Strong electronic correlation in the in-plane electronic properties of the high Tc superconductors

1996 ◽  
Vol 105 (3-4) ◽  
pp. 627-632
Author(s):  
Bang-Gui Liu
Keyword(s):  
Electronic Properties ◽  
Electronic Correlation ◽  
High Tc Superconductors ◽  
High Tc ◽  
Strong Electronic Correlation

Modifying electronic properties of interfaces in high-Tc superconductors by doping

1999 ◽  
Vol 326-327 ◽  
pp. 7-11 ◽  
Author(s):  
H. Hilgenkamp ◽  
C.W. Schneider ◽  
R.R. Schulz ◽  
B. Goetz ◽  
A. Schmehl ◽  
...  
Keyword(s):  
Electronic Properties ◽  
High Tc Superconductors ◽  
High Tc

Electronic Properties of some Ternary and Quaternary Oxides of the VIII B and I B Transition Elements: Application to High Tc Superconductivity

1989 ◽  
Vol 156 ◽  
Author(s):  
M. Pouchard ◽  
J-C. Grenier ◽  
J-P. Doumerc ◽  
G. Demazeau ◽  
J-P. Chaminade ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Structural Parameters ◽  
Mixed Valence ◽  
Oxidation States ◽  
Transition Elements ◽  
High Tc Superconductors ◽  
High Tc ◽  
Electronic Configurations ◽  
Spin Electronic ◽  
Mixed Valence Compounds

ABSTRACTIn the scope of the Goodenough model, a brief review of the electronic properties of some 3d transition elements (M = Fe, Co, Ni and Cu ) is given; the main relevant electronic and structural parameters are emphasized. Then a special attention is focussed on N/(N−1) and N/(N−2) electron mixed valence compounds.Finally some particular features of copper are discussed and their relevance to high Tc superconductors is pointed out:-the srong covalency of Cu-O bondings involving a possible delocalization of the hole between trivalent copper and oxygen,-the existence of low and high spin electronic configurations for CuIII,-the disproportionation of Cu2+ and its role in the formation of hole pairs,Cu-O distances very close for the three successive oxidation states of copper favouring the disproportionation process.

43Ca NMR Study of Bismuth-Based High-Tc Superconductors

1994 ◽  
Vol 49 (1-2) ◽  
pp. 373-378 ◽  
Author(s):  
A. Trokiner ◽  
L. Le Noc ◽  
A. Yakubovskii ◽  
K.N. Mykhalyov ◽  
S.V. Verkhovskii
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Electronic Properties ◽  
High Tc Superconductors ◽  
High Tc ◽  
Structural Assignment ◽  
Bismuth Compounds ◽  
Nmr Study

Abstract As a first step of a study of the electronic properties of CuO2 planes by probing calcium nuclei in the bismuth-based high-Tc materials we report here the structural assignment of Ca NMR lines measured in 43Ca-enriched samples of n = 2 ((Bi,Pb)2Sr2CaCu2O8+x) and n = 3 ((Bi,Pb)2Sr2-Ca2Cu3O10+x) bismuth compounds. Powdered samples were investigated as well as oriented pow­ ders, achieved by uniaxial alignment of the grains in a 7T magnetic field. For the main calcium site (Ca between two CuO2 planes), we could determine the quadrupolar as well as the shift tensors. The results indicate that, in the same way as yttrium nuclei in YBaCuO, calcium nuclei are sensitive to the magnetic susceptibility of the metallic CuO2 planes.

Electronic properties of high-Tc superconductors below and above the Fermi energy

1990 ◽  
Vol 246 (1-3) ◽  
pp. A169
Author(s):  
N. Ernst ◽  
W.A. Schmidt ◽  
G. Bozdech ◽  
M. Naschitzki ◽  
A.J. Melmed
Keyword(s):  
Electronic Properties ◽  
Fermi Energy ◽  
High Tc Superconductors ◽  
High Tc

Preparation and electronic properties of reactive magnetron sputter-deposited Bi-Ca-Sr-Cu-O thin film high-Tc superconductors

1988 ◽  
Vol 91 (3) ◽  
pp. 363-367 ◽  
Author(s):  
Han Zheng-he ◽  
K. Tsushima ◽  
N. Karpe ◽  
H. Medelius ◽  
Klas Jacobson ◽  
...  
Keyword(s):  
Thin Film ◽  
Electronic Properties ◽  
Reactive Magnetron ◽  
High Tc Superconductors ◽  
High Tc ◽  
Magnetron Sputter ◽  
Sputter Deposited

DYNAMICS OF TWIN BOUNDARIES AND HIGH Tc SUPERCONDUCTORS

1987 ◽  
Vol 01 (03n04) ◽  
pp. 931-940
Author(s):  
B. Horovitz ◽  
G.R. Barsch ◽  
J.A. Krumhansl
Keyword(s):  
Specific Heat ◽  
Temperature Dependence ◽  
Electronic Properties ◽  
Twin Boundary ◽  
Linear Temperature Dependence ◽  
High Tc Superconductors ◽  
Linear Temperature ◽  
High Tc ◽  
Vertex Corrections ◽  
Anisotropic Dispersion

The formation of coherent arrays of twins in a tetragonal to orthorhombic transition and its effects on electronic properties are studied. The twin boundary oscillations (“dyadons”) have an anisotropic dispersion with frequencies typically ≲1010 sec −1 for wavevectors perpendicular to the boundaries. This results in a ~T2 contribution to the specific heat for T≳ 1° K and a linear temperature dependence of the resistivity. The unusual anisotropy yields vertex corrections which diverge at high temperatures and can enhance T c.

Electronic properties of high-Tc superconductors below and above the Fermi energy

1991 ◽  
Vol 246 (1-3) ◽  
pp. 183-188 ◽  
Author(s):  
N. Ernst ◽  
W.A. Schmidt ◽  
G. Bozdech ◽  
M. Naschitzki ◽  
A.J. Melmed
Keyword(s):  
Electronic Properties ◽  
Fermi Energy ◽  
High Tc Superconductors ◽  
High Tc
Sign in / Sign up

Export Citation Format

Share Document