Cu-spin fluctuations in hole- and electron-doped high-Tc superconducting cuprates relating to stripe pinning

2012 ◽  
Author(s):  
Risdiana ◽  
T. Adachi ◽  
I. Watanabe ◽  
Y. Koike
Keyword(s):  
Spin Fluctuations ◽  
High Tc ◽  
Superconducting Cuprates

scholarly journals High-Tc Superconducting Cuprates, (Ce,Y)sO2s-2Sr2(Cu2.75Mo0.25)O6+δ: Tc-increase with apical Cu-O decrease at constant Cu-O planar distance

2014 ◽  
Vol 507 (1) ◽  
pp. 012031 ◽  
Author(s):  
M Marezio ◽  
O Chmaissem ◽  
C Bougerol ◽  
M Karppinen ◽  
H Yamauchi ◽  
...  
Keyword(s):  
High Tc ◽  
Superconducting Cuprates

scholarly journals Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor

Science ◽  
2019 ◽  
Vol 365 (6456) ◽  
pp. 906-910 ◽  
Author(s):  
R. Arpaia ◽  
S. Caprara ◽  
R. Fumagalli ◽  
G. De Vecchi ◽  
Y. Y. Peng ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Charge Density ◽  
Charge Density Waves ◽  
Density Fluctuations ◽  
Large Area ◽  
High Tc ◽  
Superconducting Cuprates ◽  
X Ray Scattering ◽  
Underdoped Region ◽  
Dynamical Charge

Charge density modulations have been observed in all families of high–critical temperature (Tc) superconducting cuprates. Although they are consistently found in the underdoped region of the phase diagram and at relatively low temperatures, it is still unclear to what extent they influence the unusual properties of these systems. Using resonant x-ray scattering, we carefully determined the temperature dependence of charge density modulations in YBa2Cu3O7–δ and Nd1+xBa2–xCu3O7–δ for several doping levels. We isolated short-range dynamical charge density fluctuations in addition to the previously known quasi-critical charge density waves. They persist up to well above the pseudogap temperature T*, are characterized by energies of a few milli–electron volts, and pervade a large area of the phase diagram.

scholarly journals MECHANISM OF HIGH-Tc SUPERCONDUCTIVITY BASED MAINLY ON TUNNELING MEASUREMENTS IN CUPRATES

2005 ◽  
Vol 19 (16) ◽  
pp. 743-770 ◽  
Author(s):  
A. MOURACHKINE
Keyword(s):  
Tunneling Spectroscopy ◽  
Phase Coherence ◽  
Spin Fluctuations ◽  
Cooper Pairs ◽  
High Tc ◽  
High Tc Superconductivity ◽  
One Dimensional ◽  
Topological Excitations ◽  
Discrete Breathers

The main purpose of this brief review is to present a sketch of the mechanism of high-Tc superconductivity based mainly on tunneling measurements in cuprates. In the review, we shall mostly discuss tunneling spectroscopy in Bi 2 Sr 2 CaCu 2 O 8. Analysis of the data shows that the Cooper pairs in cuprates are topological excitations (e.g. quasi-one-dimensional bisolitons, discrete breathers etc.), and the phase coherence among the Cooper pairs appears due to spin fluctuations.

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