Journal
NATURE COMMUNICATIONS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms8805
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Funding
- National Key Projects for Basic Research of China [2013CB922103, 2011CBA00111, 2011CB922103]
- National Natural Science Foundation of China [91421109, 11134005, 61176088, 11222438, U1332143, 51372249, 11374307, 11374137, 91122035, 11174124, 11274003]
- PAPD project
- Natural Science Foundation of Jiangsu Province [BK20130054]
- Fundamental Research Funds for the Central Universities
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Tungsten ditelluride has attracted intense research interest due to the recent discovery of its large unsaturated magnetoresistance up to 60 T. Motivated by the presence of a small, sensitive Fermi surface of 5d electronic orbitals, we boost the electronic properties by applying a high pressure, and introduce superconductivity successfully. Superconductivity sharply appears at a pressure of 2.5 GPa, rapidly reaching a maximum critical temperature (T-c) of 7 K at around 16.8 GPa, followed by a monotonic decrease in T-c with increasing pressure, thereby exhibiting the typical dome-shaped superconducting phase. From theoretical calculations, we interpret the low-pressure region of the superconducting dome to an enrichment of the density of states at the Fermi level and attribute the high-pressure decrease in T-c to possible structural instability. Thus, tungsten ditelluride may provide a new platform for our understanding of superconductivity phenomena in transition metal dichalcogenides.
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