New macroscopic quantum state in perovskite-crystalline conductor with localized carrier system

Authors
Sugahara, H Ogi, S Araki, K Ueda, Y Shimoda, R Sugiura, R
Citation
H. Sugahara et al., New macroscopic quantum state in perovskite-crystalline conductor with localized carrier system, INT J MOD B, 14(10), 2000, pp. 1025-1035
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
ISSN journal
02179792 → ACNP
Volume
14
Issue
10
Year of publication
2000
Pages
1025 - 1035
Database
ISI
SICI code
0217-9792(20000420)14:10<1025:NMQSIP>2.0.ZU;2-C
Abstract
The large zero-point oscillation of energy similar to 0.1-1 eV of strong co upling hole carriers in layered perovskite (LP) conductor is shown to provi de effective field B* similar to 10(3-4) T causing fractional quantum Hall effect (FQHE) when space charge and moderate localization are present. The quasiparticle excitation spectrum of the FQHE system is calculated. The FQH E state is a macroscopic quantum state where macroscopic interference effec t is expected. Using (001) La2-xSrxCuO4-y (LSCO) film, we observed "dc diel ectric interference" and the interference effect at 28 THz, which are expli cable by the FQHE in the layered perovskite film.