Momentum density and Compton profile of the inhomogeneous interacting electronic system. I. Formalism

1974 ◽  
Vol 9 (12) ◽  
pp. 5122-5127 ◽  
Author(s):  
L. Lam ◽  
P. Platzman
Keyword(s):  
Electronic System ◽  
Momentum Density ◽  
Compton Profile

Electron Momentum Density In Europium Using A 137Cs Compton Spectrometer

2005 ◽  
Vol 60 (7) ◽  
pp. 512-516
Author(s):  
Babu Lal Ahuja ◽  
Harsh Malhotra ◽  
Sonal Mathur
Keyword(s):  
Experimental Data ◽  
Band Structure ◽  
Gamma Rays ◽  
Free Electron ◽  
Cohesive Energy ◽  
Momentum Density ◽  
Compton Profile ◽  
Electron Momentum ◽  
Electron Models ◽  
Derivatives Of

The isotropic Compton profile of europium, the most reactive lanthanide, has been measured at a resolution of 0.40 a.u. using 661.65 keV gamma-rays. In the absence of a band structure-based Compton profile, the experimental data are compared with renormalised-free-atom (RFA) and free electron models. It is seen that the RFA model with e−-e− correlation agrees better with the experiment than the free electron models. The first derivatives of the Compton profiles show the hybridization effects of s-, p-, d-, f-electrons. From our RFA data we have also computed the cohesive energy of europium. PACS: 13.60.F, 71.15.Nc, 78.70. -g, 78.70.Ck

Magnetic Compton Scattering Study of Ni2Mn1.4Sn0.6 Shape Memory Alloy

2013 ◽  
Vol 665 ◽  
pp. 189-193 ◽  
Author(s):  
Alpa Dashora ◽  
H.S. Mund ◽  
J. Sahariya ◽  
K.R. Priolkar ◽  
N. Lobo ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Compton Scattering ◽  
Magnetic Moments ◽  
Momentum Density ◽  
Compton Profile ◽  
Spin Moment ◽  
Scattering Study ◽  
Stoichiometric Alloy ◽  
Spin Momentum

Spin momentum density in Ni2Mn1.4Sn0.6 shape memory alloy has been measured using magnetic Compton scattering technique. The experiment has been performed using 182 keV circularly polarized synchrotron radiation at temperature 10 K at SPring-8, Japan. Experimental magnetic Compton profile has been decomposed to determine the site specific magnetic moments, where the magnetic moment at Mn site was found to be dominating. It is seen that the total spin moment in present non-stoichiometric alloy is smaller than that of stoichiometric Ni2MnSn.

Compton Profile Study and Electron Momentum Density Reconstruction in Hexagonal Mg

2013 ◽  
Vol 82 (7) ◽  
pp. 074702 ◽  
Author(s):  
Marek Brancewicz ◽  
Maciej Pylak ◽  
Andrzej Andrejczuk ◽  
Eugeniusz Żukowski ◽  
Ludwik Dobrzyński ◽  
...  
Keyword(s):  
Momentum Density ◽  
Compton Profile ◽  
Electron Momentum ◽  
Electron Momentum Density ◽  
Profile Study

Electron momentum density and Compton profile in disordered alloys

2001 ◽  
Vol 62 (12) ◽  
pp. 2191-2197 ◽  
Author(s):  
A. Bansil ◽  
B. Barbiellini ◽  
S. Kaprzyk ◽  
P.E. Mijnarends
Keyword(s):  
Momentum Density ◽  
Compton Profile ◽  
Electron Momentum ◽  
Electron Momentum Density ◽  
Disordered Alloys

Gamma-Ray Compton Spectroscopy for Determination of Electron Momentum Distributions in Iron

2013 ◽  
Vol 815 ◽  
pp. 8-12
Author(s):  
Samir Ahmed Hamouda
Keyword(s):  
Gamma Ray ◽  
Polycrystalline Sample ◽  
High Energy ◽  
Momentum Density ◽  
Profile Measurement ◽  
Compton Profile ◽  
Γ Radiation ◽  
Theoretical Predictions ◽  
Spectrometer Calibration

Compton profile measurement of iron polycrystalline sample has been performed with 662 keV γ-radiation from a caesium-137 source. The spectrometer calibration and data corrections for the high energy experiment are discussed. The data are compared with the augmented-plane-wave (APW) and linear combination of atomic orbitals (LCAO) band theoretical Compton profiles of iron. Both theoretical predictions show the band theories overestimate the momentum density at low momenta and underestimate it at intermediate momenta.

Momentum density and Compton profile ofTiCl4

1976 ◽  
Vol 13 (3) ◽  
pp. 1083-1090 ◽  
Author(s):  
A. Seth ◽  
D. E. Ellis
Keyword(s):  
Momentum Density ◽  
Compton Profile

scholarly journals On the possibility of using X-ray Compton scattering to study magnetoelectrical properties of crystals

2016 ◽  
Vol 72 (2) ◽  
pp. 197-205 ◽  
Author(s):  
S. P. Collins ◽  
D. Laundy ◽  
T. Connolley ◽  
G. van der Laan ◽  
F. Fabrizi ◽  
...  
Keyword(s):  
Compton Scattering ◽  
First Principles ◽  
Momentum Density ◽  
Orbit Interaction ◽  
Compton Profile ◽  
X Ray ◽  
X Ray Scattering ◽  
Crystallographic Symmetry ◽  
Order Of Magnitude ◽  
Antisymmetric Component

This paper discusses the possibility of using Compton scattering – an inelastic X-ray scattering process that yields a projection of the electron momentum density – to probe magnetoelectrical properties. It is shown that an antisymmetric component of the momentum density is a unique fingerprint of such time- and parity-odd physics. It is argued that polar ferromagnets are ideal candidates to demonstrate this phenomenon and the first experimental results are shown, on a single-domain crystal of GaFeO3. The measured antisymmetric Compton profile is very small (≃ 10−5of the symmetric part) and of the same order of magnitude as the statistical errors. Relativistic first-principles simulations of the antisymmetric Compton profile are presented and it is shown that, while the effect is indeed predicted by theory, and scales with the size of the valence spin–orbit interaction, its magnitude is significantly overestimated. The paper outlines some important constraints on the properties of the antisymmetric Compton profile arising from the underlying crystallographic symmetry of the sample.

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