1D Electronic Excitations in Metallic and Semiconducting Nanotubes

2019 ◽  
pp. 211-244
Author(s):  
Chiun-Yan Lin ◽  
Jhao-Ying Wu ◽  
Chih-Wei Chiu ◽  
Ming-Fa Lin
Keyword(s):  
Electronic Excitations ◽  
Semiconducting Nanotubes

Use of LaB6 for a High Quality, Small Energy Spread Beam in an Electron Velocity Spectrometer

1976 ◽  
Vol 34 ◽  
pp. 534-535 ◽  
Author(s):  
P. E. Batson ◽  
C. H. Chen ◽  
J. Silcox
Keyword(s):  
High Temperature ◽  
Energy Resolution ◽  
Electron Velocity ◽  
Electronic Excitations ◽  
Small Energy ◽  
Small Intensity ◽  
Good Energy ◽  
Spectrometer System ◽  
Electron Energy Loss ◽  
Very High

Electron energy loss experiments combined with microscopy have proven to be a valuable tool for the exploration of the structure of electronic excitations in materials. These types of excitations, however, are difficult to measure because of their small intensity. In a usual situation, the filament of the microscope is run at a very high temperature in order to present as much intensity as possible at the specimen. This results in a degradation of the ultimate energy resolution of the instrument due to thermal broadening of the electron beam.We report here observations and measurements on a new LaB filament in a microscope-velocity spectrometer system. We have found that, in general, we may retain a good energy resolution with intensities comparable to or greater than those available with the very high temperature tungsten filament. We have also explored the energy distribution of this filament.

Defect formation in solids by decay of electronic excitations

1985 ◽  
Vol 147 (11) ◽  
pp. 523 ◽  
Author(s):  
M.I. Klinger ◽  
Ch.B. Lushchik ◽  
T.V. Mashovets ◽  
G.A. Kholodar' ◽  
M.K. Sheinkman ◽  
...  
Keyword(s):  
Defect Formation ◽  
Electronic Excitations

Bandgap engineering in SrTiO3 thin films by electronic excitations: A synchrotron-based spectroscopic study

2021 ◽  
Vol 195 ◽  
pp. 113725
Author(s):  
Vishnu Kumar ◽  
Anuradha Bhogra ◽  
Manju Bala ◽  
Hung-Wei Kuo ◽  
Chi-Liang Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Spectroscopic Study ◽  
Electronic Excitations ◽  
Bandgap Engineering

scholarly journals Low-temperature investigation of electronic excitations in wide-gap materials doped with RE3+ or Cr3+ ions

2011 ◽  
Vol 111 (3) ◽  
pp. 434-440 ◽  
Author(s):  
A. Lushchik ◽  
Ch. Lushchik ◽  
I. Kudryavtseva ◽  
A. Maaroos ◽  
F. Savikhin ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electronic Excitations ◽  
Wide Gap

scholarly journals Multilevel CC2 and CCSD in Reduced Orbital Spaces: Electronic Excitations in Large Molecular Systems

2021 ◽  
Vol 17 (2) ◽  
pp. 714-726
Author(s):  
Sarai Dery Folkestad ◽  
Eirik F. Kjønstad ◽  
Linda Goletto ◽  
Henrik Koch
Keyword(s):  
Electronic Excitations ◽  
Molecular Systems

Metastable optical absorption of relaxed electronic excitations in BeO-Zn crystals

1999 ◽  
Vol 41 (4) ◽  
pp. 539-543 ◽  
Author(s):  
S. V. Gorbunov ◽  
K. V. Bautin ◽  
A. V. Kruzhalov ◽  
V. Yu. Yakovlev
Keyword(s):  
Optical Absorption ◽  
Electronic Excitations

scholarly journals Theoretical Electronic and Rovibrational Studies for Anions of Interest to the DIBs

2013 ◽  
Vol 9 (S297) ◽  
pp. 344-348 ◽  
Author(s):  
R. C. Fortenberry
Keyword(s):  
Excited State ◽  
Excited States ◽  
State Of The Art ◽  
Spectroscopic Constants ◽  
Coupled Cluster ◽  
Electronic Excitations ◽  
Electronically Excited States ◽  
Coupled Cluster Theory ◽  
Electronically Excited ◽  
Enolate Anion

AbstractThe dipole-bound excited state of the methylene nitrile anion (CH2CN−) has been suggested as a candidate carrier for a diffuse interstellar band (DIB) at 803.8 nm. Its corresponding radical has been detected in the interstellar medium (ISM), making the existence for the anion possible. This work applies state-of-the-art ab initio methods such as coupled cluster theory to reproduce accurately the electronic excitations for CH2CN− and the similar methylene enolate anion, CH2CHO−. This same approach has been employed to indicate that 19 other anions may possess electronically excited states, five of which are valence in nature. Concurrently, in order to assist in the detection of these anions in the ISM, work has also been directed towards predicting vibrational frequencies and spectroscopic constants for these anions through the use of quartic force fields (QFFs). Theoretical rovibrational work on anions has thus far included studies of CH2CN−, C3H−, and is currently ongoing for similar systems.

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