학술논문
Metallic characteristics in superlattices composed of insulators, NdMnO3 /SrMnO3 /LaMnO3 .
Document Type
Article
Author
Source
Subject
*SUPERLATTICES
*PHOTOEMISSION
*X-ray spectroscopy
*FERMI surfaces
*MAGNETIZATION
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Language
ISSN
0003-6951
Abstract
We report on the electronic properties of superlattices composed of three different antiferromagnetic insulators, NdMnO3/SrMnO3/LaMnO3 grown on SrTiO3 substrates. Photoemission spectra obtained by tuning the x-ray energy at the Mn 2p→3d edge show a Fermi cut-off, indicating metallic behavior mainly originating from Mn eg electrons. Furthermore, the density of states near the Fermi energy and the magnetization obey a similar temperature dependence, suggesting a correlation between the spin and charge degrees of freedom at the interfaces of these oxides. [ABSTRACT FROM AUTHOR]