منابع مشابه
Phonon density of states of iron up to 153 gigapascals.
We report phonon densities of states (DOS) of iron measured by nuclear resonant inelastic x-ray scattering to 153 gigapascals and calculated from ab initio theory. Qualitatively, they are in agreement, but the theory predicts density at higher energies. From the DOS, we derive elastic and thermodynamic parameters of iron, including shear modulus, compressional and shear velocities, heat capacit...
متن کاملPhonon density of states and heat capacity of La3−xTe4
O. Delaire,1 A. F. May,2 M. A. McGuire,3 W. D. Porter,3 M. S. Lucas,1 M. B. Stone,1 D. L. Abernathy,1 V. A. Ravi,4,5 S. A. Firdosy,4 and G. J. Snyder2 1Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA 2California Institute of Technology, Pasadena, California 91125, USA 3Materials Science and Technology Division, Oak Ridge National Laboratory, O...
متن کاملPhonon density of states of single-wall carbon nanotubes
The vibrational density of states of single-wall carbon nanotubes (SWNT) was obtained from inelastic neutron scattering data from 0 to 225 meV. The spectrum is similar to that of graphite above 40 meV, while intratube features are clearly observed at 22 and 36 meV. An unusual energy dependence below 10 meV is assigned to contributions from intertube modes in the 2D triangular lattice of SWNT bu...
متن کاملPhonon density of states of LaFeAsO(1-x)Fx.
We have studied the phonon density of states (PDOS) in LaFeAsO(1-x)Fx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x approximately 0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference...
متن کاملLocal phonon density of states in an elastic substrate
The local, eigenfunction-weighted acoustic phonon density of states (DOS) tensor is calculated for a model substrate consisting of a semi-infinite isotropic elastic continuum with a stress-free surface. On the surface, the local DOS is proportional to the square of the frequency v, as for the three-dimensional Debye model, but with a constant of proportionality that is considerably enhanced com...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2001
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.87.017005