Superconductivity in Weyl semimetal candidate MoTe2
2016; Nature Portfolio; Volume: 7; Issue: 1 Linguagem: Inglês
10.1038/ncomms11038
ISSN2041-1723
AutoresYanpeng Qi, Pavel G. Naumov, Mazhar N. Ali, Catherine R. Rajamathi, Walter Schnelle, O.I. Barkalov, Michael Hanfland, Shu-Chun Wu, Chandra Shekhar, Yan Sun, Vicky Süß, Marcus Schmidt, Ulrich Schwarz, Eckhard Pippel, P. Werner, R. Hillebrand, Tobias Förster, Erik Kampert, S. Parkin, R. J. Cava, Claudia Felser, Binghai Yan, Sergey A. Medvedev,
Tópico(s)Topological Materials and Phenomena
ResumoAbstract 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, MoS 2 ), recently discovered unexpected properties of WTe 2 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 WTe 2 , MoTe 2 , predicted to be a Weyl semimetal and a quantum spin Hall insulator in bulk and monolayer form, respectively. We find that bulk MoTe 2 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.
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