scholarly journals Ab-initio study of electronic and magneto-optical properties of InAs:Mn

2018 ◽  
Vol 185 ◽  
pp. 06008 ◽  
Author(s):  
Elena Gan’shina ◽  
Erkin Kulatov ◽  
Leonard Golik ◽  
Zoya Kun’kova ◽  
Yurii Uspenskii ◽  
...  
Keyword(s):  
Optical Properties ◽  
Ground State ◽  
Kerr Effect ◽  
Energy Difference ◽  
Dielectric Tensor ◽  
Ab Initio Study ◽  
State Distribution ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra ◽  
Good Agreement

Energy difference between the ferromagnetic and antiferromagnetic collinear orderings has been calculated for the uniform and dimer Mn-pair geometries in order to find the ground state distribution of the Mn atoms in InAs host. We find the preference of the dimer ferromagnetic configuration of Mn dopants and an importance of optimizing the atomic site positions. The frequency-dependent optical and magneto-optical properties, namely the dielectric tensor (on-and off-diagonal components), the electron energy loss spectra, and the transversal Kerr effect (TKE), are calculated. Calculated TKE resonance in In1-xMnxAs (x=0.0625) is found to be in good agreement with corresponding experimental magneto-optical spectra. The origin of the large TKE is discussed.

Ab Initio Study of Electronic and Magneto-Optical Properties of InSb:Mn and InAs:Mn

2012 ◽  
Vol 190 ◽  
pp. 113-116
Author(s):  
E.T. Kulatov ◽  
A. Titov ◽  
Y.A. Uspenskii
Keyword(s):  
Optical Properties ◽  
Ground State ◽  
Kerr Effect ◽  
Energy Difference ◽  
State Distribution ◽  
Kerr Rotation ◽  
Polar Kerr Effect ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra ◽  
Good Agreement

Energy difference between the ferromagnetic and antiferromagnetic collinear orderings has been calculated for the uniform and dimer Mn-pair geometries in order to find the ground state distribution of the Mn atoms in InSb (As) hosts. We find the preference of the dimer ferromagnetic configuration of Mn dopants and an importance of optimizing the atomic site positions. The frequency-dependent optical and magneto-optical properties, namely the reflectivity, the electron energy loss spectra, on-and off-diagonal conductivity tensor and the polar Kerr effect, are calculated for comparison with available experimental data. Our calculated MO resonance in In1-xMnxSb (x=1.56%) are found to be in good agreement with corresponding experimental MO spectra. The origin of the large Kerr rotation is discussed.

Magneto-Optical Kerr Effect in Multiferroic Nanostructures

2006 ◽  
Vol 966 ◽  
Author(s):  
Matthew T. Corbo ◽  
Florian Straub ◽  
Haimei Zheng ◽  
Maria de la Paz Cruz ◽  
Yuri Suzuki
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Kerr Effect ◽  
Optical Signal ◽  
Optical Kerr Effect ◽  
Kerr Rotation ◽  
Film Composition ◽  
Magnetization Measurements ◽  
Magneto Optical Kerr Effect ◽  
Good Agreement

ABSTRACTWe report the study of the magneto-optical properties of composite multiferroic thin films composed of CoFe2O4 nanopillars embedded in a BiFeO3 matrix. The magneto-optical Kerr rotation and Kerr ellipticity in these films have been measured and are in good agreement with magnetization measurements. The Kerr signal has been studied as a function of film composition and nanopillar diameter confirming that the magneto-optical signal is due solely to the CoFe2O4 nanopillars.

Investigations on electronic structure of YMnO3 by electron energy loss spectra and first-principle calculations

2019 ◽  
Vol 34 (4) ◽  
pp. 339-344
Author(s):  
S. Wang ◽  
J. Cai ◽  
H. D. Xu ◽  
H. L. Tao ◽  
Y. Cui ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Energy Loss ◽  
Experimental Spectrum ◽  
X Ray Diffraction ◽  
Edge Structure ◽  
Transmission Electron ◽  
The Individual ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra ◽  
Good Agreement

