High pressure studies of high Tc superconductors in A–Cu–O system: The role of apical oxygen

2007 ◽  
Vol 460-462 ◽  
pp. 178-181 ◽  
Author(s):  
C.Q. Jin ◽  
Q.Q. Liu ◽  
H. Yang ◽  
L.X. Yang ◽  
R.C. Yu ◽  
...  
Keyword(s):  
High Pressure ◽  
Apical Oxygen ◽  
High Tc Superconductors ◽  
High Tc ◽  
High Pressure Studies

X-ray emission from high-Tc superconductors: Role of apical oxygen

1991 ◽  
Vol 185-189 ◽  
pp. 711-712 ◽  
Author(s):  
C.F. Hague ◽  
J.-M. Mariot ◽  
V. Barnole ◽  
C. Michel
Keyword(s):  
Apical Oxygen ◽  
High Tc Superconductors ◽  
High Tc ◽  
X Ray

scholarly journals HIGH-PRESSURE STUDIES OF THE Gd1-xCaxBa2Cu3O7-y HIGH-Tc SUPERCONDUCTORS

1994 ◽  
Vol 43 (10) ◽  
pp. 1704
Author(s):  
HAN CUI-YING ◽  
FANG FANG ◽  
XIE SI-SHEN
Keyword(s):  
High Pressure ◽  
High Tc Superconductors ◽  
High Tc ◽  
High Pressure Studies

Low energy excitations in high-Tc superconductors: The crucial role of the apical oxygen ion

1996 ◽  
Vol 46 (S2) ◽  
pp. 935-936
Author(s):  
A. Bussmann-Holder ◽  
L. Genzel ◽  
A. R. Bishop ◽  
A. Simon
Keyword(s):  
Crucial Role ◽  
Low Energy ◽  
Apical Oxygen ◽  
High Tc Superconductors ◽  
High Tc ◽  
Oxygen Ion

High Pressure Studies of Quantum Well Emission and Deep Emission in GaInP(ordered)-GaAs Heterostructures

1997 ◽  
Vol 499 ◽  
Author(s):  
S. H. Kwok ◽  
P. Y. Yu ◽  
K. Uchida ◽  
T. Arai
Keyword(s):  
High Pressure ◽  
Quantum Well ◽  
Emission Band ◽  
Excitation Power ◽  
High Excitation ◽  
High Pressure Studies ◽  
Band Alignments ◽  
High Pressure Study

ABSTRACTWe report on a high pressure study of emission from a series of GaInP(ordered)/GaAs heterostructures. A so-called “deep emission” band at 1.46 eV is observed in all our samples. At high excitation power, quantum well emission emerges in only one structure where thin GaP layers are inserted on both sides of the GaAs well. From the pressure dependent emission in this sample we have determined its band alignments. The role of the GaP layers in suppressing the deep emission is elucidated.

High pressure EXAFS study of high Tc superconductors

1989 ◽  
Vol 158 (1-3) ◽  
pp. 463-464 ◽  
Author(s):  
N. Alberding ◽  
K.R. Bauchspieß ◽  
J.M. Tranquada ◽  
R. Ingalls ◽  
E.D. Crozier
Keyword(s):  
High Pressure ◽  
High Tc Superconductors ◽  
High Tc ◽  
Exafs Study

High-Tc Superconductors Under Very High Pressure

1991 ◽  
pp. 399-417
Author(s):  
Rinke J. Wijngaarden ◽  
J. J. Scholtz ◽  
E. N. van Eenige ◽  
R. Griessen
Keyword(s):  
High Pressure ◽  
High Tc Superconductors ◽  
High Tc ◽  
Very High

THE VAN HOVE SINGULARITY IN HIGH Tc SUPERCONDUCTORS

1995 ◽  
Vol 09 (09) ◽  
pp. 1067-1080 ◽  
Author(s):  
M.L. HORBACH ◽  
H. KAJÜTER
Keyword(s):  
Energy Scale ◽  
Measured Temperature ◽  
Van Hove Singularity ◽  
High Tc Superconductors ◽  
Electronic Density ◽  
High Tc ◽  
Scattering Rate ◽  
Weakly Coupled ◽  
Coherence Lengths

Experimental indications for the role of the van Hove singularity (vHs) in the electronic density of states of high Tc superconductors are discussed. It is argued that (i) like the resistivity, the measured temperature and doping dependences of the normal state electronic specific heat of YBCO are consistent with the existence of a vHs and (ii) the doping dependence of Tc in the underdoped and optimally doped regimes may be accounted for mainly by a vHs. Further, we discuss the suppression of the quasiparticle scattering rate below Tc, and the coherence lengths in the hole-doped materials and NCCO. Assuming that the same mechanism for superconductivity operates in the electron-doped and the hole-doped cuprates, we argue that the bosonic mode that causes the superconductivity is strongly influenced by the doping in the overdoped regime. We further argue that this boson involves an energy scale larger than that of phonons and is only weakly coupled to the charge carriers.

Ultra high pressure experiments on high-Tc superconductors

1993 ◽  
pp. 121-146 ◽  
Author(s):  
Rinke J. Wijngaarden ◽  
E. N. Eenige ◽  
J. J. Scholtz ◽  
D. Tristan Jover ◽  
R. Griessen
Keyword(s):  
High Pressure ◽  
High Tc Superconductors ◽  
High Tc ◽  
Ultra High Pressure
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