Fermi surface excitations in X-ray photoemission line shapes from metals

1978 ◽  
pp. 197-236 ◽  
Author(s):  
G. K. Wertheim ◽  
P. H. Citrin
Keyword(s):  
Fermi Surface ◽  
X Ray ◽  
Line Shapes

scholarly journals Measuring the supermassive black hole parameters with space missions

2006 ◽  
Vol 2 (S238) ◽  
pp. 475-476
Author(s):  
Alexander F. Zakharov
Keyword(s):  
Black Hole ◽  
Spectral Line ◽  
Accretion Disks ◽  
Seyfert Galaxies ◽  
Emission Lines ◽  
X Ray ◽  
Line Shapes ◽  
Supermassive Black Hole ◽  
Broad Emission ◽  
Different Types

AbstractRecent X-ray observations of microquasars and Seyfert galaxies reveal broad emission lines in their spectra, which can arise in the innermost parts of accretion disks. Recently Müller & Camenzind (2004) classified different types of spectral line shapes and described their origin. Zakharov (2006b) clarified their conclusions about an origin of doubled peaked and double horned line shapes in the framework of a radiating annulus model and discussed s possibility to evaluate black hole parameters analyzing spectral line shapes.

Potentialities of an Innovative Technique Like 129Xe NMR and of Saxs for the Characterization of Microporous Sol-Gel Derived SiO2

1996 ◽  
Vol 431 ◽  
Author(s):  
L. C. de Menorval ◽  
A. Julbe ◽  
H. Jobic ◽  
J. A. Dalmon ◽  
C. Guizard
Keyword(s):  
Chemical Shifts ◽  
High Surface ◽  
Sol Gel ◽  
Narrow Pore Size Distribution ◽  
X Ray ◽  
Porous Texture ◽  
129Xe Nmr ◽  
Line Shapes ◽  
X Ray Scattering

AbstractAddition of surfactants in TEOS derived sols leads to micro- or mesoporous materials whose porous texture can be varied by changing the surfactant quantity and/or chain length. This series of materials, with a relatively narrow pore size distribution, is well adapted to study the potentialities of an innovative characterization technique like 129Xe Nuclear Magnetic Resonance in comparison with Small Angle X-ray Scattering and N2 adsorption. SAXS revealed a high surface rugosity of the materials and a good correlation with pore hydraulic radius distributions measured by N2 adsorption. Using 129Xe NMR, we have studied the Xe chemical shifts (δXe,) as a function of pXe, and have pointed out several original results showing the importance, for microporous materials, of the NMR line shapes and of the slope of the lines δXe.=f(pXe).

SUPERSTRIPES BY ANOMALOUS X-RAY DIFFRACTION AND ANGLE RESOLVED PHOTOEMISSION IN BI2212

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3649-3655 ◽  
Author(s):  
N. L. SAINI ◽  
A. BIANCONI
Keyword(s):  
Fermi Surface ◽  
Energy Distribution ◽  
Critical Parameter ◽  
Nearest Neighbor ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lattice Coupling

We show an evidence for the superconducting stripes (superstripes) in the Bi2212 system by joint x-ray diffraction and angle resolved photoemission. The kink observed at k y =0.4π in the energy distribution curves is shown to be related to a modulation of the Cu displacement out of the oxygen plane with a wavevector Q ~(0.4π, 0.4π) that modulates the next-nearest neighbor hopping integral t ′. The resulting Fermi surface reveals broken segments around the M points due to the modulation of the t ′, associated with modulation of the electron-lattice coupling λ(ε) that depends on the micro strain ε of the CuO 2 plane. The present findings further enlightens the fact that the micro-strain, controlling the electron-lattice coupling λ(ε) is a critical parameter for the superstripes.

scholarly journals Curve fitting complex X-ray photoelectron spectra of graphite-supported copper nanoparticles using informed line shapes

2020 ◽  
Vol 505 ◽  
pp. 143841 ◽  
Author(s):  
Vincent Fernandez ◽  
Daniyal Kiani ◽  
Neal Fairley ◽  
François-Xavier Felpin ◽  
Jonas Baltrusaitis
Keyword(s):  
Copper Nanoparticles ◽  
Curve Fitting ◽  
Photoelectron Spectra ◽  
X Ray ◽  
Line Shapes

scholarly journals Measurement of synchrotron x‐ray energies and line shapes using diffraction markers

1982 ◽  
Vol 53 (5) ◽  
pp. 575-581 ◽  
Author(s):  
J. V. Acrivos ◽  
K. Hathaway ◽  
J. Reynolds ◽  
J. Code ◽  
S. Parkin ◽  
...  
Keyword(s):  
X Ray ◽  
Line Shapes

Imaging of the Fermi Surface of1T-Ta0.9Hf0.1S2by X-Ray Diffuse Scattering

1975 ◽  
Vol 34 (22) ◽  
pp. 1389-1392 ◽  
Author(s):  
Y. Yamada ◽  
J. C. Tsang ◽  
G. V. Subba-Rao
Keyword(s):  
Fermi Surface ◽  
Diffuse Scattering ◽  
X Ray

Tipping effects in Azbel-Kaner cyclotron resonance

1967 ◽  
Vol 297 (1449) ◽  
pp. 205-229 ◽  
Keyword(s):  
Magnetic Field ◽  
Fermi Surface ◽  
Cyclotron Resonance ◽  
Skin Depth ◽  
Electron Model ◽  
Line Shapes ◽  
Parallel Polarization ◽  
Free Electron Model ◽  
Set Up ◽  
The Magnetic Field

Calculations of Azbel-Kaner line shapes when the magnetic field is tipped out of the surface have been carried out in a number of cases for both the free electron model and an arbitrary Fermi surface with mass spread. For small angles of tip the results substantiate the Doppler shift theory advanced by Koch, Stradling & Kip and provide a consistent explanation of the observed peak shifts or splitting in all cases. Arguments are presented that at larger tip angles the overall absorption will decrease with increasing field, and the original resonance may become inverted, owing to the removal of non-stationary electrons from the skin depth. At large tip angles (5° or so) inverted and doubled resonances observed with parallel polarization are shown to arise from ‘field splashes’ set up by drifting electrons from the limiting points, regardless of the nature of the Fermi surface. Apparently normal resonances observed at very large tip angles are shown to arise from so-called ‘cylinder sections’ where d A /dk 2 H = 0 and v D = 0, A and v D being the area of the orbit in k space and the drift velocity respectively.

Spectral line shapes of UM2- and AsK-edge resonant x-ray scattering in the two antiferromagnetic phases of UAs

2007 ◽  
Vol 75 (18) ◽  
Author(s):  
P. S. Normile ◽  
S. B. Wilkins ◽  
B. Detlefs ◽  
D. Mannix ◽  
E. Blackburn ◽  
...  
Keyword(s):  
Spectral Line ◽  
X Ray ◽  
Line Shapes ◽  
X Ray Scattering ◽  
Ray Scattering
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