Data-driven exploration of new pressure-induced superconductivity in PbBi2Te4
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-12-20 |
| Journal | Science and Technology of Advanced Materials |
| Authors | Ryo Matsumoto, Zhufeng Hou, Masanori Nagao, Shintaro Adachi, Hiroshi Hara |
| Institutions | University of Yamanashi, Ehime University |
| Citations | 29 |
Abstract
Section titled āAbstractāCandidate compounds for new thermoelectric and superconducting materials, which have narrow band gap and flat bands near band edges, were exhaustively searched by the high-throughput first-principles calculation from an inorganic materials database named AtomWork. We focused on PbBi<sub>2</sub>Te<sub>4</sub> which has the similar electronic band structure and the same crystal structure with those of a pressure-induced superconductor SnBi<sub>2</sub>Se<sub>4</sub> explored by the same data-driven approach. The PbBi<sub>2</sub>Te<sub>4</sub> was successfully synthesized as single crystals using a melt and slow cooling method. The core level X-ray photoelectron spectroscopy analysis revealed Pb<sup>2+</sup>, Bi<sup>3+</sup> and Te<sup>2-</sup> valence states in PbBi<sub>2</sub>Te<sub>4</sub>. The thermoelectric properties of the PbBi<sub>2</sub>Te<sub>4</sub> sample were measured at ambient pressure and the electrical resistance was also evaluated under high pressure using a diamond anvil cell with boron-doped diamond electrodes. The resistance decreased with increasing of the pressure, and pressure-induced superconducting transitions were discovered at 2.5 K under 10 GPa. The maximum superconducting transition temperature increased up to 8.4 K at 21.7 GPa. The data-driven approach shows promising power to accelerate the discovery of new thermoelectric and superconducting materials.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2010 - CRC handbook of thermoelectrics