scholarly journals Effect of orbital relaxation on the band structure of cuprate superconductors and implications for the superconductivity mechanism

2014 ◽  
Vol 90 (18) ◽  
Author(s):  
J. E. Hirsch
Keyword(s):  
Band Structure ◽  
Cuprate Superconductors ◽  
Orbital Relaxation

scholarly journals Band structure of overdoped cuprate superconductors: Density functional theory matching experiments

2019 ◽  
Vol 99 (22) ◽  
Author(s):  
K. P. Kramer ◽  
M. Horio ◽  
S. S. Tsirkin ◽  
Y. Sassa ◽  
K. Hauser ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Band Structure ◽  
Density Functional ◽  
Cuprate Superconductors ◽  
Functional Theory

scholarly journals First-principles band structure and FLEX approach to the pressure effect onTcof the cuprate superconductors

2013 ◽  
Vol 454 ◽  
pp. 012021 ◽  
Author(s):  
Hirofumi Sakakibara ◽  
Katsuhiro Suzuki ◽  
Hidetomo Usui ◽  
Kazuhiko Kuroki ◽  
Ryotaro Arita ◽  
...  
Keyword(s):  
Band Structure ◽  
First Principles ◽  
Cuprate Superconductors ◽  
Pressure Effect

scholarly journals Doping-dependent quasiparticle band structure in cuprate superconductors

1997 ◽  
Vol 55 (6) ◽  
pp. R3414-R3418 ◽  
Author(s):  
R. Eder ◽  
Y. Ohta ◽  
G. A. Sawatzky
Keyword(s):  
Band Structure ◽  
Cuprate Superconductors ◽  
Quasiparticle Band

Quantitative structure determination of interfaces through Z-contrast imaging and electron energy loss spectroscopy

1996 ◽  
Vol 54 ◽  
pp. 104-105
Author(s):  
S. J. Pennycook ◽  
P. D. Nellist ◽  
N. D. Browning ◽  
P. A. Langjahr ◽  
M. Rühle
Keyword(s):  
Grain Boundaries ◽  
Cuprate Superconductors ◽  
Structure Refinement ◽  
3D Structure ◽  
Real Space ◽  
Contrast Imaging ◽  
Coordination Polyhedra ◽  
Burgers Vector ◽  
Z Contrast ◽  
Contrast Image

The simultaneous use of Z-contrast imaging with parallel detection EELS in the STEM provides a powerful means for determining the atomic structure of grain boundaries. The incoherent Z-contrast image of the high atomic number columns can be directly inverted to their real space arrangement, without the use of preconceived structure models. Positions and intensities may be accurately quantified through a maximum entropy analysis. Light elements that are not visible in the Z-contrast image can be studied through EELS; their coordination polyhedra determined from the spectral fine structure. It even appears feasible to contemplate 3D structure refinement through multiple scattering calculations.The power of this approach is illustrated by the recent study of a series of SrTiC>3 bicrystals, which has provided significant insight into some of the basic issues of grain boundaries in ceramics. Figure 1 shows the structural units deduced from a set of 24°, 36° and 65° symmetric boundaries, and 24° and 45° asymmetric boundaries. It can be seen that apart from unit cells and fragments from the perfect crystal, only three units are needed to construct any arbitrary tilt boundary. For symmetric boundaries, only two units are required, each having the same Burgers, vector of a<100>. Both units are pentagons, on either the Sr or Ti sublattice, and both contain two columns of the other sublattice, imaging in positions too close for the atoms in each column to be coplanar. Each column was therefore assumed to be half full, with the pair forming a single zig-zag column. For asymmetric boundaries, crystal geometry requires two types of dislocations; the additional unit was found to have a Burgers’ vector of a<110>. Such a unit is a larger source of strain, and is especially important to the transport characteristics of cuprate superconductors. These zig-zag columns avoid the problem of like-ion repulsion; they have also been seen in TiO2 and YBa2Cu3O7-x and may be a general feature of ionic materials.

The electronic band structure of silicon

Physica ◽  
1954 ◽  
Vol 3 (7-12) ◽  
pp. 967-970
Author(s):  
D JENKINS
Keyword(s):  
Band Structure ◽  
Electronic Band Structure ◽  
Electronic Band

Discussion of the band structure effects on thermoemission as deduced from a simple model

1976 ◽  
Vol 37 (2) ◽  
pp. 149-158 ◽  
Author(s):  
A.K. Bhattacharjee ◽  
B. Caroli ◽  
D. Saint-James
Keyword(s):  
Simple Model ◽  
Band Structure
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