Recently, Chinese Academy of Sciences Hefei Physical Institute of Solid State Physics, and the collaborative research team of Nanjing University and a strong magnetic field center, made new progress on the study of the WTe2 material physical properties under high pressure high magnetic field extreme conditions. The team used high-pressure diamond anvil cell technology, by studying the electrical transport and magnetic susceptibility, for the first time that observed the superconductivity of high-pressure-induced and magnetic resistance calculated by the theory of evolution and the superconductivity with pressure has been systematically studied, related to the results of "superconductivity and evolution of the electronic structure of the type" and titled by "tungsten telluride pressure-driven", published in "Nature - communication" on July 23, the solid researcher YangZhaorong and professor at Nanjing University Song Fengqi, Wan Xiangang are co-corresponding authors of this article.

 

High pressure is a clean, pure and powerful tool in researching new material properties, especially in the exploration of new superconducting materials. WTe2 is a kind of layered semi-metallic material, when the temperature is 0.53K, under strong magnetic field at 60T, the magnetoresistance can be up to 13,000,000%, and it still did not reach the saturation. This strange phenomenon has aroused wide attention of researchers at home and abroad. Recent theoretical studies suggest that it may be a kind of Weyl semi-metallic, magnetic resistance is considered to be related to the perfect match of the hole and electron carrier concentration of the Fermi surface nearby in the system, of which this perfect equilibrium is extremely sensitive for external perturbation, such as doping and stress.