Qingfeng Sun
Career History Educational experience: July 1995, B.S. in physics, Department of Physics, Peking University July 2000, Ph.D. in physics, Department of Physics, Peking University Professinal experience: 2000-2003, Post-Doctoral Fellow in Department of Physics, McGill University 2003-present, Research Scientist in Institute of Physics, Chinese Academy of Science Awards and Honors: 2002, 100 National Excellent Doctoral Dissertations 2003, The Plan of 100 Outstanding Research Scientists in Chinese Academy of Science 2005, National Outstanding Youth Science Foundation 2005, Awards for New Talents of Science and Technology in Institute of Physics
Research Interests 1. Quantum transport theory in mesoscopic systems; 2. Spointronics; 3. Strongly correlated many-body systems and Kondo effect; 4. Graphene.
Research Experience 1、 Suggested a new type of resonant tunneling process, and revealed that cooper pairs can directly participate in the strongly correlated many-body interactions; Theoretically resolved the problem concerning the measurement of local density of states of the quantum dot (It has been testified experimentally.); Initially studied the influence of spin polarized conducting electrons on Kondo effect.
2、 Designed a setup of spin-battery, which can generate spin-current; discovered that a steady spin-current can induce an electric field around itself, and derived a formula of the electric field for the element of spin-current; predicted that there will be a spin-current even though the system contains only spin-orbital coupling; First put forward a Hamiltonian of second quantized form for the quantum dot system with spin-orbital coupling.
3、Studied the transport properties of Graphene p-n junction, and discover that disorder can greatly enhance the rise of an electronic conductance plateau.
4、Gave reasonable theoretical explanations for nearly all the transient transport properties observed in experiments; put forward the new mechanisms for Andreev reflection between different states, photo-assisted Andreev reflection, etc., in mesoscopic normal-superconducting systems.
Students There are 5 PhD students and 1 posdoc in our group now.
Tel 010-82648018
Email sunqf@aphy.iphy.ac.cn