| Issue |
Europhys. Lett.
Volume 53, Number 1, January 2001
|
|
|---|---|---|
| Page(s) | 40 - 45 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00121-4 | |
| Published online | 01 December 2003 | |
Far-infrared properties of two-level systems in amorphous ice
Laboratory of Atomic and Solid State Physics and the Center for Radiophysics
and Space
Research, Cornell University - Ithaca, NY 14853-2501, USA
Received:
11
September
2000
Accepted:
27
October
2000
Isotopic substitution and defect doping have been used to alter the optical
properties of two-level systems (TLS) in the two amorphous phases of a-
ice. A large TLS optical density of states is found for a- and a-HOD in
the high-density amorphous phase while a thirty times smaller value occurs
for both in the low-density amorphous one. Our quantitative spectroscopic
and thermal study bring out a number of new features, among them that LiCl
doping of low-density amorphous ice increases its TLS optical density of
states, its glass transition temperature and its fragility.
PACS: 63.50.+x – Vibrational states in disordered systems / 78.30.Ly – Disordered solids / 78.90.+t – Other topics in optical properties, condensed matter spectroscopy and other interactions of particles and radiation with condensed matter
© EDP Sciences, 2001
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