A self‐consistent multiple‐peak structure of the photoemission spectra of metallic Fe 2 p as a function of film thickness

2020 ◽  
Vol 52 (9) ◽  
pp. 591-599
Author(s):  
Alberto Herrera‐Gomez ◽  
Orlando Cortazar‐Martínez ◽  
Jesus‐Fernando Fabian‐Jocobi ◽  
Abraham Carmona‐Carmona ◽  
Joaquin‐Gerardo Raboño‐Borbolla ◽  
...  
Keyword(s):  
Film Thickness ◽  
Multiple Peak ◽  
Peak Structure ◽  
Self Consistent

scholarly journals Self-Consistent Calculation of Particle-Hole Diagrams on the Matsubara Frequency: Flex Approximation

1997 ◽  
Vol 08 (05) ◽  
pp. 1145-1158
Author(s):  
J. J. Rodríguez-Núñez ◽  
S. Schafroth
Keyword(s):  
Hubbard Model ◽  
Imaginary Part ◽  
Chemical Potential ◽  
Order Approximation ◽  
The Self ◽  
Green Functions ◽  
Matsubara Frequency ◽  
Self Energy ◽  
Peak Structure ◽  
Self Consistent

We implement the numerical method of summing Green function diagrams on the Matsubara frequency axis for the fluctuation exchange (FLEX) approximation. Our method has previously been applied to the attractive Hubbard model for low density. Here we apply our numerical algorithm to the Hubbard model close to half filling (ρ =0.40), and for T/t = 0.03, in order to study the dynamics of one- and two-particle Green functions. For the values of the chosen parameters we see the formation of three branches which we associate with the two-peak structure in the imaginary part of the self-energy. From the imaginary part of the self-energy we conclude that our system is a Fermi liquid (for the temperature investigated here), since Im Σ( k , ω) ≈ w2 around the chemical potential. We have compared our fully self-consistent FLEX solutions with a lower order approximation where the internal Green functions are approximated by free Green functions. These two approches, i.e., the fully self-consistent and the non-self-consistent ones give different results for the parameters considered here. However, they have similar global results for small densities.

Multiple-peak structure in porous Si photoluminescence

2010 ◽  
Vol 107 (12) ◽  
pp. 123520 ◽  
Author(s):  
Yan Kai Xu ◽  
Sadao Adachi
Keyword(s):  
Porous Si ◽  
Multiple Peak ◽  
Peak Structure

High-energy proton drift echoes: Multiple peak structure

1984 ◽  
Vol 89 (A10) ◽  
pp. 9101 ◽  
Author(s):  
R. D. Belian ◽  
D. N. Baker ◽  
E. W. Hones ◽  
P. R. Higbie
Keyword(s):  
High Energy ◽  
High Energy Proton ◽  
Multiple Peak ◽  
Peak Structure ◽  
Energy Proton

scholarly journals SKYRME-RANDOM-PHASE-APPROXIMATION DESCRIPTION OF SPIN-FLIP AND ORBITAL M1 GIANT RESONANCES

2010 ◽  
Vol 19 (04) ◽  
pp. 558-567 ◽  
Author(s):  
V. O. NESTERENKO ◽  
J. KVASIL ◽  
P. VESELY ◽  
W. KLEINIG ◽  
P.-G. REINHARD
Keyword(s):  
Random Phase Approximation ◽  
Random Phase ◽  
Proton Spin ◽  
Qualitative Description ◽  
Phase Approximation ◽  
Isotopic Chain ◽  
Giant Resonances ◽  
Peak Structure ◽  
Spin Flip ◽  
Self Consistent

The self-consistent separable random-phase approximation (SRPA) with Skyrme forces is extended to the case of magnetic excitations and applied to the description of spin-flip and orbital M1 giant resonances in the isotopic chain 142-152 Nd . The Skyrme forces SkT6, SkM*, SLy6 and SkI3 are used. The calculations show an onset of the scissors mode with increasing deformation. A specific three-peak structure of the spin-flip response is found and explained by particular neutron and proton spin-flip transitions. Although the employed forces provide an acceptable qualitative description, the Skyrme functional still needs further improvement to reproduce quantitatively the experiment for spin modes.

Direct observation of a multiple-peak structure in the Raman spectra of 74Ge and 70Ge nanocrystals

2013 ◽  
Vol 113 (4) ◽  
pp. 044312
Author(s):  
Shai Levy ◽  
Issai Shlimak ◽  
David H. Dressler ◽  
Tiecheng Lu
Keyword(s):  
Raman Spectra ◽  
Direct Observation ◽  
Multiple Peak ◽  
Peak Structure

The evolution of the Kuiper belt during the formation of the outer planets

1999 ◽  
Vol 173 ◽  
pp. 37-44
Author(s):  
M.D. Melita ◽  
A. Brunini
Keyword(s):  
Kuiper Belt ◽  
Outer Planets ◽  
Self Consistent ◽  
Planetary Bodies ◽  
Mass Depletion

AbstractA self-consistent study of the formation of planetary bodies beyond the orbit of Saturn and the evolution of Kuiper disks is carried out by means of an N-body code where accretion and gravitational encounters are considered. This investigation is focused on the aggregation of massive bodies in the outer planetary region and on the consequences of such process in the corresponding cometary belt. We study the link between the bombardment of massive bodies and mass depletion and eccentricity excitation.

Surface Films on Zircaloy-2 Samples Cracked in Neutral Aqueous NaCl by Stress Corrosion

1973 ◽  
Vol 31 ◽  
pp. 46-47
Author(s):  
R.A. Ploc
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Film Thickness ◽  
Stress Corrosion ◽  
Zirconium Dioxide ◽  
Surface Film ◽  
Surface Films ◽  
Continuous Layer ◽  
Transmission Electron ◽  
Product Film

Samples of low-nickel Zircaloy-2 (material MLI-788-see(1)), when anodically polarized in neutral 5 wt% NaCl solutions, were found to be susceptible to pitting and stress corrosion cracking. The SEM revealed that pitting of stressed samples was occurring below a 2000Å thick surface film which behaved differently from normal zirconium dioxide in that it did not display interference colours. Since the initial film thickness was approximately 65Å, attempts were made to examine the product film by transmission electron microscopy to deduce composition and how the corrosion environment could penetrate the continuous layer.

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