Roman GłogulskiA team of scientists from the Hefei Institutes of Physical Science, Chinese Academy of Sciences, has received support from the Steady High Magnetic Field Facility (SHMFF) laboratory for their research on electrical transport and magnetic measurements. As a result, they have discovered a new superconducting material called (InSe2)xNbSe2, which possesses a unique crystalline structure. This material has a superconducting transition temperature of 11.6 K, making it the transition metal sulfide superconductor with the highest transition temperature under normal pressure.
TMD materials have long attracted significant attention due to their diverse applications in catalysis, energy storage, and integrated circuits. However, their potential applications have been limited by their relatively low superconducting transition temperature.
In this study, the scientists fabricated a new superconducting material with the chemical formula (InSe2)xNbSe2. Unlike typical conditions where single atoms are inserted into van der Waals gaps in low-dimensional materials, (InSe2)xNbSe2 was found to have tightly connected chains formed by the inserted indium atoms bonded to InSe2.
“This material has a very high transition temperature among all transition metal dichalcogenide (TMD) superconductors,” said Professor Zhang Changjin, who led the research team. “It also exhibits an impressive critical current density.”
The superconducting transition temperature of the (InSe2)0.12NbSe2 sample can reach up to 11.6 K under normal pressure, which is 60% higher than pure NbSe2.
Furthermore, the (InSe2)xNbSe2 superconductor demonstrates a high critical current density of 8×105 A/cm2, which is also the highest value among all TMD superconductors. This critical current density is comparable to high-temperature superconductors such as cuprates and iron-based compounds, indicating its promising applications.
This discovery opens up new possibilities for research on superconductivity and the development of high-temperature superconductors with improved properties, according to the research team.
Source:
Rui Niu et al, Enhanced Superconductivity and Critical Current Density Due to the Interaction of InSe2 Bonded Layer in (InSe2)0.12NbSe2, Journal of the American Chemical Society (2024). DOI: 10.1021/jacs.3c09756
The source of the article is from the blog jomfruland.net
