Macroscopic quantum coherence in charge density wave whisker NbSe3 under strain

Citation
P. Zheng et al., Macroscopic quantum coherence in charge density wave whisker NbSe3 under strain, J PHYS-COND, 12(26), 2000, pp. 5745-5750
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
0953-8984 → ACNP
Volume
12
Issue
26
Year of publication
2000
Pages
5745 - 5750
Database
ISI
SICI code
0953-8984(20000703)12:26<5745:MQCICD>2.0.ZU;2-I
Abstract
The magnetoresistance oscillation of the charge density wave (CDW) material NbSe3 whisker has been studied under strain at different temperatures (4.2 K, 30 K, 40 K). With a constant measuring current, the magnetoresistance ( MR) curves oscillate at 30 K while they are smooth at 4.2 K and become a se ries of zigzag curves at 40 K. These oscillation periods are Delta H, rathe r than Delta(1/H). It is found that either increasing the temperature to 40 K, or straining the sample to a displacement as large as epsilon = 3.1%, m akes the regular oscillations disappear. By analysing the data, we found ou r results can be interpreted as the quantum coherence effect of a moving CD W.