The Coupling of Collective Cyclotron Excitations and Longitudinal Optic Phonons in Polar Semiconductors

1969 ◽  
pp. 126-135 ◽  
Author(s):  
Sato Iwasa
Keyword(s):  
Longitudinal Optic ◽  
Longitudinal Optic Phonons

Coupling of GaN- and AlN-like longitudinal optic phonons in Ga1−xAlxN solid solutions

1998 ◽  
Vol 72 (21) ◽  
pp. 2674-2676 ◽  
Author(s):  
F. Demangeot ◽  
J. Groenen ◽  
J. Frandon ◽  
M. A. Renucci ◽  
O. Briot ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Longitudinal Optic ◽  
Longitudinal Optic Phonons

Oscillatory Tunnel Conductance Induced by Longitudinal Optic Phonons in InSb-Oxide-Metal Structure

1967 ◽  
Vol 19 (25) ◽  
pp. 1421-1423 ◽  
Author(s):  
Yoshifumi Katayama ◽  
Kiichi F. Komatsubara
Keyword(s):  
Metal Structure ◽  
Longitudinal Optic ◽  
Longitudinal Optic Phonons

Evaluation of the internal field produced by longitudinal optic phonons in ZnSe crystals

1983 ◽  
Vol 61 (7) ◽  
pp. 1017-1020 ◽  
Author(s):  
J. Daunay ◽  
Jac. Daunay ◽  
P. Bugnet
Keyword(s):  
Room Temperature ◽  
Internal Field ◽  
Mean Square ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Longitudinal Optic ◽  
The Mean ◽  
Increasing Temperature ◽  
Franz Keldysh Effect ◽  
Longitudinal Optic Phonons

Measurements of light absorption on ZnSe single crystals, conducted from 80 K to room temperature, show that the forbidden band gap decreases with increasing temperature because of the electron–phonon interaction. It is established for temperatures ranging from 140 to 320 K that longitudinal optic (LO) and acoustic (A) phonons operate simultaneously and exclusively so that [Formula: see text]. The first term, resulting from the Franz–Keldysh effect applied to the mean square field produced by LO phonons, provides the value of this field. It reaches 105 V cm−1 at room temperature.

Line shapes of longitudinal-optic phonons in sodium chloride at 300 and 600 K

1983 ◽  
Vol 28 (2) ◽  
pp. 993-996 ◽  
Author(s):  
E. R. Cowley ◽  
S. Satija ◽  
R. Youngblood
Keyword(s):  
Sodium Chloride ◽  
Line Shapes ◽  
Longitudinal Optic ◽  
Longitudinal Optic Phonons

Two-dimensional magnetopolaron coupling to both homopolar and longitudinal optic phonons in the layer compound InSe

1989 ◽  
Vol 1 (40) ◽  
pp. 7493-7498 ◽  
Author(s):  
D F Howell ◽  
R J Nicholas ◽  
C J G M Langerak ◽  
J Singleton ◽  
T J B M Janssen ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Layer Compound ◽  
Longitudinal Optic ◽  
Longitudinal Optic Phonons

Electron mobility in n-type Hg1−xCdxTe and Hg1−xZnx Te alloys

1992 ◽  
Vol 7 (8) ◽  
pp. 2211-2218 ◽  
Author(s):  
J.D. Patterson ◽  
Wafaa A. Gobba ◽  
S.L. Lehoczky
Keyword(s):  
Boltzmann Equation ◽  
Mercury Cadmium Telluride ◽  
Energy Gap ◽  
Material Parameters ◽  
Energy Gaps ◽  
Comparison With Experiment ◽  
Longitudinal Optic ◽  
Compositional Disorder ◽  
Future Work ◽  
Longitudinal Optic Phonons

We have calculated the mobility of electrons in n-type Mercury Cadmium Telluride (MCT) and compared it to a calculation of the mobility of electrons in n-type Mercury Zinc Telluride (MZT) with nearly the same energy gap and with the same number of donors and acceptors. We also compared the results of the MZT calculation with experiment. We found for equivalent energy gaps that the mobilities in the two compounds (MCT, MZT) were nearly the same. The calculations for both MCT and MZT were based on the best set of material parameters that we could compile from the literature. Using these parameters, the comparison with experiment for MZT yielded good results. Since MZT is harder and structurally more stable with respect to Hg retention than MCT, the possibility of equivalent mobility for MCT and MZT is significant. This calculation is one of the first extensive calculations of the mobility of MZT, and we compared it with another which appeared to be less extensive. Our calculation involves scattering of the electrons by longitudinal optic phonons, acoustic phonons, ionized impurities, holes, and compositional disorder. Since not all of these interactions can be approximated by elastic scattering, the corresponding Boltzmann equation was solved by a variational principle. We also discuss directions for future work.

scholarly journals Strong Coupling of Folded Phonons with Plasmons in 6H-SiC Micro/Nanocrystals

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2296 ◽  
Author(s):  
Yao Huang ◽  
Run Yang ◽  
Shijie Xiong ◽  
Jian Chen ◽  
Xinglong Wu
Keyword(s):  
Silicon Carbide ◽  
Electrical Properties ◽  
Raman Scattering ◽  
Film Thickness ◽  
Strong Coupling ◽  
Energy Gaps ◽  
Longitudinal Optic ◽  
Transverse Optic

Silicon carbide (SiC) has a large number of polytypes of which 3C-, 4H-, 6H-SiC are most common. Since different polytypes have different energy gaps and electrical properties, it is important to identify and characterize various SiC polytypes. Here, Raman scattering is performed on 6H-SiC micro/nanocrystal (MNC) films to investigate all four folded transverse optic (TO) and longitudinal optic (LO) modes. With increasing film thickness, the four folded TO modes exhibit the same frequency downshift, whereas the four folded LO modes show a gradually-reduced downshift. For the same film thickness, all the folded modes show larger frequency downshifts with decreasing MNC size. Based on plasmons on MNCs, these folded modes can be attributed to strong coupling of the folded phonons with plasmons which show different strengths for the different folded modes while changing the film thickness and MNC size. This work provides a useful technique to identify SiC polytypes from Raman scattering.

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