Topological Insulators and Superconductors (August 18-21,2011 Beijing)  
             
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LT26 BEIJING

 


 
       
       
       
 

Topological insulators are new states of quantum matter with profound physical properties which have their origin in topology. They have a bulk insulating gap, however, they are distinct from ordinary insulators in that they have stable gapless edge states. The quantum Hall system, which is an insulator without any kind of spontaneous symmetry breaking, is the first example of topological insulators. The Hall conductance is so precisely quantized that it has become the standard of resistance. Surprisingly, this remarkable quantization can be described by the elegant mathematical framework of topology.

More recently, the time reversal invariant topological insulators have been theoretically predicted and experimentally observed in HgTe, BiSb, Bi2Te3 and Bi2Se3 materials. Unlike the quantum Hall system, these new kinds of topological insulators do not require strong magnetic fields and are therefore much more experimentally accessible. The first example of these time reversal invariant topological insulators is the quantum spin Hall system in HgTe quantum wells, which is also called the two dimensional topological insulator. Since its theoretical prediction and experimental discovery, this research area has been blooming. The quantum spin Hall system has a bulk gap, however, its gapless edge states are protected by time reversal symmetry. Later, its three dimensional generalizations are discovered, which furthermore stimulates the research of this area.

Topological superconductors are the analogs of topological insulators in the sense that they have a bulk pairing gap for fermions, and gapless surface states. These gapless surface states have their origin also in topology.  The examples of topological superconductors include the familiar helium three B phase, and p+ip paired superconductors.

Topological insulators and superconductors have profoundly deepened our understanding of quantum matter. Meanwhile, research is this field can also be of fundamental technological importance to practical world. The prospect of dissipationless quantum transport of spin in the absence of strong magnetic field might provide a new platform for information processing.

This satellite conference of the LT26 conference will focus on recent experimental and theoretical progress in the field of topological insulators and superconductors. The conference organizers are Carlo Beenakker (Leiden), Xi Chen (Tsinghua University), Xi Dai (IOP, China), Aharon Kapitulnik (Stanford), Qikun Xue (Tsinghua) and Shou-Cheng Zhang(Stanford/Tsinghua). The conference will take place on the campus of Tsinghua University in Beijing..

The list of invited speakers and other information of the conference will be continuously updated on this website. Travel and hotel information are also available on this website. For registration, please send e-mail to Lily Li at castu03@mail.tsinghua.edu.cn with your name, occupation, institution, and contact information.

For inquiries about the conference, please contact Xi Dai ( daix@aphy.iphy.ac.cn ) or Xi Chen( xc@tsinghua.edu.cn )