In order to better explain the mechanism of superconductivity enhancement of heavy stacking tantalum disulfide thin films, the research team used density functional theory to simulate and analyze the electronic structure of the two materials. The results show that the electron delocalization at the interface is enhanced due to the distortion between layers, which leads to the increase of electron density near Fermi surface and the enhancement of superconductivity. Tantalum disulfide film is higher in temperature.
The monolayer tantalum disulfide nano-sheet is chemically separated and the nano-sheet is filtered and self-assembled and then stacked to form tantalum disulfide thin film. The reassembled tantalum disulfide film broke the crystal structure of the original matrix, formed a rich homogenous interface, and obtained a higher superconducting transition temperature and a larger upper critical field than the parent material. The research was published in the journal of the American chemical society. The following with embedded editor to learn about the relevant content.
Since the discovery of superconductivity in 1911, the study of superconductivity has become the brightest jewel in the crown of condensed matter physics. At present, superconducting materials have been applied in various aspects, including superconducting wires, superconducting mri machines used in hospitals and magnetic levitation trains. However, despite the many advantages of superconducting materials, the cost is still too high to spread widely, as the highest superconducting temperature of the current superconducting material is more than minus 100 degrees Celsius. Therefore, the pursuit of higher temperature and even room temperature superconductivity is the dream of physicists, but also of great practical value.
"At present, the exploration of HTS is difficult due to the lack of theoretical support." According to pan jie, the first author of the paper and a postgraduate student at Shanghai institute of silicate, the traditional BCS theory based on weak electro-acoustic interaction cannot explain the mechanism of superconductivity above 40K, so a more complete and profound theory is needed to explain the phenomenon of high-temperature superconductivity and provide a guiding light for the exploration of high-temperature superconductivity. The discovery of interface superconductivity is a new highlight in the field of superconductivity in recent years. However, it has not been reported that the interface regulates the electronic structure of 2H-TaS2.
