Ultrathin septuple layered PbBi2Se4 nanosheets

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Title:	Ultrathin septuple layered PbBi2Se4 nanosheets
Authors:	Chatterjee, Arindom Guin, Satya N. Biswas, Kanishka
Keywords:	Physical Chemistry Atomic, Molecular & Chemical Physics Enhanced Thermoelectric Properties Topological-Insulator Bi2Te3 Nanostructures Thickness Bi2Se3 Phase
Issue Date:	2014
Publisher:	Royal Society of Chemistry
Citation:	Chatterjee, A; Guin, SN; Biswas, K, Ultrathin septuple layered PbBi2Se4 nanosheets. Physical Chemistry Chemical Physics 2014, 16 (28) 14635-14639, http://dx.doi.org/10.1039/c4cp01885k Physical Chemistry Chemical Physics 16 28
Abstract:	Layered lead bismuth selenide, PbBi2Se4, an intergrowth compound of PbSe (rocksalt) and Bi2Se3 (hexagonal), is a topological insulator in the bulk phase. We present a simple solution based synthesis of two dimensional (2D) few seven atomic (septuple) layered PbBi2Se4 nanosheets (4-7 nm thick) for the first time. The excellent electrical transport in ultrathin PbBi2Se4 is attributed to the presence of dominant surface states that offer high electrical mobility (similar to 153 cm(2) V-1 s(-1)) and scattering resistant carriers. Ultrathin 3-5 SLs PbBi2Se4 shows an n-type semiconducting behaviour with a band gap of similar to 0.6 eV, which is confirmed by optical spectroscopy and thermopower measurements.
Description:	Restricted Access
URI:	https://libjncir.jncasr.ac.in/xmlui/10572/2500
ISSN:	1463-9076
Appears in Collections:	Research Papers (Kaniska Biswas)

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