Structural modifications in bismuth cuprates: Effects on the electronic structure and Fermi surface

1995 ◽  
Vol 51 (5) ◽  
pp. 3128-3133 ◽  
Author(s):  
D. J. Singh ◽  
W. E. Pickett
Keyword(s):  
Electronic Structure ◽  
Fermi Surface ◽  
Structural Modifications ◽  
Bismuth Cuprates

scholarly journals Electronic Structure and the Fermi Surface ofPuCoGa5andNpCoGa5

2003 ◽  
Vol 90 (20) ◽  
Author(s):  
Takahiro Maehira ◽  
Takashi Hotta ◽  
Kazuo Ueda ◽  
Akira Hasegawa
Keyword(s):  
Electronic Structure ◽  
Fermi Surface

scholarly journals Occupied electronic structure and Fermi surface ofYBa2Cu3O6.8

1991 ◽  
Vol 44 (17) ◽  
pp. 9500-9507 ◽  
Author(s):  
G. Mante ◽  
R. Claessen ◽  
A. Huss ◽  
R. Manzke ◽  
M. Skibowski ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Fermi Surface

scholarly journals Positron Annihilation Studies of the Electronic Structure and Fermiology of High-Tc Superconductors

1993 ◽  
Vol 48 (1-2) ◽  
pp. 398-405 ◽  
Author(s):  
L. C. Smedskjaer ◽  
A. Bansil
Keyword(s):  
Electronic Structure ◽  
Fermi Surface ◽  
Positron Annihilation ◽  
Normal State ◽  
Theoretical Work ◽  
High Tc Superconductors ◽  
Band Theory ◽  
High Tc ◽  
Remarkable Agreement ◽  
Conventional Picture

Abstract We discuss the application of the positron annihilation angular correlation (ACAR) spectroscopy for investigating the electronic structure and Fermiology of high-Tc superconductors, with focus on the YBa2Cu3O7 system where most of the experimental and theoretical work has to date been concentrated. Detailed comparisons between the measured 2D-ACAR positron spectra and the corresponding band theory predictions show a remarkable agreement (for the normal state), indicat-ing that the electronic structure and Fermi surface of this material is described reasonably by the conventional picture.

Electronic structure, magnetic, and Fermi-surface properties ofUPd2Al3

1994 ◽  
Vol 50 (21) ◽  
pp. 15834-15842 ◽  
Author(s):  
L. M. Sandratskii ◽  
J. Kübler ◽  
P. Zahn ◽  
I. Mertig
Keyword(s):  
Electronic Structure ◽  
Fermi Surface ◽  
Surface Properties

Disordered misfit [Ca2CoO3][CoO2]1.62 structure revisited via a new intrinsic modulation

2008 ◽  
Vol 64 (2) ◽  
pp. 144-153 ◽  
Author(s):  
Hervé Muguerra ◽  
Dominique Grebille ◽  
Françoise Bourée
Keyword(s):  
Electronic Structure ◽  
Single Crystal ◽  
Diffraction Experiment ◽  
X Ray Diffraction ◽  
Neutron Diffraction Experiment ◽  
X Ray ◽  
Structural Modifications ◽  
Local Ordering ◽  
Powder Neutron Diffraction ◽  
Modulation Vector

The structure of the thermoelectric lamellar misfit cobalt oxide [Ca2CoO3][CoO2]1.62 was refined again using single-crystal X-ray diffraction data. A new commensurate intrinsic modulation was observed involving a modulation vector orthogonal to the misfit direction (⅔,0,−⅓). The five-dimensional superspace group is C2/m(1δ0)(α0γ)gm and the structure was solved using a commensurate approximation. A new model is given involving an occupation modulation of the split sites of the [CoO] layer. This [CoO] layer can be described by triple chains running along b. The residual disorder along b can then be explained by the assumption of a local ordering with two types of clusters: CoO2 and Co5O4. A powder neutron diffraction experiment confirmed the ordering evidenced by the single-crystal X-ray diffraction study, but was not sufficient by itself to deal with this double modulated scheme. The new intrinsic modulation is destroyed by partial metal substitutions in the [CoO] layer. The structural modifications of this layer directly influence the physical properties which are related to the electronic structure of the [CoO2] layers.

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