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Transport properties of VSe2 monolayers separated by bilayers of BiSe

Published online by Cambridge University Press:  21 December 2015

Omar K. Hite ,
Michael Nellist ,
Jeffery Ditto ,
Matthias Falmbigl  and
David C. Johnson
Omar K. Hite*
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA
Michael Nellist
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA
Jeffery Ditto
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA
Matthias Falmbigl
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA
David C. Johnson*
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403-1253, USA
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The [(BiSe)1+δ]1(VSe2)1 heterostructure was characterized structurally and electrically to determine the effects of interlayer interaction on the charge density wave (CDW) found in VSe2 and compared to previously reported [(SnSe)1.15]1(VSe2)1. Out-of-plane x-ray diffraction scans contain reflections that can be indexed as 00l reflections of a BiSe–VSe2 supercell. Structure refinement indicates that the VSe2 layer is very similar structurally to that found in [(SnSe)1.15]1(VSe2)1. Scanning transmission electron microscopy images show a turbostratically disordered layer structure and the formation of anti-phase boundaries in the BiSe bilayer. The [(BiSe)1+δ]1(VSe2)1 heterostructure is metallic with a negative Hall coefficient, in contrast to the positive Hall coefficient found for [(SnSe)1.15]1(VSe2)1. The CDW found [(SnSe)1.15]1(VSe2)1 is not present in [(BiSe)1+δ]1(VSe2)1. This work illustrates the importance of inter constituent interactions in determining the transport properties of single layer films.

Keywords

nanostructureelectrical propertiesmetallic conductor
Type
Invited Articles
Information
Journal of Materials Research , Volume 31 , Issue 7: Focus Issue: Two-Dimensional Heterostructure Materials , 14 April 2016 , pp. 886 - 892
Copyright
Copyright © Materials Research Society 2015 

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