Selective-area-epitaxied planar PbTe-superconductor nanowires as a new platform for topological quantum computing
by
TDLI Meeting Room N600 (East Wing of Floor 6, North Building)Prof. Ke He, Tsinghua UniversityVProf. Ke He, Tsinghua UniversityProf. Ke He, Tsinghua UniversityProf. Ke He, Tsinghua UniversityProf. Ke He, Tsinghua UniversityProf. Ke He, Tsinghua University
Semiconductor-superconductor hybrid nanowire is one of the major platforms for realizing Majorana zero modes (MZMs) and topological quantum computing (TQC). III-V InAs and InSb-based hybrid nanowires have been the most-studied materials in this approach. Despite years of efforts on material improvement and optimization, high-density defects and impurities in the nanowire samples remain the central problem hindering the research progress in the direction. In recent years, a new candidate Majorana nanowire system—IV-VI semiconductor PbTe-superconductor hybrid nanowire—have attracted much attention and witnessed rapid research progress. The unique advantages of PbTe-based nanowires, such as the large dielectric constant and the existence of a lattice-matched substrate, grant them great potential in overcoming the bottleneck problem of sample defects and impurities and becoming an ideal platform to study MZMs and TQC. In this talk, I will briefly introduce the recent research progress on selective-area molecular beam epitaxy growth and transport characterization of in-plane PbTe nanowires and PbTe-superconductor hybrid nanowires, and discuss the advantages and problems of the new candidate Majorana nanowire system, as well as the prospective of realizing TQC based on it.
Prof. Ke He graduated from Department of Physics, Shandong University in 2000, and received his PhD in 2006 in Institute of Physics, Chinese Academy of Sciences (IOP, CAS). After that, he worked as a postdoc in the University of Tokyo, first in the Department of Physics and then in the Institute of Solid State Physics, for three years in total. From 2009 to 2013, he was an associate professor of IOP, CAS. He joined Department of Physics, Tsinghua University in 2013 and became a full professor since 2016. His research focuses on molecular beam epitaxy growth of low-dimensional topological materials and experimental exploration of topological quantum effects in them. Professor He made important contributions in the first experimental realization of the quantum anomalous Hall effect. He received Nishina Asia Award in 2015, Yeh Chi-Sun Prize in Physics in 2017, and the First-Class National Natural Science Award of China in 2018.
Tencent meeting link: https://meeting.tencent.com/dm/2ypOy6Ao0PMU Meeting ID: 957 504 766, no password
