Photoemission Study on Chemical Bonding Features and Electronic Defect States of Thermally-Grown SiO2/4H-SiC Structure

2015 ◽  
Vol 69 (10) ◽  
pp. 179-186 ◽  
Author(s):  
H. Watanabe ◽  
A. Ohta ◽  
K. Makihara ◽  
S. Miyazaki
Keyword(s):  
Chemical Bonding ◽  
Defect States ◽  
Electronic Defect ◽  
Photoemission Study ◽  
Thermally Grown

scholarly journals Role of Chemistry and Crystal Structure on the Electronic Defect States in Cs-Based Halide Perovskites

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1032
Author(s):  
Anirban Naskar ◽  
Rabi Khanal ◽  
Samrat Choudhury
Keyword(s):  
Crystal Structure ◽  
Density Functional ◽  
Covalent Bond ◽  
Density Functional Theory Calculations ◽  
Antisite Defect ◽  
Defect States ◽  
Functional Theory ◽  
Electronic Defect ◽  
Constituent Elements

The electronic structure of a series perovskites ABX3 (A = Cs; B = Ca, Sr, and Ba; X = F, Cl, Br, and I) in the presence and absence of antisite defect XB were systematically investigated based on density-functional-theory calculations. Both cubic and orthorhombic perovskites were considered. It was observed that for certain perovskite compositions and crystal structure, presence of antisite point defect leads to the formation of electronic defect state(s) within the band gap. We showed that both the type of electronic defect states and their individual energy level location within the bandgap can be predicted based on easily available intrinsic properties of the constituent elements, such as the bond-dissociation energy of the B–X and X–X bond, the X–X covalent bond length, and the atomic size of halide (X) as well as structural characteristic such as B–X–B bond angle. Overall, this work provides a science-based generic principle to design the electronic states within the band structure in Cs-based perovskites in presence of point defects such as antisite defect.

scholarly journals Intrinsic electronic defect states of anatase using density functional theory

2020 ◽  
Vol 184 ◽  
pp. 109925
Author(s):  
Abhishek Raghav ◽  
Adie Tri Hanindriyo ◽  
Keishu Utimula ◽  
Mohaddeseh Abbasnejad ◽  
Ryo Maezono ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Defect States ◽  
Functional Theory ◽  
Electronic Defect

The influence of thermal annealing on the electronic defect states in nanocrystalline CVD diamond films

2008 ◽  
Vol 205 (9) ◽  
pp. 2158-2162 ◽  
Author(s):  
Z. Remes ◽  
A. Kromka ◽  
J. Potmesil ◽  
M. Vanecek
Keyword(s):  
Thermal Annealing ◽  
Diamond Films ◽  
Cvd Diamond ◽  
Defect States ◽  
Electronic Defect

When A Mild Mannered 1-5 eV Photon Meets A Big 10 eV Bandgap: Studies Of Laser Desorption From Modified Surfaces of Ionic Single Crystals

2000 ◽  
Vol 617 ◽  
Author(s):  
J. Thomas Dickinson ◽  
Christos Bandis ◽  
Stephen C. Langford
Keyword(s):  
Laser Desorption ◽  
Wide Bandgap ◽  
Laser Damage ◽  
Probe Laser ◽  
Ionic Crystals ◽  
Defect States ◽  
Modified Surfaces ◽  
Electronic Defect ◽  
Electron Emissions ◽  
Ion Emission

AbstractExposing wide-bandgap ionic materials to UV and IR photons can produce ion emissions with kinetic energies of several eV, well in excess of the photon energy. Electron emissions are also observed. This implies that these materials possess occupied electronic defect states within the band gap. We have investigated the consequences of a variety of defect-generating stimuli (electron irradiation, laser irradiation, mechanical treatments, and heating) on electron and ion emission from inorganic ionic crystals. These stimuli generate defects that strongly interact with the probe laser on a wide variety of ionic crystals, and dramatically decrease the probe laser intensities required for ion and neutral emissions, laser damage, and plume formation.

Probing electronic defect states in manganite/SrTiO3 heterostructures by surface photovoltage spectroscopy

2011 ◽  
Vol 176 (5) ◽  
pp. 446-452 ◽  
Author(s):  
E. Beyreuther ◽  
A. Thiessen ◽  
J. Becherer ◽  
S. Grafström ◽  
K. Dörr ◽  
...  
Keyword(s):  
Surface Photovoltage ◽  
Defect States ◽  
Surface Photovoltage Spectroscopy ◽  
Electronic Defect
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