Citation
A. Ghosh et al., Low-energy excitations in crystalline perovskite oxides: Evidence from noise experiments, PHYS REV B, 58(22), 1998, pp. R14665-R14668
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829
→ ACNP
Volume
58
Issue
22
Year of publication
1998
Pages
R14665 - R14668
Database
ISI
SICI code
0163-1829(199812)58:22<R14665:LEICPO>2.0.ZU;2-R
Abstract
In this paper we report measurements of 1/f noise in a crystalline metallic
oxide with perovskite structure down to 4.2 K. The results show existence
of localized excitations with average activation energy approximate to 70-8
0 meV which produce a peak in the noise at T approximate to 35-40 K. Ln add
ition, it shows clear evidence of tunnelling-type two-level systems las in
glasses) which show up in noise measurements below 30 K.