Microscopic description of the low-temperature anomalies in silica and lithium silicate via computer simulations

Details Microscopic description of the low-temperature anomalies in silica and lithium silicate via computer simulations Microscopic description of the low-temperature anomalies in silica and lithium silicate via computer simulations

2006-09-27

arxiv.org/abs/cond-mat/0609693v1

J. Phys. Chem. B 110, 19044 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

Information about the nature of the low-temperature anomalies and in particular the properties of the tunneling systems in silica and lithium silica glasses are revealed via computer simulations. The potential energy landscape of these systems is systematically explored for adjacent pairs of local minima which may act as double-well potentials (DWP) at low temperatures. Three different types of DWP are distinguished, related to perfectly coordinated silica, intrinsic silica defects, and extrinsic defects. Their properties like the spatial extension and the dipole moment are characterized in detail. Furthermore, the absolute number of tunneling systems, i.e. symmetric DWP, is estimated. The results are compared with dielectric echo, specific heat and acoustic experiments on Suprasil I and Suprasil W. A semi-quantitative agreement for all relevant features is obtained.

Affiliated with

Also associated with

No associations

Rating

Microscopic description of the low-temperature anomalies in silica and lithium silicate via computer simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Microscopic description of the low-temperature anomalies in silica and lithium silicate via computer simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microscopic description of the low-temperature anomalies in silica and lithium silicate via computer simulations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-166958