  We performed all-atom molecular dynamics simulations for bulk cyclohexane and
analysed the short- and medium-range structures in supercooled and glassy
states by using the Voronoi tessellation technique. From the analyses of both
the potential energy of the system and the radial distribution function of
molecules, cyclohexane was found to be vitrified as the temperature decreased.
Furthermore, the icosahedral-like structures are dominant at all temperatures
and grow in a supercooled liquid, whereas the face-centred cubic structures do
not grow when the temperature decreases. It was also ascertained that the
icosahedral-like structure is more dominant than the full-icosahedral one. The
network of the distorted icosahedron spreads throughout the system at low
temperatures. Our simulation demonstrates the stability of the icosahedral
structure even in a non-spherical molecule such as cyclohexane.
