The Frontier in Condensed Matter Physics (6749)
July 18, 2015 – July 27, 2015
Qikun Xue, Tsinghua University
Hong Ding, Chinese Academy of Sciences
Xinxheng Xie, Peking University
In the current decades, tremendous progress was made in condensed matter physics. In particular, many novel phenomena were observed with the increasing development of experimental technologies and methods, including experimental observation of the quantum anomalous Hall effect (QAHE) in 2013, Majorana fermion measurements, discovery of iron-based superconductors, and new progresses are continuously made in topological insulators and the interface-induced high temperature superconductivity in thin films. A good example is the quantized version of the anomalous Hall effect, which has been predicted to occur in magnetic topological insulators, but the experimental observation of QAHE was not realized until 2013 in thin films of chromium-doped (Bi,Sb)2Te3, a magnetic topological insulator. Another example is the cutting edge research in iron-based superconductors. Since 2006, the iron-based superconductor as a new family of high temperature superconductors after cuprates, has attracted tremendous attention. The highest transition temperature of superconductivity reaches 65 K in single-layer FeSe films. Moreover, a superconducting gap of 20 meV and the magnetic filed induced vortex state suggest that the superconductivity of one unit-cell FeSe films could occur even above 77 K. In addition, several low-dimensional materials, such as graphene and MoS2 have fascinated the scientists by their rich physics and potential applications in next-generation nanoelectronic devices. In combination with doping of electrons or holes, biaxial tensile strain can largely enhance electron-phonon coupling of graphene. While bulk MoS2 exhibits an indirect bandgap, MoS2 monolayer shows a direct bandgap of 1.8 eV, opening new possibilities in the exploration of novel electronic and optoelectronic devices.
The main purpose of this summer school is to introduce the frontier in condensed matter physics, and bridge the gap between the knowledge for graduate students learnt from textbooks and the cutting edge researches in modern condensed matter
physics. It will be hold annually by Tsinghua University, Peking University and Institute of Physics of Chinese Academy of Science alternately, which compose the Collaborative Innovation Center of Quantum Matter. The summer school will be specially designed for senior undergraduate and the first or second year graduate students, who are about to begin or just start their Ph. D. studies in condensed matter physics. We are going to include the following contents in this summer school:
Topological insulator and quantum anomalous Hall effect (QAHE): introduce the topological orders and the topological classifications of the states in condensed matter, and focus on QAHE in theory and realization in experiments;
Iron-based superconductors: introduce the structure, classification, development and urgent problems of iron-based superconductors;
Low-dimensional superconductors: introduce interface superconductivity, low-dimensional conventional superconductors/high temperature superconductors;
Two-dimensional materials: mainly discuss physical properties of graphene, MoS2, MnSe2, etc.
The summer school will be held in Beijing, the capital of China, which has the convenient public transportation networks. Beijing Shunxin Green Resort is in the west of Beijing, which is closed to the beautiful Chaobai River. The distance between Beijing Capital International Airport and Shunxin Green Resort is about 13 km. It has 500-acre forest and can provide a large conference room as the main lecture Hall and enough accommodations. The summer school will accept approximately 100 students, some from the existing and potential ICAM nodes in China, and some from other ICAM branches worldwide. We will try to attract a balanced mix of international students, in order to facilitate good exchange and collaborations among students. All attending students will stay in the Resort (two students sharing one room). The summer school will be last for ten days and the proposed date is from July 19 to July 28, 2015. During the summer school, we plan to arrange two types of talks: (1) tutorial talks, mainly for general audiences, will introduce new concepts of the frontier science to the students; (2) seminar talks focus on the most recent developments. There will be one hour discussion for students after each session.