DSpace Repository

Direct evidence of strong local ferroelectric ordering in a thermoelectric semiconductor

Show simple item record

dc.contributor.author Aggarwal, Leena
dc.contributor.author Sekhon, Jagmeet S.
dc.contributor.author Guin, Satya N.
dc.contributor.author Arora, Ashima
dc.contributor.author Negi, Devendra S.
dc.contributor.author Datta, Ranjan
dc.contributor.author Biswas, Kanishka
dc.contributor.author Sheett, Goutam
dc.date.accessioned 2017-02-21T08:58:11Z
dc.date.available 2017-02-21T08:58:11Z
dc.date.issued 2014
dc.identifier.citation Aggarwal, L; Sekhon, JS; Guin, SN; Arora, A; Negi, DS; Datta, R; Biswas, K; Sheett, G, Direct evidence of strong local ferroelectric ordering in a thermoelectric semiconductor. Applied Physics Letters 2014, 105 (11), 113903 http://dx.doi.org/10.1063/1.4895936 en_US
dc.identifier.citation Applied Physics Letters en_US
dc.identifier.citation 105 en_US
dc.identifier.citation 11 en_US
dc.identifier.issn 0003-6951
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2494
dc.description Restricted Access en_US
dc.description.abstract It is thought that the proposed new family of multi-functional materials, namely, the ferroelectric thermoelectrics may exhibit enhanced functionalities due to the coupling of the thermoelectric parameters with ferroelectric polarization in solids. Therefore, the ferroelectric thermoelectrics are expected to be of immense technological and fundamental significance. As a first step towards this direction, it is most important to identify the existing high performance thermoelectric materials exhibiting ferroelectricity. Herein, through the direct measurement of local polarization switching, we show that the recently discovered thermoelectric semiconductor AgSbSe2 has local ferroelectric ordering. Using piezo-response force microscopy, we demonstrate the existence of nanometer scale ferroelectric domains that can be switched by external electric field. These observations are intriguing as AgSbSe2 crystalizes in cubic rock-salt structure with centro-symmetric space group (Fm-3m), and therefore, no ferroelectricity is expected. However, from high resolution transmission electron microscopy measurement, we found the evidence of local superstructure formation which, we believe, leads to local distortion of the centro-symmetric arrangement in AgSbSe2 and gives rise to the observed ferroelectricity. Stereochemically active 5S(2) lone-pair of Sb may also give rise to local structural distortion thereby creating ferroelectricity in AgSbSe2. (C) 2014 AIP Publishing LLC. en_US
dc.description.uri 1077-3118 en_US
dc.description.uri http://dx.doi.org/10.1063/1.4895936 en_US
dc.language.iso English en_US
dc.publisher American Institute of Physics en_US
dc.rights @American Institute of Physics, 2014 en_US
dc.subject Applied Physics en_US
dc.subject Performance Bulk Thermoelectrics en_US
dc.subject Piezoresponse Force Microscopy en_US
dc.subject Phonon-Scattering en_US
dc.subject Thin-Films en_US
dc.subject Conductivity en_US
dc.subject Nanostructures en_US
dc.subject Enhancement en_US
dc.subject Distortion en_US
dc.subject Figure en_US
dc.subject Merit en_US
dc.title Direct evidence of strong local ferroelectric ordering in a thermoelectric semiconductor en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Advanced Search

Browse

My Account