Figure 1

Diffracted intensity from the three solid phases of ethanol. The dotted line represents monoclinic crystal, the dashed line the rotationally disordered bcc crystal and the symbols the topological glass. The maximum of the static structure factor for the topological glass is located at $16\mathrm{n}{\mathrm{m}}^{-1}$, whereas the main Bragg peak is found at $16\mathrm{n}{\mathrm{m}}^{-1}$ and $18\mathrm{n}{\mathrm{m}}^{-1}$ for the rotationally disordered and monoclinic crystals, respectively.Reuse & Permissions

Figure 2

Spectra from IXS experiments at two different momentum transfers $Q=3\mathrm{n}{\mathrm{m}}^{-1}$ (a) and $Q=7\mathrm{n}{\mathrm{m}}^{-1}$ (b) for the monoclinic crystal, the rotationally disordered crystal and the topological glass. The symbols represent the experimental data, the full line the fit of the spectra, the dashed line the convoluted inelastic contribution and the dotted line the experimental resolution.Reuse & Permissions

Figure 3

Results from the quantitative analysis of the IXS spectra of ethanol in the monclinic crystal (circles), rotationally disordered bcc crystal (squares) and glass (triangles) phases. Momentum transfer dependence of the position, $\Omega (Q)$, width, $\Gamma (Q)$ and total inelastic intensity are shown in the figures (a)-(c). The dashed line in panel (a) shows the linear dispersion corresponding to the low frequency sound velocity for the glass, ${\mathrm{v}}_L=2850\mathrm{m}/\mathrm{s}$ [20]. The average high frequency sound velocity for the rotationally disordered bcc crystal is the same as for the glass, whereas it is 14% higher in the monoclinic crystal. The dashed line in panel (b) indicates a $Q^2$ behavior of the width at low momentum transfers. The vertical dotted line in the panels (a)-(c) schematically marks the position of an average Brillouin zone.Reuse & Permissions