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Superconductivity in Topological Insulator Sb2Te3 Induced by Pressure
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2013 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 3, 2016- p.Article in journal (Refereed) Published
Abstract [en]

Topological superconductivity is one of most fascinating properties of topological quantum matters that was theoretically proposed and can support Majorana Fermions at the edge state. Superconductivity was previously realized in a Cu-intercalated Bi2Se3 topological compound or a Bi2Te3 topological compound at high pressure. Here we report the discovery of superconductivity in the topological compound Sb2Te3 when pressure was applied. The crystal structure analysis results reveal that superconductivity at a low-pressure range occurs at the ambient phase. The Hall coefficient measurements indicate the change of p-type carriers at a low-pressure range within the ambient phase, into n-type at higher pressures, showing intimate relation to superconducting transition temperature. The first principle calculations based on experimental measurements of the crystal lattice show that Sb2Te3 retains its Dirac surface states within the low-pressure ambient phase where superconductivity was observed, which indicates a strong relationship between superconductivity and topology nature.

Place, publisher, year, edition, pages
2013. Vol. 3, 2016- p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-204105DOI: 10.1038/srep02016ISI: 000320647900001OAI: oai:DiVA.org:uu-204105DiVA: diva2:637842
Available from: 2013-07-23 Created: 2013-07-22 Last updated: 2017-12-06Bibliographically approved

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Ahuja, Rajeev

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