报告题目: |
Five dimensional generalization of the topological Weyl semimetal |
报告人: |
Biao Lian |
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Stanford University
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报告时间: |
2016-08-30 15:30 |
报告地点: |
Conference Hall 322, Science Building, Tsinghua University |
主办单位: |
高等研究院 |
简介: |
We generalize the concept of three-dimensional topological Weyl semimetal to a class of five
dimensional (5D) gapless solids, where Weyl points are generalized to Weyl surfaces which are
two-dimensional closed manifolds in the momentum space. Each Weyl surface is characterized by
a U(1) second Chern number C2 defined on a four-dimensional manifold enclosing the Weyl
surface, which is equal to its topological linking number with other Weyl surfaces in 5D. In
analogy to the Weyl semimetals, the surface states of the 5D metal take the form of topologically
protected Weyl fermion arcs, which connect the projections of the bulk Weyl surfaces. The further
generalization of topological metal in 2n+1 dimensions carrying the n-thChern number Cn is also
discussed. |
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