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Giuridiche, Economiche e Politiche > 1991 > Supplemento 1
M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Lettere, Filosofia e belle Arti > 1991 > Supplemento 1
Depositing User: Dr M P
Date Deposited: 01 Oct 2012 11:28
Last Modified: 01 Oct 2012 11:28
URI: http://cab.unime.it/mus/id/eprint/827

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