Normal modes in the vicinity of the brillouin zone center of tightly bound units in Bi12GeO20 and Bi12SiO20

1985 ◽  
Vol 46 (7) ◽  
pp. 803-807 ◽  
Author(s):  
R. Steudner ◽  
J. Żmija
Keyword(s):  
Brillouin Zone ◽  
Normal Modes ◽  
Brillouin Zone Center

Infrared dielectric functions and Brillouin zone center phonons of α−Ga2O3 compared to α - Al2O3

2022 ◽  
Vol 6 (1) ◽  
Author(s):  
Megan Stokey ◽  
Rafał Korlacki ◽  
Matthew Hilfiker ◽  
Sean Knight ◽  
Steffen Richter ◽  
...  
Keyword(s):  
Brillouin Zone ◽  
Α Al2o3 ◽  
Brillouin Zone Center

scholarly journals Brillouin zone center phonon modes in ZnGa2O4

2020 ◽  
Vol 117 (5) ◽  
pp. 052104 ◽  
Author(s):  
Megan Stokey ◽  
Rafał Korlacki ◽  
Sean Knight ◽  
Matthew Hilfiker ◽  
Zbigniew Galazka ◽  
...  
Keyword(s):  
Brillouin Zone ◽  
Phonon Modes ◽  
Brillouin Zone Center

Observation of a Thermodynamic Distinction Between Brillouin Zone Center and Boundary Exciton States in MnF2

1968 ◽  
Vol 21 (15) ◽  
pp. 1067-1070 ◽  
Author(s):  
R. E. Dietz ◽  
A. E. Meixner ◽  
H. J. Guggenheim ◽  
A. Misetich
Keyword(s):  
Brillouin Zone ◽  
Brillouin Zone Center

Lattice Dynamical Model for Graphite-Bromine Intercalation Compounds

1982 ◽  
Vol 20 ◽  
Author(s):  
R. Al-Jishi ◽  
G. Dresselhaus
Keyword(s):  
Brillouin Zone ◽  
High Frequency ◽  
Low Frequency ◽  
Unit Cell ◽  
Intercalation Compounds ◽  
Dynamical Model ◽  
Von Karman ◽  
Zone Folding ◽  
Von Kármán ◽  
Brillouin Zone Center

ABSTRACTA Born-von Kármán lattice dynamical model for the graphite Br2 intercalation compounds is presented. The low frequency bromine branches are calculated using a commensurate (√3 × √13)R(30°, 13.9°) unit cell with two Br2 molecules/unit cell. In-plane zone folding is used to calculate the high frequency graphitic modes at the Brillouin zone center.

Anharmonic Specific Heat of Crystalline NaCl

1971 ◽  
Vol 49 (1) ◽  
pp. 20-25 ◽  
Author(s):  
T. H. Kwon ◽  
J. H. Henkel
Keyword(s):  
Specific Heat ◽  
Brillouin Zone ◽  
Normal Modes ◽  
Thermodynamic Quantity ◽  
Numerical Results ◽  
Pseudo Potential

The anharmonic contributions to the specific heat of crystalline NaCl have been evaluated in a localized model characterized by a pseudo potential and direct Brillouin zone sums. The numerical results indicate that the anharmonic contributions to a thermodynamic quantity such as specific heat converge rapidly with respect to the chosen number of normal modes N. The approximately converged results are compared with experiments and with calculations by others.

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