Te vacancy-driven superconductivity in orthorhombic molybdenum ditelluride

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dc.contributor.authorCho, Suyeonko
dc.contributor.authorKang, Se Hwangko
dc.contributor.authorYu, Ho Sungko
dc.contributor.authorKim, Hyo Wonko
dc.contributor.authorKo, Wonheeko
dc.contributor.authorHwang, Sung Wooko
dc.contributor.authorHan, Woo Hyunko
dc.contributor.authorChoe, Duk-Hyunko
dc.contributor.authorJung, Young Hwako
dc.contributor.authorChang, Kee Jooko
dc.contributor.authorLee, Young Heeko
dc.contributor.authorYANG, HEEJUNko
dc.contributor.authorKim, Sung Wngko
dc.date.accessioned2017-07-04T02:24:13Z-
dc.date.available2017-07-04T02:24:13Z-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.created2017-06-20-
dc.date.issued2017-06-
dc.identifier.citation2D MATERIALS, v.4, no.2, pp.021030 - 021030-
dc.identifier.issn2053-1583-
dc.identifier.urihttp://hdl.handle.net/10203/224530-
dc.description.abstractTwo-dimensional (2D) transition metal dichalcogenides (TMDs) have received great attentions because of diverse quantum electronic states such as topological insulating (TI), Weyl semimetallic (WSM) and superconducting states. Recently, the superconducting states emerged in pressurized semimetallic TMDs such as MoTe2 and WTe2 have become one of the central issues due to their predicted WSM states. However, the difficulty in synthetic control of chalcogen vacancies and the ambiguous magneto transport properties have hindered the rigorous study on superconducting and WSM states. Here, we report the emergence of superconductivity at 2.1 K in Te-deficient orthorhombic T-d-MoTe2-x with an intrinsic electron-doping, while stoichiometric monoclinic 1T'-MoTe2 shows no superconducting state down to 10 mK, but exhibits a large magnetoresistance of 32 000% at 2 K in a magnetic field of 14 T originating from nearly perfect compensation of electron and hole carriers. Scanning tunnelling spectroscopy and synchrotron x-ray diffraction combined with theoretical calculations clarify that Te vacancies trigger superconductivity via intrinsic electron doping and the evolution of the Td phase from the 1T' phase below 200 K. Unlike the pressure-induced superconducting state of monoclinic MoTe2, this Te vacancy-induced superconductivity is emerged in orthorhombic MoTe2, which is predicted as Weyl semimetal, via electron-doping. This chalcogen vacancy induced-superconductivity provides a new route for cultivating superconducting state together with WSM state in 2D van der Waals materials.-
dc.languageEnglish-
dc.publisherIOP PUBLISHING LTD-
dc.titleTe vacancy-driven superconductivity in orthorhombic molybdenum ditelluride-
dc.typeArticle-
dc.identifier.wosid000402724500002-
dc.identifier.scopusid2-s2.0-85021061210-
dc.type.rimsART-
dc.citation.volume4-
dc.citation.issue2-
dc.citation.beginningpage021030-
dc.citation.endingpage021030-
dc.citation.publicationname2D MATERIALS-
dc.identifier.doi10.1088/2053-1583/aa735e-
dc.contributor.localauthorChang, Kee Joo-
dc.contributor.localauthorYANG, HEEJUN-
dc.contributor.nonIdAuthorCho, Suyeon-
dc.contributor.nonIdAuthorKang, Se Hwang-
dc.contributor.nonIdAuthorYu, Ho Sung-
dc.contributor.nonIdAuthorKim, Hyo Won-
dc.contributor.nonIdAuthorKo, Wonhee-
dc.contributor.nonIdAuthorHwang, Sung Woo-
dc.contributor.nonIdAuthorJung, Young Hwa-
dc.contributor.nonIdAuthorLee, Young Hee-
dc.contributor.nonIdAuthorKim, Sung Wng-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthortransition metal dichalcogenides-
dc.subject.keywordAuthorsuperconductivity-
dc.subject.keywordAuthortopological semimetal-
dc.subject.keywordPlusTRANSITION-METAL DICHALCOGENIDES-
dc.subject.keywordPlusTOPOLOGICAL FERMI ARCS-
dc.subject.keywordPlusSEMIMETAL WTE2-
dc.subject.keywordPlusPHASE-DIAGRAM-
dc.subject.keywordPlusWEYL-
dc.subject.keywordPlusMOTE2-
dc.subject.keywordPlusMAGNETORESISTANCE-
dc.subject.keywordPlusTEMPERATURE-
dc.subject.keywordPlusELECTRON-
dc.subject.keywordPlusMOS2-
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