Proposer:Zhong FANG
Members: WuMing LIU, Biao WU
Research Field: Theoretical and
Computational Studies for Unconventional Phenomena in Condensed-Matter
Physics
Outline of the research proposal including the following:
We will mostly work on the following three subjects:
(1). Bose-Einstein Condensates (BEC).
(2). Magnetism and Spintronics, Strongly-correlated systems & Orbitronics.
(3). Quantum Simulations Based on Density-Functional-Theory
(1). Bose-Einstein Condensates (BEC).
Bose-Einstein Condensates is a new condensed state. The study in this field will open up a new window to study to the interaction in nature and understand the deep physics behind. It is also very important for the applications. This field is now extensively studied and attracts much attention of physicists.
(2). Magnetism and Spintronics, Strongly-correlated systems & Orbitronics.
There are three important characters of electron: Charge, Spin, and Orbital. Our nowadays electronics mostly based on the charge character of electron, and encounter big basical problems for the future development. Therefore, it is quite interesting and challenging to looking for new electronics, which is fundamentally different with traditional electronics. Two promising fields are the spintronics which use the spin character of electron, and the orbitronics which use the orbital character of electron.
(3). Quantum Simulations Based on Density-Functional-Theory
Quantum simulations and calculations for the physical properties of materials has been regarded as a very important field in the condensed-matter physics. Especially in nowadays, due to the development of computer facilities and calculational method, lots of complicated systems can be treated by simulations. This field is important not only because it can help us to understand the deep physics behind, avoid the waste of budget, but also because it can simulated conditions which is difficult to be reached in reality.
(1). Bose-Einstein Condensates (BEC).
The researches in this field will include the elementary excitation, dynamics of strong correlated Bose systems, spinor Bose-Einstein condensates, quantum phase transition of many body bosonic systems, atomic Bose-Fermi mixtures, and etc.
(2). Magnetism and Spintronics, Strongly-correlated systems & Orbitronics.
For the spintronics part, we will mostly concentrate on the interaction of spin with its solid environment, such as, how to generate spin effectively, how to control the spin and its transport, how to understand the spin relaxation processes, and etc. One special subject is related to the recently proposed spin-Hall effect.
For the orbitronics part, we will concentrate on the orbital degree of freedom. An essential subject, which is responsible for the rich physics in transition-metal oxides, is the orbital degree of freedom and its interplay with the spin, charge, and lattice degrees of freedom. The studies on this subject will help us to understand the deep physics in strongly correlation materials, and possibly contribute the development of real device based on orbital character of electron.
(3). Quantum Simulations Based on Density-Functional-Theory
We will use the first-principles calculations based on density-functional theory to study the physics properties of various systems, including transition-metal oxides, surface and interface, nano-structures, magnetism, transport, and etc.
All the group members have been working on the condensed-matter theory for some years. They all have long term experience of working in famous universities or institutes outside of China, and returned back to work in the Institute of Physics recently. Two of them (W. M. Liu and B. Wu) mostly work on the analytic studies, while Z. FangĄ¯s interests concentrate on computational physics. Z. Fang is author of 34 SCI papers (include 7 PRL and 2 SCINECE papers), W. M. Liu is author of 54 SCI papers (include 3 PRL papers), and B. Wu is author of 18 SCI papers (include 8 PRL papers). We expect that the combination and cooperation of those three members will stimulate the researches for the plan they proposed. An IBM SP690 supercomputer, which has 64 CPUs, has been introduced in 2003. Lots of large-scale calculations and simulations can be done in this computer. In the following part, we list the simple CVs for each of them.