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Tunable interface states between semimetals
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DOI：10.1103/PhysRevB.106.195115.png)
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Weyl semimetals and nodal line semimetals are characterized by linear electronic bands touching at zero -dimensional points and one-dimensional lines, respectively. Recently, it has been predicted that nodal line semimetals can be driven into tunable Floquet-Weyl semimetals by circularly polarized light. Here we study the occurrence of interface states between two regions of a nodal line semimetal illuminated by two beams of light with opposite circular polarizations. Within a minimal model we find remarkable modifications of the energy structure by tuning the polarized light, such as the possible generation of Van Hove singularities. Moreover, by adding a delta doping of magnetic impurities along the interfacial plane, we show the occurrence of a switchable and topologically nontrivial, vortexlike pseudospin pattern of the interface states.
Keyword:
VAN-HOVE SINGULARITIES
TOPOLOGICAL INSULATOR
FLOQUET-BLOCH
MECHANISM
SUPERCONDUCTIVITY
DISCOVERY
FERMIONS
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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