upward

Glass

A I Chumakov, G Monaco, A Fontana etal, Role of Disorder in the Thermodynamics and Atomic Dynamics of Glasses, PRL 112, 025502 (2014)

J Reinisch, A Heuer, Microscopic description of the low-temperature anomalies in silica and lithium silicate via computer simulations, JPCB 110, 19044 (2006)

J Reinisch, A Heuer, What is moving in silica at 1 K? A computer study of the low-temperature anomalies, PRL 95, 155502 (2005)

K O Trachenko, M T Dove, M J Harris, V Heine, Dynamics of silica glass: two-level tunnelling states and low-energy floppy modes, JPC 12, 8041 (2000) – mpeg

L Guttman, S M Rahman, Modeling a "tunneling" state in amorphous silicon dioxide, PRB 33, 1506 (1986)

Robertson J L, Moss S C, Calculation of the scattering properties of a computer-relaxed 614 atom bell and dean SiO2 network, JNCS 106, 330 (1988)