Direct determination of the valence‐band offsets at Ga0.47In0.53As/InP and InP/Ga0.47In0.53As heterostructures by ultraviolet photoemission spectroscopy

1992 ◽  
Vol 60 (10) ◽  
pp. 1241-1243 ◽  
Author(s):  
J. P. Landesman ◽  
J. C. Garcia ◽  
J. Massies ◽  
P. Maurel ◽  
G. Jezequel ◽  
...  
Keyword(s):  
Valence Band ◽  
Direct Determination ◽  
Photoemission Spectroscopy ◽  
Band Offsets ◽  
Ultraviolet Photoemission Spectroscopy

A Purely Spectroscopic Technique for Determining Energy Band Offsets in Quantum Wells

1991 ◽  
Vol 240 ◽  
Author(s):  
Emil S. Koteies
Keyword(s):  
Quantum Wells ◽  
Valence Band ◽  
Accurate Determination ◽  
Energy Difference ◽  
Spectroscopic Technique ◽  
Band Offsets ◽  
Band Energy ◽  
Semiconductor Quantum Wells ◽  
Sensitive Function

ABSTRACTWe have developed a novel experimental technique for accurately determining band offsets in semiconductor quantum wells (QW). It is based on the fact that the ground state heavy- hole (HH) band energy is more sensitive to the depth of the valence band well than the light-hole (LH) band energy. Further, it is well known that as a function of the well width, Lz, the energy difference between the LH and HH excitons in a lattice matched, unstrained QW system experiences a maximum. Calculations show that the position, and more importantly, the magnitude of this maximum is a sensitive function of the valence band offset, Qy, which determines the depth of the valence band well. By fitting experimentally measured LH-HH splittings as a function of Lz, an accurate determination of band offsets can be derived. We further reduce the experimental uncertainty by plotting LH-HH as a function of HH energy (which is a function of Lz ) rather than Lz itself, since then all of the relevant parameters can be precisely determined from absorption spectroscopy alone. Using this technique, we have derived the conduction band offsets for several material systems and, where a consensus has developed, have obtained values in good agreement with other determinations.

scholarly journals Determination of the valence band edge of Fe oxide nanoparticles dispersed in aqueous solution through resonant photoelectron spectroscopy from a liquid microjet

2021 ◽  
Author(s):  
Giorgia Olivieri ◽  
Gregor Kladnik ◽  
Dean Cvetko ◽  
Matthew A. Brown
Keyword(s):  
Aqueous Solution ◽  
Electronic Structure ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Band Edge ◽  
Photoemission Spectroscopy ◽  
Oxide Nanoparticles ◽  
Valence Band Edge ◽  
Resonant Photoemission

The electronic structure of hydrated nanoparticles can be unveiled by coupling a liquid microjet with a resonant photoemission spectroscopy.

Valence band ultraviolet photoemission spectroscopy of Dy/W(100)

Vacuum ◽  
2002 ◽  
Vol 67 (3-4) ◽  
pp. 429-433 ◽  
Author(s):  
N Moslemzadeh ◽  
S.D Barrett ◽  
V.R Dhanak ◽  
G Miller
Keyword(s):  
Valence Band ◽  
Photoemission Spectroscopy ◽  
Ultraviolet Photoemission Spectroscopy

BBonding in minerals: the application of PAX (photoelectron and X-ray) spectroscopy to the direct determination of electronic structure

1989 ◽  
Vol 53 (370) ◽  
pp. 153-164 ◽  
Author(s):  
David S. Urch
Keyword(s):  
Electronic Structure ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Direct Determination ◽  
Energy Scale ◽  
X Ray ◽  
Electron Transitions ◽  
Dipole Selection Rule ◽  
The Individual

AbstractX-ray photoelectron spectroscopy can be used to measure the ionization energies of electrons in both valence band and core orbitals. As core vacancies are the initial states for X-ray emission, a knowledge of their energies for all atoms in a mineral enables all the X-ray spectra to be placed on a common energy scale. X-ray spectra are atom specific and are governed by the dipole selection rule. Thus the individual bonding roles of the different atoms are revealed by the fine structure of valence X-ray peaks (i.e. peaks which result from electron transitions between valence band orbitals and core vacancies). The juxtaposition of such spectra enables the composition of the molecular orbitals that make up the chemical bonds of a mineral to be determined.Examples of this approach to the direct determination of electronic structure are given for silica, forsterite, brucite, and pyrite. Multi-electron effects and developments involving anisotropic X-ray emission from single crystals are also discussed.

Determination of the valence band offsets at HfO2 /InN(0001) and InN/In0.3 Ga0.7 N(0001) heterojunctions using X-ray photoelectron spectroscopy

2010 ◽  
Vol 207 (6) ◽  
pp. 1335-1337 ◽  
Author(s):  
Anja Eisenhardt ◽  
Andreas Knübel ◽  
Ralf Schmidt ◽  
Marcel Himmerlich ◽  
Joachim Wagner ◽  
...  
Keyword(s):  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Band Offsets ◽  
X Ray

Ultraviolet-photoemission-spectroscopy study of the interaction of atomic hydrogen with cleaved InP: A valence-band contribution

1991 ◽  
Vol 43 (18) ◽  
pp. 14581-14588 ◽  
Author(s):  
F. Proix ◽  
C. A. Sébenne ◽  
B. El Hafsi ◽  
K. Hricovini ◽  
R. Pinchaux ◽  
...  
Keyword(s):  
Valence Band ◽  
Atomic Hydrogen ◽  
Photoemission Spectroscopy ◽  
Spectroscopy Study ◽  
Ultraviolet Photoemission Spectroscopy

Staggered band alignments in AlGaAs heterojunctions and the determination of valence‐band offsets

1986 ◽  
Vol 48 (8) ◽  
pp. 541-543 ◽  
Author(s):  
P. Dawson ◽  
B. A. Wilson ◽  
C. W. Tu ◽  
R. C. Miller
Keyword(s):  
Valence Band ◽  
Band Offsets ◽  
Band Alignments
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