Lattice Vibrations of the Cooperites PdO and PtS

1989 ◽  
Vol 44 (3) ◽  
pp. 169-172 ◽  
Author(s):  
G. Kliche
Keyword(s):  
Force Field ◽  
Vibrational Spectra ◽  
Short Range ◽  
Lattice Vibration ◽  
Covalent Bonding ◽  
Lattice Vibrations ◽  
Vibration Frequencies ◽  
Short Range Force ◽  
Range Force ◽  
Good Agreement

The vibrational spectra of the cooperite type compounds PdO and PtS (space group P42/mmc - D4h9, Z = 2) are analyzed. Good agreement between experimental and calculated lattice vibration frequencies is obtained using a force field which includes short-range force constants only. This demonstrates a highly covalent bonding character of the cooperites.

Calculation of the optical phonons in ordered Ba2 MgWO6 perovskite using short-range force field model

2018 ◽  
Vol 49 (11) ◽  
pp. 1822-1829 ◽  
Author(s):  
J.E. Rodrigues ◽  
D.M. Bezerra ◽  
A.C. Hernandes
Keyword(s):  
Force Field ◽  
Short Range ◽  
Field Model ◽  
Optical Phonons ◽  
Short Range Force ◽  
Range Force

Measuring the short-range force field above a single molecule with atomic resolution

2011 ◽  
Vol 99 (5) ◽  
pp. 053106 ◽  
Author(s):  
Fabian Mohn ◽  
Leo Gross ◽  
Gerhard Meyer
Keyword(s):  
Force Field ◽  
Single Molecule ◽  
Short Range ◽  
Atomic Resolution ◽  
Short Range Force ◽  
Range Force

scholarly journals Laboratory search for spin-dependent short-range force from axionlike particles using optically polarizedHe3gas

2013 ◽  
Vol 87 (1) ◽  
Author(s):  
P.-H. Chu ◽  
A. Dennis ◽  
C. B. Fu ◽  
H. Gao ◽  
R. Khatiwada ◽  
...  
Keyword(s):  
Short Range ◽  
Short Range Force ◽  
Range Force

LOCAL DIPOLE FIELD CONTRIBUTIONS TO BOND-STRETCHING SILICON–HYDROGEN VIBRATIONAL MODES ON FLAT AND VICINAL Si(111) SURFACES

1997 ◽  
Vol 04 (05) ◽  
pp. 891-896 ◽  
Author(s):  
H.-Y. YANG ◽  
G. LUCOVSKY
Keyword(s):  
Short Range ◽  
Vicinal Surfaces ◽  
Flat Surfaces ◽  
Coupled Mode ◽  
Dipole Interactions ◽  
Short Range Force ◽  
Bond Stretching ◽  
Hydrogenated Amorphous ◽  
Range Force ◽  
Better Than

Bond-stretching frequencies for bonded-H (and D) on flat and vicinal Si(111) surfaces have been calculated using a model that includes (i) short range valence forces and (ii) dynamic effects due to dipole–dipole interactions. Dipole–dipole interactions have been calculated exactly for flat surfaces, and for vicinal surfaces off-cut in the [Formula: see text] and [Formula: see text] directions terminated respectively by monohydride, Si–H, and dihydride, Si–H 2, bonding at the step edges. Using short range force constants and effective charges obtained from isolated Si–H and Si–H 2 stretching modes in hydrogenated amorphous Si, a-Si:H, as input parameters, the calculated coupled mode frequencies are in excellent agreement with experiment, i.e. using 5 empirical parameters, 16 frequencies in the range of 1500–2150 cm-1 are fit to better than 0.14%, or ±2–3 cm-1.

Sign in / Sign up

Export Citation Format

Share Document