$2\pi$-flux loop semimetals
| Autor: | Stefano Chesi, Shu Chen, Chuanhao Yin, Linhu Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Flux loop
Floquet theory Physics Condensed matter physics Winding number 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Semimetal Loop (topology) Condensed Matter - Strongly Correlated Electrons Quantum mechanics 0103 physical sciences Homogeneous space Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Circular polarization |
| Popis: | We introduce a model of $2\pi$-flux loop semimetals which holds nodal loops described by a winding number $\nu=2$. By adding some extra terms, this model can be transformed into a recently discovered Hopf-link semimetal, and the symmetries distinguishing these two phases are studied. We also propose a simpler physical implementation of $2\pi$-flux loops and of the Hopf-link semimetals which only involves nearest-neighbor hoppings, although in the presence of spin-orbit interaction. Finally, we investigate the Floquet properties of the $2\pi$-flux loop, and find that such a loop may be driven into two separated $\pi$-flux loops or four Weyl points by light with circular polarization in certain directions. Comment: 5 pages, 5 figures |
| Databáze: | OpenAIRE |
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