Electron coherence length and mobility in highly mismatched III-N-V alloys

2008 ◽  
Vol 93 (25) ◽  
pp. 252106 ◽  
Author(s):  
A. Patanè ◽  
G. Allison ◽  
L. Eaves ◽  
N. V. Kozlova ◽  
Q. D. Zhuang ◽  
...  
Keyword(s):  
Coherence Length ◽  
Electron Coherence

scholarly journals Low Temperature Raman Study of the Electron Coherence Length near Graphene Edges

Nano Letters ◽  
2011 ◽  
Vol 11 (3) ◽  
pp. 1177-1181 ◽  
Author(s):  
Ryan Beams ◽  
Luiz Gustavo Cançado ◽  
Lukas Novotny
Keyword(s):  
Low Temperature ◽  
Coherence Length ◽  
Raman Study ◽  
Electron Coherence

Practical Picture Processing

1974 ◽  
Vol 32 ◽  
pp. 338-339
Author(s):  
T. A. Welton
Keyword(s):  
Radiation Damage ◽  
Coherence Length ◽  
Spatial Information ◽  
State Of The Art ◽  
Coherent Radiation ◽  
The State ◽  
Energy Spread ◽  
Electron Micrograph ◽  
Picture Processing ◽  
Molecular Skeleton

Various authors have emphasized the spatial information resident in an electron micrograph taken with adequately coherent radiation. In view of the completion of at least one such instrument, this opportunity is taken to summarize the state of the art of processing such micrographs. We use the usual symbols for the aberration coefficients, and supplement these with £ and 6 for the transverse coherence length and the fractional energy spread respectively. He also assume a weak, biologically interesting sample, with principal interest lying in the molecular skeleton remaining after obvious hydrogen loss and other radiation damage has occurred.

Continuous control of coherence length in separately pumped (AlGa)As lasers

1986 ◽  
Vol 49 (18) ◽  
pp. 1129-1131 ◽  
Author(s):  
Saburo Yamamoto ◽  
Toshiki Hijikata
Keyword(s):  
Coherence Length ◽  
Continuous Control

Spectral Properties of Spatially and Spectrally Partially Coherent Pulsed Beams in Fused-Silica Glass Medium

2010 ◽  
Vol 663-665 ◽  
pp. 108-112
Author(s):  
Chao Liang Ding ◽  
Min Teng ◽  
Zhi Guo Zhao ◽  
Liu Zhan Pan
Keyword(s):  
Spatial Correlation ◽  
Correlation Length ◽  
Silica Glass ◽  
Coherence Length ◽  
Spectral Properties ◽  
Spectral Shift ◽  
Fused Silica ◽  
Partially Coherent ◽  
Spatial Correlation Length ◽  
Fused Silica Glass

Using the coherence theory of non-stationary fields and the method of Fourier transform, the spectral properties of spatially and spectrally partially coherent Gaussian Schell-model pulsed (GSMP) beams in fused-silica glass medium are studied and analyzed numerically. It is shown that the spectral shift takes place, which depends on the position of the field point, spatial correlation length, temporal coherence length and dispersive property of medium, as GSMP beams propagate in fused-silica glass medium. The on-axis spectrum is blue-shifted, and the relative spectral shift increases with increasing propagation distance, and decreases as the spatial correlation length and temporal coherence length increases, and then approaches an asymptotic value. The dispersive property of medium plays an important role in the spectral properties of spatially and spectrally partially coherent beams.

scholarly journals Superconducting coherence length of hole-doped cuprates obtained from electron–boson spectral density function

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jungseek Hwang
Keyword(s):  
Spectral Density ◽  
Coherence Length ◽  
Cooper Pair ◽  
Average Frequency ◽  
Spin Fluctuations ◽  
Fermi Velocity ◽  
Cooper Pairs ◽  
Spectroscopic Techniques ◽  
Microscopic Mechanism ◽  
Superconducting Coherence Length

AbstractElectron–boson spectral density functions (EBSDFs) can be obtained from measured spectra using various spectroscopic techniques, including optical spectroscopy. EBSDFs, known as glue functions, are suggested to have a magnetic origin. Here, we investigated EBSDFs obtained from the measured optical spectra of hole-doped cuprates with wide doping levels, from underdoped to overdoped cuprates. The average frequency of an EBSDF provides the timescale for the spin fluctuations to form Cooper pairs. This timescale is directly associated with retarded interactions between electrons. Using this timescale and Fermi velocity, a reasonable superconducting coherence length, which reflects the size of the Cooper pair, can be extracted. The obtained coherence lengths were consistent with those measured via other experimental techniques. Therefore, the formation of Cooper pairs in cuprates can be explained by spin fluctuations, the timescales of which appear in EBSDFs. Consequently, EBSDFs provide crucial information on the timescale of the microscopic mechanism of Cooper pair formation.

The importance of coherence length in laser phototherapy of gingival inflammation—a pilot study

2007 ◽  
Vol 22 (4) ◽  
pp. 245-251 ◽  
Author(s):  
T. Qadri ◽  
P. Bohdanecka ◽  
J. Tunér ◽  
L. Miranda ◽  
M. Altamash ◽  
...  
Keyword(s):  
Pilot Study ◽  
Coherence Length ◽  
Gingival Inflammation ◽  
Laser Phototherapy

Neutron Scattering from Small Lead Particles

1974 ◽  
Vol 52 (8) ◽  
pp. 748-752 ◽  
Author(s):  
V. Novotny ◽  
T. M. Holden ◽  
G. Dolling
Keyword(s):  
Neutron Diffraction ◽  
Neutron Scattering ◽  
Coherence Length ◽  
Crystalline State ◽  
Lattice Parameter ◽  
Small Particles ◽  
Average Amplitude ◽  
Vycor Glass ◽  
Diffraction Peaks

Neutron diffraction experiments on small particles of lead in the pores of Vycor glass are described. The small particles have a coherence length of (107 ± 20) Å; there is only a slight increase in the lattice parameter as compared with bulk lead, but an analysis of the intensity of the diffraction peaks reveals that there is an increase in the average amplitude of vibration of 28%. At least 80% of the lead in the glass is present in the crystalline state and contributes to the coherent diffraction.

scholarly journals On the Fluctuation Induced Excess Conductivity in Stainless Steel Sheathed MgB2 Tapes

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Suchitra Rajput ◽  
Sujeet Chaudhary
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Stainless Steel ◽  
Coherence Length ◽  
Three Dimensional ◽  
Excess Conductivity ◽  
Scaling Functions ◽  
Critical Fluctuations ◽  
Scaling Models

We report on the analyses of fluctuation induced excess conductivity in the - behavior in the in situ prepared MgB2 tapes. The scaling functions for critical fluctuations are employed to investigate the excess conductivity of these tapes around transition. Two scaling models for excess conductivity in the absence of magnetic field, namely, first, Aslamazov and Larkin model, second, Lawrence and Doniach model, have been employed for the study. Fitting the experimental - data with these models indicates the three-dimensional nature of conduction of the carriers as opposed to the 2D character exhibited by the HTSCs. The estimated amplitude of coherence length from the fitted model is ~21 Å.

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