Pressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride

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 5 d electronic orbitals, we boost the electronic properties by applying a high pressure, an...

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Published inNature communications Vol. 6; no. 1; p. 7805
Main Authors Pan, Xing-Chen, Chen, Xuliang, Liu, Huimei, Feng, Yanqing, Wei, Zhongxia, Zhou, Yonghui, Chi, Zhenhua, Pi, Li, Yen, Fei, Song, Fengqi, Wan, Xiangang, Yang, Zhaorong, Wang, Baigeng, Wang, Guanghou, Zhang, Yuheng
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 23.07.2015
Nature Publishing Group
Nature Pub. Group
Subjects
119/118
639/301/119/1003
639/301/119/995
Electrons
High pressure
Humanities and Social Sciences
multidisciplinary
Phase transitions
Physics
Science
Science (multidisciplinary)
Temperature
Transistors
Tungsten
China
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Summary: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 5 d 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. Tungsten ditelluride has been recently discovered to possess very large and unsaturated magnetoresistance, up to 60 T. Here the authors apply high pressure on this material and observe a dome-shaped superconducting phase transition.
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These authors contributed equally to this work.
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms8805