Crystalline lattice effects on tensionless surface dynamics

Crystalline Lattice Eeects on Tensionless Surface Dynamics

A new model is introduced for two-dimensional crystalline interfaces with negligible surface tension. The model is given by a discrete version of the linear molecular beam epitaxy (MBE) equation plus an additional term periodic in the interface height variable. Langevin dynamics simulations and analytical arguments show that the model exhibits a roughening transition to the high temperature pha...

Influence of dipole interaction on lattice dynamics of crystalline ice

The Born effective charges of component atoms and phonon spectra of a tetrahedrally coordinated crystalline ice are calculated from the first principles method based on density functional theory within the generalized gradient approximation with the projected augmented wave method. Phonon dispersion relations in a 3×1×1 supercell were evaluated from Hellmann-Feynman forces with the direct metho...

Dynamics on an Infinite Surface with the Lattice Property

Dynamical systems on an infinite translation surface with the lattice property are studied. The geodesic flow on this surface is found to be recurrent in all but countably many rational directions. Hyperbolic elements of the affine automorphism group are found to be nonrecurrent, and a precise formula regarding their action on cylinders is proven. A deformation of the surface in the space of tr...

Direct measurement of lattice spacing on crystalline surface using scanning tunneling microscope and laser interferometry

More on Supersymmetric Tensionless Rotating

Rotating IIB strings in AdS5 × S become ultra-relativistic, and hence effectively tensionless, in the limit of large angular momentum on S. We have shown previously that such tensionless strings may preserve supersymmetry. Here we extend this result to include a class of supersymmetric tensionless strings with arbitrary SO(6) angular momentum. We close with some general comments on tensionless ...