Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3508
Title: Electronic properties of (Sb;Bi)2Te3 colloidal heterostructured nanoplates down to the single particle level
Authors: MIR, WASIM J.
Assouline, Alexandre
Livache, Clement
Martinez, Bertille
Goubet, Nicolas
Zhen, Xiang
Xu, Gilles Patriarche
Ithurria, Sandrine
Aubin, Herve
Lhuillier, Emmanuel
Dept. of Physics
Keywords: Single particle level
Electronic properties
Colloidal heterostructured
Nanoplates
Bismuth and antimony
2017
Issue Date: Aug-2017
Publisher: Nature Publishing Group
Citation: Scientific Reports, 7, 9647.
Abstract: We investigate the potential use of colloidal nanoplates of Sb2Te3 by conducting transport on single particle with in mind their potential use as 3D topological insulator material. We develop a synthetic procedure for the growth of plates with large lateral extension and probe their infrared optical and transport properties. These two properties are used as probe for the determination of the bulk carrier density and agree on a value in the 2–3 × 1019 cm−3 range. Such value is compatible with the metallic side of the Mott criterion which is also confirmed by the weak thermal dependence of the conductance. By investigating the transport at the single particle level we demonstrate that the hole mobility in this system is around 40 cm2V−1s−1. For the bulk material mixing n-type Bi2Te3 with the p-type Sb2Te3 has been a successful way to control the carrier density. Here we apply this approach to the case of colloidally obtained nanoplates by growing a core-shell heterostructure of Sb2Te3/Bi2Te3 and demonstrates a reduction of the carrier density by a factor 2.5.
URI: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3508
https://doi.org/10.1038/s41598-017-09903-w
ISSN: 2045-2322
Appears in Collections:JOURNAL ARTICLES

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