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Topological Invariants of Metals and the Related Physical Effects.
- Source :
- Chinese Physics Letters; Feb2013, Vol. 30 Issue 2, p1-4, 4p
- Publication Year :
- 2013
-
Abstract
- The total reciprocal space magnetic flux threading through a closed Fermi surface is a topological invariant for a three-dimensional metal. For a Weyl metal, the invariant is nonzero for each of its Fermi surfaces. We show that such an invariant can be related to the magneto-valley-transport effect, in which an external magnetic field can induce a valley current. We further show that a strain field can drive an electric current, and that the effect is dictated by a second-class Chern invariant. These connections open the pathway to observe the hidden topological invariants in metallic systems. [ABSTRACT FROM AUTHOR]
- Subjects :
- METALS
MAGNETIC flux
FERMI surfaces
ELECTRIC currents
TOPOLOGY
Subjects
Details
- Language :
- English
- ISSN :
- 0256307X
- Volume :
- 30
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Chinese Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 86671317
- Full Text :
- https://doi.org/10.1088/0256-307X/30/2/027101