Crystal structure and electronic structure of YMnO3 were investigated by X-ray diffraction and transmission electron microscopy related techniques. According to the density of states (DOS), the individual interband transitions to energy loss peaks in the low energy loss spectrum were assigned. The hybridization of O 2p with Mn 3d and Y 4d analyzed by the partial DOS was critical to the ferroelectric nature of YMnO3. From the simulation of the energy loss near-edge structure, the fine structure of O K-edge was in good agreement with the experimental spectrum. The valence state of Mn (+3) in YMnO3 was determined by a comparison between experiment and calculations.

scholarly journals Excitons in scintillator materials: Optical properties and electron-energy loss spectra of NaI, LaBr3, BaI2, and SrI2

2016 ◽  
Vol 32 (1) ◽  
pp. 56-63 ◽  
Author(s):  
André Schleife ◽  
Xiao Zhang ◽  
Qi Li ◽  
Paul Erhart ◽  
Daniel Åberg
Keyword(s):  
Optical Properties ◽  
Energy Loss ◽  
Electron Energy ◽  
Image Position ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

Abstract

scholarly journals Optical properties of nickel derived from reflection electron energy loss spectra

2014 ◽  
Vol 488 (13) ◽  
pp. 132007
Author(s):  
R J Bereczky ◽  
J Tóth ◽  
B Da ◽  
S F Mao ◽  
Z J Ding ◽  
...  
Keyword(s):  
Optical Properties ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

Investigation of Electron Momentum Density in Carbon Nanotubes Using Transmission Electron Microscopy

2019 ◽  
Vol 25 (05) ◽  
pp. 1155-1159 ◽  
Author(s):  
Zhenbao Feng ◽  
Hefu Li ◽  
Zongliang Wang ◽  
Xiaoyan Zhang ◽  
Hengshuai Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ground State ◽  
Momentum Density ◽  
Single Wall Carbon Nanotubes ◽  
Large Momentum ◽  
Electron Momentum ◽  
Transmission Electron ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra ◽  
State Charge

AbstractValence Compton profiles (CPs) of multiwall (MWCNTs) and single-wall carbon nanotubes (SWCNTs) were obtained by recording electron energy-loss spectra at large momentum transfer in the transmission electron microscope, a technique known as electron Compton scattering from solids (ECOSS). The experimental MWCNT/SWCNT results were compared with that of graphite. Differences between the valence CPs of MWCNTs and SWCNTs were observed, and the SWCNT CPs indicate a greater delocalization of the ground-state charge density compared to graphite. The results clearly demonstrate the feasibility and potential of the ECOSS technique as a complementary tool for studying the electronic structure of materials with nanoscale spatial resolution.

STRUCTURAL, ELECTRONIC AND OPTICAL PROPERTIES OF THE TETRAGONAL PHASE OFCaSiO3PEROVSKITE UNDER PRESSURE: FIRST-PRINCIPLES CALCULATIONS

2011 ◽  
Vol 25 (01) ◽  
pp. 41-52 ◽  
Author(s):  
ZI-JIANG LIU ◽  
CAI-RONG ZHANG ◽  
XIAO-WEI SUN ◽  
LU WANG ◽  
TING SONG ◽  
...  
Keyword(s):  
Optical Properties ◽  
Pressure Dependence ◽  
First Principles ◽  
Local Density ◽  
Electronic And Optical Properties ◽  
Plane Wave Method ◽  
Direct Band ◽  
Electron Energy Loss ◽  
Calculated Equilibrium ◽  
Good Agreement

First principles studies of structural, elastic, electronic and optical properties of tetragonal CaSiO3perovskite under pressure are reported using the pseudopotential plane wave method within the local density approximation (LDA). The calculated equilibrium lattice is in good agreement with the available experimental data. The elastic constants and their pressure dependence are calculated using the static finite strain technique. A linear pressure dependence of the elastic stiffnesses is found. Band structures show that tetragonal CaSiO3perovskite is a direct band gap material. In order to understand the optical properties of tetragonal CaSiO3perovskite, the dielectric function, absorption coefficient, optical reflectivity, refractive index, extinction coefficient, and electron energy loss are calculated for radiation up to 40 eV. This is the first quantitative theoretical prediction of the elastic, electronic and optical properties of tetragonal CaSiO3perovskite, and it still awaits experimental confirmation.

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