Pressure-driven dome-shaped superconductivity and electronic structural evolution in tungsten ditelluride
| Autor: | Zhongxia Wei, Huimei Liu, Xingchen Pan, L I Pi, Xiangang Wan, Zhaorong Yang, Yuheng Zhang, Fengqi Song, Yanqing Feng, Zhenhua Chi, Guanghou Wang, Yonghui Zhou, Baigeng Wang, Fei Yen, Xuliang Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Magnetoresistance
FOS: Physical sciences General Physics and Astronomy chemistry.chemical_element Nanotechnology Tungsten Instability Article General Biochemistry Genetics and Molecular Biology Superconductivity (cond-mat.supr-con) symbols.namesake Condensed Matter - Strongly Correlated Electrons Phase (matter) Condensed Matter::Superconductivity Physics Superconductivity Multidisciplinary Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Condensed Matter - Superconductivity Fermi level Fermi surface General Chemistry chemistry Density of states symbols |
| Zdroj: | Nature Communications |
| Popis: | 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 (Tc) of 7 K at around 16.8 GPa, followed by a monotonic decrease in Tc 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 Tc 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. |
| Databáze: | OpenAIRE |
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