Charge‐density fluctuations and spatial modulation of heavy‐ and light‐hole‐like character in GaAs‐AlGaAs(001) superlattices

1986 ◽  
Vol 48 (18) ◽  
pp. 1214-1216 ◽  
Author(s):  
M. A. Gell ◽  
M. Jaros
Keyword(s):  
Charge Density ◽  
Density Fluctuations ◽  
Light Hole ◽  
Spatial Modulation

Charge-density fluctuations probed by vibronic modes of K0.3MoO3

2012 ◽  
Vol 407 (11) ◽  
pp. 1823-1826 ◽  
Author(s):  
Rebecca Beyer ◽  
Neven Barišić ◽  
Martin Dressel
Keyword(s):  
Charge Density ◽  
Density Fluctuations

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.

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