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The research team led by Fang Zhongzhong, a member of the Institute of Physics at the Chinese Academy of Sciences, discovered for the first time in a few days the foreign fermions (Weyl Fermions). Scientists believe this is an important scientific breakthrough in the field of physics research in the world and is of great significance to the breakthrough of disruptive technologies such as topological electronics and quantum computers. The discovery from the theoretical prediction of materials to the whole process of experimental observation is done independently by Chinese scientists.
Scientists divide basic particles into two major categories: bosons and fermions, and the fermions constitute the basic particles of matter. In 1929, German scientist Willman Neal pointed out that no "mass" (that is, linear dispersion) electrons can be divided into two different "chirals", levorotatory and dextrorotatory. This electron is named "alien fermion" . But almost 90 years later, people have not been able to observe the outer Fermions during the experiment.
In recent years, the rapid development of topological semiconductors, especially topological semimetals, has provided new ideas and approaches for the generation and observation of extra-fermions. In 2014, the theoretical research team of the Institute of Physics of the Chinese Academy of Sciences predicted for the first time that breakthroughs in the separation of two kinds of "chiral" electrons could be achieved in a tantalum-arsenic and other material systems.
This year, the Chen Genfu group of the Institute of Physics of the Chinese Academy of Sciences (CAS) first prepared bulk TaAs crystals with atomically flat surfaces. Later, the Dinghong team irradiated the TaAs crystals with a synchrotron radiation beam of the "Dreamline" of Shanghai Light Source, For the first time in front of scientists.
Scientists believe that the foreign metal fermion semi-metal can achieve low-energy electronic transmission, is expected to solve the current miniaturization of electronic devices and multi-functional energy problems facing the same time, Ferrets also topological protection, can be used Achieve high-fault-tolerant topology quantum computing.
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