Tunnelling spectroscopy and the density of states of $La_{0.8}Ca_{0.2}MnO_3$

Biswas, Amlan and Raychaudhuri, AK (1996) Tunnelling spectroscopy and the density of states of $La_{0.8}Ca_{0.2}MnO_3$. In: Journal of Physics: Condensed Matter, 8 (49). L739-L745.

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Abstract

We have used tunnelling spectroscopy (TS) to probe the density of states (DOS) near the Fermi level $(E_F)$ of $La_{0.8}Ca_{0.2}MnO_3$, which shows giant magnetoresistance (GMR). The tunnelling current–voltage (I–V ) curves and their derivatives (dI/dV ) show significant changes for temperatures above and below the ferromagnetic Curie temperature $(T_C)$. We have estimated the energy dependence of the DOS near $E_F$ from the tunnelling spectroscopy data, and this shows a strong temperature dependence, for temperatures above and below $T_C$.

Item Type:	Journal Article
Publication:	Journal of Physics: Condensed Matter
Publisher:	Institute of Physics
Additional Information:	Copyright of this article belongs to Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	15 Dec 2006
Last Modified:	19 Sep 2010 04:33
URI:	http://eprints.iisc.ac.in/id/eprint/9161

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