Relaxation times and low-temperature specific heat of the quadrupolar glass

Computer simulations of a simplified model for molecular orientational order in certain solids provide results consistent with glass-like linear specific heat c_v at low temperatures. The temperature dependence of the quadrupolar relaxation time is found to be well described by the expression 1/τ～exp [-A/(T?T₀)], with T₀ well below the onset of the linear c_v regime. The relationship to experiments on solid hydrogen is discussed.