Tunnelling spectroscopy and the density of states of La0.8Ca0.2MnO3

被引：14

作者：

Biswas, A

Raychaudhuri, AK

机构：

[1] Department of Physics, Indian Institute of Science

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1996年 / 8卷 / 49期

关键词：

D O I：

10.1088/0953-8984/8/49/004

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 [凝聚态物理];

摘要：

We have used tunnelling spectroscopy (TS) to probe the density of states (DOS) near the Fermi level (E(F)) of La0.8Ca0.2MnO3, 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.

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页码：L739 / L745

页数：7

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