It has been shown that the maintenance condition for a crystalline beam requires that there be no resonance between the crystal's phonon frequencies, and the frequency associated with a beam moving through a lattice of Nsp periods. This resonance can be avoided provided that the phonon frequencies all are below half the lattice frequency. Here, we study in detail the phonon modes of several crystalline beams. The analytic results obtained in the smooth approximation are compared with numerical evaluations employing Fourier transform of the molecular dynamics (MD) modes. The stability of various crystalline structures is examined through systematic MD simulations based on several different lattice designs. The maintenance condition, when com...
This article reviews the current status of lattice-dynamical calculations in crystals, using density...
We present some applications of a first-principles approach to the study of the vibrational properti...
The lattice dynamics in magnetic materials, such as Fe depends on the degree of disorder of the atom...
It has been shown that the maintenance condition for a crystalline beam requires that there be no re...
It has been shown that the maintenance condition for a crystalline beam requires that there be no re...
The calculation of phonon dispersion for crystalline solids with r atoms in a unit cell requires sol...
Results of model calculations of the shift of phonon frequencies and of phonon widths with temperatu...
The lack of a unique, classical microscopic reference state impedes the study of elasticity in non-i...
Delocalized nonlinear vibrational modes (DNVMs) supported in crystal lattices are exact solutions to...
This program has been imported from the CPC Program Library held at Queen's University Belfast (1969...
The long-wavelength behavior of vibrational modes plays a central role in carrier transport, phonon-...
The long-wavelength behavior of vibrational modes plays a central role in carrier transport, phonon-...
Elementary excitations associated with atomic motion in non-crystalline solids and liquids are studi...
This article reviews the current status of lattice-dynamical calculations in crystals, using density...
This article reviews the current status of lattice-dynamical calculations in crystals, using density...
This article reviews the current status of lattice-dynamical calculations in crystals, using density...
We present some applications of a first-principles approach to the study of the vibrational properti...
The lattice dynamics in magnetic materials, such as Fe depends on the degree of disorder of the atom...
It has been shown that the maintenance condition for a crystalline beam requires that there be no re...
It has been shown that the maintenance condition for a crystalline beam requires that there be no re...
The calculation of phonon dispersion for crystalline solids with r atoms in a unit cell requires sol...
Results of model calculations of the shift of phonon frequencies and of phonon widths with temperatu...
The lack of a unique, classical microscopic reference state impedes the study of elasticity in non-i...
Delocalized nonlinear vibrational modes (DNVMs) supported in crystal lattices are exact solutions to...
This program has been imported from the CPC Program Library held at Queen's University Belfast (1969...
The long-wavelength behavior of vibrational modes plays a central role in carrier transport, phonon-...
The long-wavelength behavior of vibrational modes plays a central role in carrier transport, phonon-...
Elementary excitations associated with atomic motion in non-crystalline solids and liquids are studi...
This article reviews the current status of lattice-dynamical calculations in crystals, using density...
This article reviews the current status of lattice-dynamical calculations in crystals, using density...
This article reviews the current status of lattice-dynamical calculations in crystals, using density...
We present some applications of a first-principles approach to the study of the vibrational properti...
The lattice dynamics in magnetic materials, such as Fe depends on the degree of disorder of the atom...