Evidence for direct and indirect gap in FeSi from electron tunneling spectroscopy

We report electron tunneling spectroscopy studies on single crystalline FeSi sample performed for the case of homogeneous tunnel junction contacts and for the case of counter electrodes made from Pt-Rh alloy. Our results reveal that while the tunneling spectroscopy in the configuration with Pt-Rh ti...

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Bibliographic Details
Published in:arXiv.org 2020-10
Main Authors: Baťková, M, Baťko, I, Mihalik, M
Format: Article
Language:English
Subjects:
Density of states
Electron tunneling
Energy gap
Iron silicide
Rhodium
Rhodium base alloys
Spectrum analysis
Tunnel junctions
Online Access:Get full text
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Summary:We report electron tunneling spectroscopy studies on single crystalline FeSi sample performed for the case of homogeneous tunnel junction contacts and for the case of counter electrodes made from Pt-Rh alloy. Our results reveal that while the tunneling spectroscopy in the configuration with Pt-Rh tip is preferably sensitive to the d-partial density of states and to the indirect energy gap, the FeSi-FeSi type of tunnel junction yields spectroscopic information on the c-partial density of states and on the direct gap in FeSi.
ISSN:2331-8422
DOI:10.48550/arxiv.2010.10838