Rolf Schilling

Dynamics of the rotational degrees of freedom in a supercooled liquid of diatomic molecules

Using molecular-dynamics computer simulations, we investigate the dynamics of the rotational degrees of freedom in a supercooled system composed of rigid, diatomic molecules. The interaction between the molecules is given by the sum of interaction-site potentials of the Lennard-Jones type. In agreement with mode-coupling theory (MCT), we find that the relaxation times of the orientational time correlation functions

Glass Transition in Confined Geometry

{C}_{1}^{(s)}(t),

Universal mechanism of spin relaxation in solids

{C}_{2}^{(s)}(t),

Effects of nonlinear sweep in the Landau-Zener-Stueckelberg effect

and

Mode-coupling theory of the glass transition for confined fluids

{C}_{1}(t)

TEST OF MODE COUPLING THEORY FOR A SUPERCOOLED LIQUID OF DIATOMIC MOLECULES. I. TRANSLATIONAL DEGREES OF FREEDOM

show at low temperatures a power law with the same critical temperature

Glass transition of hard spheres in high dimensions.

{T}_{c},

Effect of mixing and spatial dimension on the glass transition

which is also identical to the critical temperature for the translational degrees of freedom. In contrast to MCT, we find, however, that for these correlators the time-temperature superposition principle does not hold well and also the critical exponent \ensuremath{\gamma} depends on the correlator. For

Delocalization-localization transition due to anharmonicity.

{C}_{l}^{(s)}