Parametric excitation of charge density fluctuations in classical and quantum electron-hole plasmas

1979 ◽  
Vol 50 (1) ◽  
pp. 37-63
Author(s):  
G. Ferrante ◽  
S. Nuzzo ◽  
M. Zarcone
Keyword(s):  
Charge Density ◽  
Parametric Excitation ◽  
Density Fluctuations ◽  
Electron Hole ◽  
Quantum Electron

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.

Modulating the atomic and electronic structures through alloying and heterostructure of single-layer MoS2

2014 ◽  
Vol 2 (7) ◽  
pp. 2101-2109 ◽  
Author(s):  
Xiao-Lin Wei ◽  
Hui Zhang ◽  
Gen-Cai Guo ◽  
Xi-Bo Li ◽  
Woon-Ming Lau ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Charge Density ◽  
Electronic Structures ◽  
Single Layer ◽  
Electron Hole ◽  
Hole Recombination ◽  
Spontaneous Separation

Charge density of the VBM (green) and CBM (blue) for armchair MoS2–WS2 heterostructures, indicating the spontaneous separation of photo-generated electrons and holes, which could strongly enhance the photocatalytic activity due to suppression of the electron–hole recombination.

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