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Simple view of theMg2Si1−xSnxphonon spectrum: Sn resonances and mean field
- Source :
- Physical Review B. 91
- Publication Year :
- 2015
- Publisher :
- American Physical Society (APS), 2015.
-
Abstract
- We have studied the phonon spectrum of ${\text{Mg}}_{2}{\text{Si}}_{1\ensuremath{-}x}{\text{Sn}}_{x}$ alloys using both density-functional theory calculations and neutron measurements. In the low tin concentration limit a resonance is obtained in the lower part of the spectrum. At higher concentrations comparison between theory and experiments shows that a simple averaging of the force constants of the perfect crystals ${\text{Mg}}_{2}\text{Si}$ and ${\text{Mg}}_{2}\text{Sn}$ can explain the main features of the density of states. However we suggest that the tin resonance persists up to large tin concentrations and may therefore be important for transport properties.
- Subjects :
- Physics
SIMPLE (dark matter experiment)
Condensed matter physics
Phonon
Spectrum (functional analysis)
Resonance
chemistry.chemical_element
Condensed Matter Physics
3. Good health
Electronic, Optical and Magnetic Materials
Classical mechanics
chemistry
Mean field theory
Density of states
Neutron
Tin
Subjects
Details
- ISSN :
- 1550235X and 10980121
- Volume :
- 91
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi...........b955c1949a0d1787d9a064c95fc4438f