An instantaneous normal mode description of relaxation in supercooled liquids

Keyes, T.; Vijayadamodar, G.V.
March 1997
Journal of Chemical Physics;3/15/1997, Vol. 106 Issue 11, p4651
Academic Journal
Details the relaxation in supercooled liquids formulated from instantaneous normal modes (INM). Frequency and temperature dependence of the unstable, imaginary frequency lobe of the INM density of states; Crossover behavior exhibited by the density of states in its temperature dependence; General INM description of strong and fragile liquids.


Related Articles

  • Fickian crossover and length scales from two point functions in supercooled liquids. Stariolo, Daniel A.; Fabricius, Gabriel // Journal of Chemical Physics;8/14/2006, Vol. 125 Issue 6, p064505 

    Particle motion of a Lennard-Jones supercooled liquid near the glass transition is studied by molecular dynamics simulations. We analyze the wave vector dependence of relaxation times in the incoherent self-scattering function and show that at least three different regimes can be identified and...

  • Aging in a free-energy landscape model for glassy relaxation. Diezemann, Gregor // Journal of Chemical Physics;11/22/2005, Vol. 123 Issue 20, p204510 

    The aging properties of a simple free-energy landscape model for the primary relaxation in supercooled liquids are investigated. The intermediate scattering function and the rotational correlation functions are calculated for the generic situation of a quench from a high temperature to below the...

  • Fragile to strong crossover at the Widom line in supercooled aqueous solutions of NaCl. Gallo, P.; Corradini, D.; Rovere, M. // Journal of Chemical Physics;Nov2013, Vol. 139 Issue 20, p204503 

    We study by molecular dynamics simulations the dynamical properties of an aqueous solution of NaCl at a concentration of 0.67 mol/kg upon supercooling. In a previous study of the same ionic solution, we have located the liquid-liquid critical point (LLCP) and determined the Widom line connected...

  • Physics update. B.P.S // Physics Today;Jun98, Vol. 51 Issue 6, p9 

    Reports that two studies of supercooled water have revealed that two forms of liquid water may coexist at the same time. Details on this discovery; Benefits of this discovery.

  • Flow, diffusion and crystallization of supercooled liquids: Revisited. Ngai, K. L.; Magill, J. H.; Plazek, D. J. // Journal of Chemical Physics;1/22/2000, Vol. 112 Issue 4 

    Within the last five years, investigators using NMR and forced Raleigh scattering techniques have found that the Stokes-Einstein (S-E) relation breaks down in supercooled liquids. It has been pointed out that the shear viscosity has a significantly stronger temperature dependence than either the...

  • Supercooled liquids and the glass transition: Temperature as the control variable. Ferrer, Maria Luisa; Lawrence, Christopher // Journal of Chemical Physics;11/8/1998, Vol. 109 Issue 18, p8010 

    Examines the role of temperature for the viscosity and relaxation time of supercooled liquids. Introduction of thermal effects by the free-volume models; Dependence of energy barriers on density; Comparison between triphenyl phosphate and other fragile liquids.

  • Phonon interpretation of the 'boson peak' in supercooled liquids. Grigera, T. S.; Martin-Mayor, V.; Parisi, G.; Verrocchio, P. // Nature;3/20/2003, Vol. 422 Issue 6929, p289 

    Glasses are amorphous solids, in the sense that they display elastic behaviour. In crystalline solids, elasticity is associated with phonons, which are quantized vibrational excitations. Phonon-like excitations also exist in glasses at very high (terahertz; 1012?Hz) frequencies; surprisingly,...

  • Study of the depolarized light scattering spectra of supercooled liquids by a simple... Krakoviack, V.; Alba-Simionesco, C.; Krauzman, M. // Journal of Chemical Physics;9/1/1997, Vol. 107 Issue 9, p3417 

    Studies the depolarized light scattering spectra of supercooled liquids by a simple mode-coupling model. Experimental support and spectral trends; Mode-coupling theory of the glass transition; Model and data processing.

  • Normal mode analysis of the velocity correlation function in supercooled liquids. Madan, B.; Keyes, T.; Seeley, G. // Journal of Chemical Physics;5/15/1991, Vol. 94 Issue 10, p6762 

    Further results are given on the application of harmonic normal mode analysis to liquid state dynamics. A new configuration space-normal mode theory is presented for the velocity correlation function. Here, the hopping rate, ωv, of the phase point among the local minima of the potential in...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics