Shenzhen Advanced Research Institute has made important progress in the exploration of new high temperature and low pressure superconducting materials and the research of superconducting mechanism

Recently, Zhong Guohua and Li Wenjie, associate researchers of Shenzhen Institute of advanced technology, Chinese Academy of Sciences, have made important progress in the research of new high temperature and low pressure superconducting materials It is predicted that beryllium doped methane is a kind of metal and has superconductivity at low pressure Based on a large number of calculation data, the superconductivity law of beryllium doped methane is revealed The related achievements were published in Physical Chemistry Chemical Physics (DOI: 10.1039 / c9cp06008a) under the title of "metallization and superconductivity in metal done by beylilium at low pressure" Methane (CH4), as one of the simplest organic materials, has great potential in the study of superconductors Methane is composed of very light elements According to BCS theory, if it can be converted into metal, it will be a potential high temperature superconductor However, pure CH4 is a gas at atmospheric pressure and a wide band gap semiconductor Even if it is pressurized to 5 million atmospheres, it is predicted that it is not a metallic state This shows that the transformation of pure CH 4 into metal by simple pressurization is a great challenge In order to solve the above problems, Zhong Guohua and Li Wenjie, associate researchers of Shenzhen Advanced Institute, based on particle swarm optimization, density functional theory and density functional perturbation theory, put forward a new idea to realize the transition from insulator to metal, that is, by doping gold beryllium into methane molecule The crystal structure, electronic state and kinetic properties, and electron phonon interaction of beryllium doped methane were considered The results show that bech4 with P-1 space group structure can be transformed into metallic state at atmospheric pressure, and superconducting transition occurs With the increase of pressure, the maximum superconducting critical temperature can be increased by nearly 30 K This shows that the electron doped CH 4 is expected to be a new type of superconductor with low voltage and high critical temperature The results systematically reveal the spatial structure, metal ring and Superconductivity of the new superconductor under different pressures, which is of great significance for the exploration of new high temperature and low pressure superconductors The research was supported by Shenzhen basic research layout project, peacock program, joint fund of NSFC and China Academy of Engineering Physics.