Conductivity oscillations in current-induced metastable states in low-doped manganite single crystals

V. Dikovsky, Y. Yuzhelevski, V. Markovich, G. Gorodetsky, G. Jung, D. A. Shulyatev, and Ya. M. Mukovskii
Phys. Rev. B 65, 144439 – Published 3 April 2002
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Abstract

Deterministic oscillations of current-induced metastable resistivity in changing voltage have been detected in La0.82Ca0.18MnO3 single crystals. At low temperatures, below the Curie point, application of specific bias procedures switches the crystal into a metastable resistivity state characterized by the appearance of pronounced reproducible and random structures in the voltage dependence of the differential conductivity. In a certain bias range equally spaced broad conductivity peaks have been observed. The oscillating conductivity has been tentatively ascribed to resonances in a quantum well within the double-tunnel barrier of intrinsic weak links associated with twinlike defect boundaries.

  • Received 17 September 2001

DOI:https://doi.org/10.1103/PhysRevB.65.144439

©2002 American Physical Society

Authors & Affiliations

V. Dikovsky, Y. Yuzhelevski, V. Markovich, G. Gorodetsky, and G. Jung*

  • Department of Physics, Ben Gurion University of the Negev, P.O. Box 653, 84105 Beer-Sheva, Israel

D. A. Shulyatev and Ya. M. Mukovskii

  • Moscow State Steel and Alloys Institute, 117936, Moscow, Russia

  • *Also with Institute of Physics, PAN, 02-668 Warszawa, Poland.

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Issue

Vol. 65, Iss. 14 — 1 April 2002

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