Anomalous acoustoelectric effect in La_{0.67}Ca_{0.33}MnO_{3} films

We have studied acoustoelectric (AE) effect produced by surface acoustic waves (SAW) in a monolithic layered structure, composed of piezodielectric LiNbO_{3} substrate and La_{0.67}Ca_{0.33}MnO_{3} film. The experiments unexpectedly revealed in the longitudinal AE effect an anomalous contribution, i...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2001-10
Main Authors: Ilisavskii, Y, Goltsev, A, Dyakonov, K, Popov, V, Yakhkind, E, Dyakonov, V P, Gierlowski, P, Klimov, A, Lewandowski, S J, Szymczak, H
Format: Article
Language:English
Subjects:
Deformation mechanisms
Elastic deformation
Insulators
Manganese oxides
Metal-insulator transition
Substrates
Surface acoustic waves
Wave propagation
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have studied acoustoelectric (AE) effect produced by surface acoustic waves (SAW) in a monolithic layered structure, composed of piezodielectric LiNbO_{3} substrate and La_{0.67}Ca_{0.33}MnO_{3} film. The experiments unexpectedly revealed in the longitudinal AE effect an anomalous contribution, invariant upon reversal of SAW propagation, which coexists with the ordinary (odd in wave vector) effect. The anomalous effect dominates near the metal-insulator transition, while the ordinary effect prevails at high and low temperatures. We show that the anomalous effect is caused by strong modulation of the film conductivity produced by the SAW elastic deformations.
ISSN:2331-8422
DOI:10.48550/arxiv.0110410