Superconductivity in Weyl semimetal candidate MoTe2
By Y. Qi, P. Naumov, Mazhar N. Ali, Catherine R. Rajamathi, W. Schnelle, O. Barkalov, M. Hanfland, Shu-chun Wu, C. Shekhar, Yan Sun and 13 more. Nature Communications, 2015
715 citations recorded by the source corpus.
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. Materials which simultaneously exhibit superconductivity and topologically non-trivial electronic band structure possess potential applications in quantum computing but have yet to be found. Here, the authors find superconductivity in MoTe2, a material predicted to be topologically non-trivial.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/9f644ebf90a651caa6e3b81dc1f2a71fb68267c2
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Citations in the corpus
- Fermi Arcs and Their Topological Character in the Candidate Type-II Weyl Semimetal MoTe 2 (2016, methodology): “The intricate relation of CTSS to the Weyl points of the system is evident from the fact that a Fermi arc with very similar dispersion was also reported in the calculations of Refs.”