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Effect of potassium doping on electronic structure and thermoelectric properties of topological crystalline insulator

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dc.contributor.author Roychowdhury, Subhajit
dc.contributor.author Shenoy, U. Sandhya
dc.contributor.author Waghmare, Umesh V.
dc.contributor.author Biswas, Kanishka
dc.date.accessioned 2017-01-24T06:36:53Z
dc.date.available 2017-01-24T06:36:53Z
dc.date.issued 2016
dc.identifier.citation Roychowdhury, S.; Shenoy, U. S.; Waghmare, U. V.; Biswas, K., Effect of potassium doping on electronic structure and thermoelectric properties of topological crystalline insulator. Applied Physics Letters 2016, 108 (19), 5 http://dx.doi.org/10.1063/1.4948969 en_US
dc.identifier.citation Applied Physics Letters en_US
dc.identifier.citation 108 en_US
dc.identifier.citation 19 en_US
dc.identifier.issn 0003-6951
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2208
dc.description Restricted Access en_US
dc.description.abstract Topological crystalline insulator (TCI), Pb0.6Sn0.4Te, exhibits metallic surface states protected by crystal mirror symmetry with negligibly small band gap. Enhancement of its thermoelectric performances needs tuning of its electronic structure particularly through engineering of its band gap. While physical perturbations tune the electronic structure of TCI by breaking of the crystal mirror symmetry, chemical means such as doping have been more attractive recently as they result in better thermoelectric performance in TCIs. Here, we demonstrate that K doping in TCI, Pb0.6Sn0.4Te, breaks the crystal mirror symmetry locally and widens electronic band gap, which is confirmed by direct electronic absorption spectroscopy and electronic structure calculations. K doping in Pb0.6Sn0.4Te increases p-type carrier concentration and suppresses the bipolar conduction via widening a band gap, which collectively boosts the thermoelectric figure of merit (ZT) to 1 at 708 K. Published by AIP Publishing. en_US
dc.description.uri 1077-3118 en_US
dc.description.uri http://dx.doi.org/10.1063/1.4948969 en_US
dc.language.iso English en_US
dc.publisher American Institute Physics en_US
dc.rights @American Institute Physics, 2016 en_US
dc.subject Physics en_US
dc.subject Linear Magnetoresistance en_US
dc.subject Lead-Telluride en_US
dc.subject Performance en_US
dc.subject Figure en_US
dc.subject Phase en_US
dc.subject Merit en_US
dc.subject Band en_US
dc.subject Nanostructures en_US
dc.subject Pb1-Xsnxse en_US
dc.subject Breaking en_US
dc.title Effect of potassium doping on electronic structure and thermoelectric properties of topological crystalline insulator en_US
dc.type Article en_US


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