Institute of Physics, CAS
Epitaxial Growth and Properties of Novel 2D Materials beyond Graphene
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
The novel properties of graphene honeycomb structure have spurred tremendous interest in investigating other two-dimensional (2D) layered structures beyond graphene for nanodevices. In this talk, I will report the fabrication and properties of several 2D materials beyond graphene, such as, silicene[1,9], germanene[2,10] hafnene and antimonene, wherein silicon (germanium, hafnium or antimony) atoms are substituted for carbon atoms in graphene. Besides mono-elemental 2D atomic crystals, bi-elemental 2D materials like new semiconducting transition-metal-dichalcogenide monolayer PtSe2[5,8] and superconductor transition-metal-trichalcogenide (HfTe3), grown by direct selenization/tellurization of the Pt/Hf substrate, and their application exploring in nanoelectronics and valleytronics will also be introduced. Molecular beam epitaxial (MBE) growth technique is used to form large-scale single-crystalline materials on solid surfaces. In addition, the stacking heterolayers based on several these kinds of 2D materials, for instance, a superconductor-topological insulator layered heterostructure for Majorana bound states will be also presented . We expect that these materials will show intriguing physical property and promising potential applications in nanoscale devices.
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(10) Zhihui Qin, et al.,Adv. Mater. DOI: 10.1002/adma.1606046 (2017).
Yeliang WANG was an undergraduate in material science at the Wuhan University of Technology, after which he moved to Institute of Physics, Chinese Academy of Sciences (CAS) where he studied condensed matter physics and was awarded a PhD in 2004. He then joined in the nanoscale science department (hosted by Prof. Klaus Kern) as a visiting scientist and Humboldt fellow in the Max-Planck-Institute, Germany. In 2008, he was appointed to a professorship in the Institute of Physics, CAS (in the dapartment hosted by Prof. Hong-jun Gao).
The research interests of Prof.Yeliang WANG include the intersections between physics, chemistry, and materials science. He currently focuses on the epitaxial growth of high-quality large-scale two-dimensional materials, including graphene, silicene, germanene, transition-metal-dichalcogenide and their complex. The structural and physical properties of these novel systems are explored by several advanced techniques like LEED, STM/STS, Raman, XPS and ARPES. He held more than 70 papers published on high-profile journals including Phy.Rev.Lett, Nano Letters, J.Am.Chem.Soc, and so on.