Oxygen-disorder effects on the electronic structure of YBa sub 2 Cu sub 3 O sub 6+. delta

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.8933· OSTI ID:5212889

Modak, S ^[1]; Moran-Lopez, J L ^[2]

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1. Saha Institute of Nuclear Physics, 92, Acharya Prafulla Chandra Road, Calcutta-700009, India (IN)
2. Instituto de Fisica, Universidad Autonoma de San Luis Potosi, San Luis Potosi, (Mexico)

The electronic structure of YBa{sub 2}Cu{sub 3}O{sub 6+{delta}} is calculated in the framework of the tight-binding Hamiltonian. The effects of the oxygen concentration {delta} and its spatial ordering in the basal plane are studied by means of the Bethe-lattice method. The local density of states at the various Cu and O sites are calculated as a function of {delta} and of the degree of oxygen ordering. Special attention is given to the number of holes {ital h} in both the ordered and disordered systems for various concentrations. We find that the electronic structure at the CuO{sub 2} planes is almost insensitive to the degree of order, in contrast to the local density of states of sites located in the basal plane.

• OSTI ID: 5212889
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:13; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

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