On the 7th, it was learned from Nanjing University that Professor Miao Feng and Associate Professor Liang Shijun from the School of Physics of the university, together with Professor Cheng Bin from Nanjing University of Technology, observed the coexistence of electronic ferroelectricity and topological boundary states by constructing a special stacking configuration of magic angle graphene devices. Based on optional quasi continuous ferroelectric switches, a noise immune brain like computing scheme was proposed for the first time. This work has opened up a new technological path for the development of new low-power electronic devices based on topological boundary states. The related achievements have recently been published in the international academic journal Nature Nanotechnology. The operation of semiconductor chips relies on electronic transmission. In traditional materials, the trajectory of electronic transmission is irregular like that of vehicles traveling at intersections, consuming a significant amount of energy. In topological quantum materials, there exists a "highway" for electron transfer - topological boundary states. By changing the material aging number as needed, the control of the number of topological boundary states can be achieved, and it is expected to develop a new computing technology using topological boundary states as a new information carrier. Moir é superlattice materials are a type of material system formed by constructing special two-dimensional material heterojunction interface structures. The research team first constructed a brand new Moir é heterojunction structure. They found that after removing the applied external electric field, the polarization in the Mohr system did not disappear, indicating the existence of ferroelectricity. Under a vertical magnetic field, Chen insulators emerge in the material, allowing researchers to use ferroelectric polarization to regulate different Chen numbers and achieve non-volatile switching of different topological boundary states. Subsequently, they achieved quasi continuous ferroelectric switching function in magic angle bilayer graphene devices. Finally, the team utilized the topological boundary states of ferroelectric insulators as information carriers and proposed a noise immune brain like computing scheme. This study mainly focuses on concept validation. In the future, we still need to overcome many challenges such as the transfer of large-area materials, the large-scale integration of devices, and the development of peripheral adaptation circuits, to achieve the development of topological quantum brain computing chip prototypes and explore their applications in practical scenarios Miao Feng said. (Lai Xin She)
Edit：Xiong Dafei Responsible editor：Li Xiang
Source：CCTV
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