On November 3, we were pleased to have Prof. Di Zengfeng, Deputy Director of Shanghai Institute of Microsystems and Information Technology (SIMIT), deliver an online lecture on "Study on novel physical phenomena in Ge-based graphene heterojunctions."
Prof. Di started from his undergraduate period at Nanjing University, recalling his experience in scientific research during the four years. He encouraged students to actively participate in relevant training and cultivate their interest in scientific research.
Next, Prof. Di introduced some of his recent research topics.
The first one was the development of epitaxial technology and integrated circuits. To illustrate the concept of wafers, he compared the integrated circuits as a huge building, the wafer as its foundation.
Another one he introduced was the heteroepitaxial technology, whose core was lattice matching.
Prof. Di also pointed out that our technology of integrated circuits was not developed enough and easy to be restrained by foreign countries because domestic research began relatively late. But in recent years, Chinese scientists are working hard to narrow the gap and to develop our independent integrated circuits technology.
The physical properties of Mohr stripes were introduced then, including the carrier transport phenomenon, the realization of functionalized graphene to maintain super-lubrication, and so on.
In the second part of his lecture, Prof. Di explained the novel physical phenomena of heterogeneous interfaces, including graphene nanobubble's arrays and pseudo-magnetic field physical characteristics, etc.
In the third part, he introduced the novel physical phenomena in intrinsic germanium/graphene, for example, the perfect two-dimensional electron gas it exhibits and two-dimensional superconducting phase transition, a hot research topic in condensed matter physics.
After the presentation, Prof. Di interacted with the students present and gave them useful suggestions for their studies.
In conclusion, the insightful lecture helped students explore their interests and clear research directions.
