Superconductivity in Weyl semimetal candidate MoTe2

Yanpeng Qi, Pavel G. Naumov, Mazhar N. Ali, Catherine R. Rajamathi, Walter Schnelle, Oleg Barkalov, Michael Hanfland, Shu Chun Wu, Chandra Shekhar, Yan Sun, Vicky Süß, Marcus Schmidt, Ulrich Schwarz, Eckhard Pippel, Peter Werner, Reinald Hillebrand, Tobias Förster, Erik Kampert, Stuart Parkin, R. J. CavaClaudia Felser, Binghai Yan, Sergey A. Medvedev

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Abstract

Transition metal dichalcogenides have attracted research interest over the last few decades due to their interesting structural chemistry, unusual electronic properties, rich intercalation chemistry and wide spectrum of potential applications. Despite the fact that the majority of related research focuses on semiconducting transition-metal dichalcogenides (for example, MoS2), recently discovered unexpected properties of WTe2 are provoking strong interest in semimetallic transition metal dichalcogenides featuring large magnetoresistance, pressure-driven superconductivity and Weyl semimetal states. We investigate the sister compound of WTe2, MoTe2, predicted to be a Weyl semimetal and a quantum spin Hall insulator in bulk and monolayer form, respectively. We find that bulk MoTe2 exhibits superconductivity with a transition temperature of 0.10 K. Application of external pressure dramatically enhances the transition temperature up to maximum value of 8.2 K at 11.7 GPa. The observed dome-shaped superconductivity phase diagram provides insights into the interplay between superconductivity and topological physics.

Original languageEnglish (US)
Article number11038
JournalNature communications
Volume7
DOIs
StatePublished - Mar 14 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Qi, Y., Naumov, P. G., Ali, M. N., Rajamathi, C. R., Schnelle, W., Barkalov, O., Hanfland, M., Wu, S. C., Shekhar, C., Sun, Y., Süß, V., Schmidt, M., Schwarz, U., Pippel, E., Werner, P., Hillebrand, R., Förster, T., Kampert, E., Parkin, S., ... Medvedev, S. A. (2016). Superconductivity in Weyl semimetal candidate MoTe2. Nature communications, 7, [11038]. https://doi.org/10.1038/ncomms11038