Xu, Hongqi


Research Interests: Quantum Devices, semiconductor physics, nanoelectronics

Office Phone: 86-10-6275 1761

Email: hqxu@pku.edu.cn

Xu, Hongqi is currently Chair Professor at Peking University of China. He received the B.S. degree in physics from the Dalian University of Technology, China, in 1982 and the Ph.D. degree in condensed matter physics from Lund University, Sweden, in 1991. From 1991 to 1993, he was a Postdoctoral Fellow at Link?ping University, Sweden. From 1993 to 1995, he was a Research Associate at Lund University, where he was appointed as Assistant Professor in 1995-2001, Associate Professor in 2001-2003, and Full Professor in 2003-2014. He was appointed Chair Professor at Peking University in 2010. His current research interests include experimental and theoretical studies of electrical and optical properties of semiconductor nanostructures, quantum phenomena of electron transport in solid state systems, Majorana fermions in the solid state, topological states of matter, strongly correlated systems, spin correlation, spin dynamics, and spintronic devices, nanoelectronic devices, photonic and photovoltaic devices, light-matter interaction phenomena, etc.

Professor Xu has published more than 200 papers in top scientific journals, including Science, Nature Nanotechnology, Nature Communications, Physical Review Letters, Nano Letters, Advanced Materials, Physical Review B, and has made more than 400 presentations in scientific conferences and workshops, of which more than 100 were his invited plenary lectures and talks. He has been the Chair of the 33rd International Conference on the Physics of Semiconductors (ICPS 2016), and has served the Technical Program Committees or International Advisory Committees of various international scientific conferences. He is an Associate Editor of Frontier of Physics and an Editorial Board member of Scientific Reports and of Semiconductor Science and Technology. He has been appointed visiting professor at several universities and institutions including RIKEN (Japan), Lund University (Sweden), Dalian University of Technology, Institute of Physics and Institute of Semiconductors of the Chinese Academy of Sciences. He has been awarded Distinguished Oversee Chinese Scholar of the Chinese Academy of Sciences in 2004 and prestigious “Thousand talents program” Professor of China in 2010.

Professor Xu has been awarded more than 20 research grants including those from NSFC, MOST of China, Swedish Research Council, and European Commission. He was a chief Scientist of a 973 program of China. His recent research achievements include:

1) Observation of signatures of Majorana fermions in topological superconducting nanowires. Search for Majorana fermions in the solid state is one of the most important research topics of today in the world. His group is one of two pioneer groups in the world that first observed the signatures of Majorana fermions in topological superconducting nanowires made from semiconductor InSb nanowires. The observation has made tremendous impact to the field.

2) Realization and investigation of quantum devices. Technology for realizing quantum devices from narrow bandgap semiconductor nanowires has been developed and various quantum devices including multiple quantum dots and Josephson junction devices have been fabricated. Novel physics such as correlation-induced conductance suppression, supercurrent and Andreev bound states, singlet-doublet phase transition, have been found and investigated with these devices.

3) Realization of nanoelectronic and optoelectronic devices with semiconductor nanostructures and 2D materials. Several novel nanoelectronic and optoelectronic devices have been realized with semiconductor nanowires and 2D materials, including graphene-based ballistic junction devices and photodetectors, InAs and InSb nanowire based FETs, semiconductor nanowire solar cells. In particular, the novel concept of piezoelectric photovoltaics with core-shell nanowires has been developed. The concept offers an opportunity to construct solar cells without using p-n junctions.