Anomalous longitudinal acoustic phonon and elastic constant in potassium alum KAl(SO4)2·12H2O single crystal studied by Brillouin spectroscopy

2020 ◽  
Vol 140 ◽  
pp. 109364 ◽  
Author(s):  
Jae-Hyeon Ko ◽  
Soo Han Oh ◽  
Kwang-Sei Lee
Keyword(s):  
Elastic Constant ◽  
Single Crystal ◽  
Acoustic Phonon ◽  
Potassium Alum ◽  
Brillouin Spectroscopy ◽  
Longitudinal Acoustic ◽  
Longitudinal Acoustic Phonon

THE PHONON MECHANISM OF THE COLD FUSION

1996 ◽  
Vol 10 (23) ◽  
pp. 1129-1132 ◽  
Author(s):  
FU-SUI LIU
Keyword(s):  
Acoustic Phonon ◽  
Cold Fusion ◽  
Time Dependent ◽  
Longitudinal Acoustic ◽  
Phonon Mechanism ◽  
Longitudinal Acoustic Phonon

This paper shows that the longitudinal acoustic phonon can induce a time-dependent hopping rate of deuteron in PdD, and leads to the cold fusion.

Magnons and Phonons in Cobalt Ferrite

1974 ◽  
Vol 52 (5) ◽  
pp. 396-398 ◽  
Author(s):  
H. C. Teh ◽  
M. F. Collins ◽  
H. A. Mook
Keyword(s):  
Acoustic Phonon ◽  
Room Temperature ◽  
Cobalt Ferrite ◽  
Zone Boundary ◽  
Phonon Branch ◽  
Longitudinal Acoustic ◽  
Transverse Acoustic ◽  
Low Energies ◽  
Longitudinal Acoustic Phonon ◽  
Infrared Data

Magnons and phonons have been observed in a single crystal of cobalt ferrite, CoFe2O1 at room temperature. Dispersion relations are plotted for the [001] and the [111] directions. The longitudinal acoustic phonon branch has been measured out to the zone boundary in both directions, while the transverse acoustic branch has been completely determined only in the [001] direction. The acoustic magnon branches are well defined at low energies, but they rapidly lose intensity and disappear at around 9 THz. We have not determined uniquely why this happens, but some possibilities are given. Optic branches have been observed at around 11.3 and 14.0 THz. Infrared data indicate that the first branch is probably of phonon character and the second of magnon character.

Time-resolved reflectivity studies of coherent longitudinal acoustic phonon pulses in bulk III-nitride semiconductors

2005 ◽  
Vol 202 (5) ◽  
pp. 790-794 ◽  
Author(s):  
M. Wraback ◽  
H. Shen ◽  
A. V. Sampath ◽  
C. J. Collins ◽  
G. A. Garrett ◽  
...  
Keyword(s):  
Acoustic Phonon ◽  
Nitride Semiconductors ◽  
Time Resolved ◽  
Longitudinal Acoustic ◽  
Longitudinal Acoustic Phonon

Pump-probe studies of travelling coherent longitudinal acoustic phonon oscillations in GaAs

2008 ◽  
Vol 5 (8) ◽  
pp. 2632-2636 ◽  
Author(s):  
Y. Xu ◽  
J. Qi ◽  
J. Miller ◽  
Y.-J. Cho ◽  
X. Liu ◽  
...  
Keyword(s):  
Acoustic Phonon ◽  
Pump Probe ◽  
Longitudinal Acoustic ◽  
Longitudinal Acoustic Phonon
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