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ETDEWEB   /       /    Electronic structure of the Y Ba{sub 2} Cu{sub 3} O{sub 7-x} high temperature superconductor ceramic; Estrutura eletronica da ceramica supercondutora de alta temperatura Y Ba{sub 2} Cu{sub 3} O{sub 7-x}

Electronic structure of the Y Ba{sub 2} Cu{sub 3} O{sub 7-x} high temperature superconductor ceramic; Estrutura eletronica da ceramica supercondutora de alta temperatura Y Ba{sub 2} Cu{sub 3} O{sub 7-x}

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Abstract

We investigate the electronic structure of superconductor Y Ba{sub 2} Cu{sub 3} O{sub 7-x} through a molecular cluster approach. The calculations are performed self consistently through a semi empirical L.C.A.O. technique, where different charge states are considered. The correlation effects are taken into account by configuration interaction procedure (INDO/CI). The results for the larger cluster yield a density of states showing a strong p-d covalency resulting in a width of around 8,0 eV for the valence band. The optical excitations is analyzed in detail and compared with the experimental data. (author) 18 refs., 2 figs., 1 tab.
Authors:
Lima, G A.R. [1] 
  1. UNESP, Guaratingueta, SP (Brazil). Faculdade de Engenharia. Dept. de Fisica e Quimica
Publication Date:
Dec 31, 1990
Product Type:
Conference
Report Number:
INIS-BR-3692; CONF-900022-
Reference Number:
SCA: 360202; PA: AIX-30:013665; EDB-99:042078; SN: 99002073312
Resource Relation:
Conference: 11. ADUNESP seminar, 11. Seminario da ADUNESP - Associacao dos Docentes da UNESP, Guaratingueta (Brazil), 1990; Other Information: DN: 18 refs., 2 figs., 1 tab.; PBD: 1990
Subject:
36 MATERIALS SCIENCE; CERAMICS; COMPOSITE MATERIALS; ELECTRONIC STRUCTURE; HIGH-TC SUPERCONDUCTORS; SUPERCONDUCTING COMPOSITES; SUPERCONDUCTIVITY; YTTRIUM; YTTRIUM COMPOUNDS; YTTRIUM OXIDES
OSTI ID:
329718
Research Organizations:
Associacao de docentes da UNESP, Guaratingueta, SP (Brazil)
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
Other: ON: DE99617997; TRN: BR99H0011013665
Availability:
INIS; OSTI as DE99617997
Submitting Site:
BRN
Size:
10 p.
Announcement Date:
Apr 23, 1999

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Citation Formats

Lima, G A.R. Electronic structure of the Y Ba{sub 2} Cu{sub 3} O{sub 7-x} high temperature superconductor ceramic; Estrutura eletronica da ceramica supercondutora de alta temperatura Y Ba{sub 2} Cu{sub 3} O{sub 7-x}. Brazil: N. p., 1990. Web.
Lima, G A.R. Electronic structure of the Y Ba{sub 2} Cu{sub 3} O{sub 7-x} high temperature superconductor ceramic; Estrutura eletronica da ceramica supercondutora de alta temperatura Y Ba{sub 2} Cu{sub 3} O{sub 7-x}. Brazil.
Lima, G A.R. 1990. "Electronic structure of the Y Ba{sub 2} Cu{sub 3} O{sub 7-x} high temperature superconductor ceramic; Estrutura eletronica da ceramica supercondutora de alta temperatura Y Ba{sub 2} Cu{sub 3} O{sub 7-x}." Brazil.
@misc{etde_329718,
title = {Electronic structure of the Y Ba{sub 2} Cu{sub 3} O{sub 7-x} high temperature superconductor ceramic; Estrutura eletronica da ceramica supercondutora de alta temperatura Y Ba{sub 2} Cu{sub 3} O{sub 7-x}}
 author = {Lima, G A.R.}
 abstractNote = {We investigate the electronic structure of superconductor Y Ba{sub 2} Cu{sub 3} O{sub 7-x} through a molecular cluster approach. The calculations are performed self consistently through a semi empirical L.C.A.O. technique, where different charge states are considered. The correlation effects are taken into account by configuration interaction procedure (INDO/CI). The results for the larger cluster yield a density of states showing a strong p-d covalency resulting in a width of around 8,0 eV for the valence band. The optical excitations is analyzed in detail and compared with the experimental data. (author) 18 refs., 2 figs., 1 tab.}
 place = {Brazil}
 year = {1990}
 month = {Dec}
 }