The renowned academic journal Nature published the research paper "Mixing of Moiré-Surface and Bulk States in Graphite" on July 19, 2023, with Nanjing University of Aeronautics and Astronautics as the corresponding author unit and the university's Professor Yin Jun as a co-corresponding author.
The paper was jointly written by Yin from Academician Guo Wanlin's team at the Institute for Frontier Science and College of Aerospace Engineering of NUAA, and Professor A. Mishchenko from the team of Professor A. Geim, a Nobel Prize winner from the University of Manchester, among others.
The findings show that electronic states in three-dimensional (3D) crystals such as graphite can be tuned by a superlattice potential occurring at the interface with another crystal – namely, crystallographically aligned hexagonal boron nitride.
This alignment results in several Lifshitz transitions and Brown-Zak oscillations arising from near-surface states, whereas in high magnetic fields, fractal states of Hofstadter’s butterfly draw deep into the bulk of graphite.
The lifshitz transitions. [Photo/WeChat account: NUAA_1952]
The work shows a way in which 3D spectra can be controlled using 2D twistronics.
Yin has been engaged in research related to two-dimensional materials under the guidance of Guo since 2009 and has been deeply involved in this field for the past 14 years. This long-term persistence and accumulated expertise have laid a solid foundation for the development of this work.
Academician Guo Wanlin (R), Professor Yin Jun (L) and Nobel Prize winner Professor A. Geim take part in academic exchanges at the University of Manchester. [Photo/WeChat account: NUAA_1952]
