scholarly journals The bandgap energy of the dilute bismuth GaBi x Sb1−x alloy depending on temperature

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chuan-Zhen Zhao ◽  
Xue-Lian Qi
Keyword(s):  
Temperature Dependence ◽  
Valence Band ◽  
Bandgap Energy ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Spin Orbit Splitting ◽  
Increasing Trend ◽  
Reduced Temperature

Abstract The bandgap energy of the dilute bismuth GaBi x Sb1−x alloy vs. temperature is investigated in this study. Its reduced temperature-sensitiveness is because of the localized character of the valence band states (VBS). In order to describe the reduced temperature-sensitiveness of the bandgap energy, a new term including localized energy is added to Varshni's equation. It is found that the localized energy exhibits an increasing trend as the bismuth fraction increases, which indicates that the localized character of the VBS becomes strong with the increasing bismuth fraction. It is also found that the influence of the bismuth fraction on the temperature dependence of the bandgap energy of GaBi x Sb1−x is smaller than that of GaBi x As1−x . In addition, the element indium is undoubtedly a good candidate to lessen the bismuth fraction to realize that the spin-orbit-splitting (SOP) energy surpasses the bandgap energy in GaBi x Sb1−x .

Spin-Orbit Splitting of the Valence Band of Wurtzite Type Crystals

1967 ◽  
Vol 19 (2) ◽  
pp. 823-832 ◽  
Author(s):  
E. Gutsche ◽  
E. Jahne
Keyword(s):  
Valence Band ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Spin Orbit Splitting

Spin–orbit splitting in graphene, silicene and germanene: Dependence on buckling

2018 ◽  
Vol 32 (05) ◽  
pp. 1850055 ◽  
Author(s):  
Ranber Singh
Keyword(s):  
Valence Band ◽  
Valence Band Maximum ◽  
Honeycomb Structure ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Band Maximum ◽  
Honeycomb Structures ◽  
Spin Orbit Splitting

The spin–orbit splitting (E[Formula: see text]) of valence band maximum at the [Formula: see text] point is significantly smaller in 2D planner honeycomb structures of graphene, silicene, germanene and BN than that in the corresponding 3D bulk counterparts. For 2D planner honeycomb structure of SiC, it is almost same as that for 3D bulk cubic SiC. The bandgap which opens at the K and K[Formula: see text] points due to spin–orbit coupling (SOC) is very small in flat honeycomb structures of graphene and silicene, while in germanene it is about 2 meV. The buckling in these structures of graphene, silicene and germanene increases the bandgap opened at the K and K[Formula: see text] points due to SOC quadratically, while the E[Formula: see text] of valence band maximum at the [Formula: see text] point decreases quadratically with an increase in the magnitude of buckling.

scholarly journals The effect of spin-orbit splitting on the valence band density of states of lead

1975 ◽  
Vol 17 (11) ◽  
pp. 1415-1420 ◽  
Author(s):  
F.R. McFeely ◽  
L. Ley ◽  
S.P. Kowalczyk ◽  
D.A. Shirley
Keyword(s):  
Valence Band ◽  
Density Of States ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Spin Orbit Splitting

Notizen: Excitons in the Energy Loss Spectrum of KBr

1968 ◽  
Vol 23 (6) ◽  
pp. 948-949
Author(s):  
P. Keil
Keyword(s):  
Energy Loss ◽  
Valence Band ◽  
Electron Energy ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Spin Orbit Splitting ◽  
Electron Energy Loss

Electron energy loss measurements on polycrystalline KBrfilms are reported. Excitonic structure is found to be associated not only with the top valence band but also with deeper bands (K+3p-level). The spin-orbit splitting of this state is resolved.

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