期刊
PHYSICAL REVIEW B
卷 101, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.101.165402
关键词
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资金
- Deutsche Forschungsgemeinschaft through project A04 of Collaborative Research Center [SFB 1143]
- Deutsche Forschungsgemeinschaft through Cluster Excellence on Complexity and Topology in Quantum Matter (ct.qmat) [EXC 2147]
Weyl semimetals exhibit exotic Fermi-arc surface states, which strongly affect their electromagnetic properties. We derive analytical expressions for all components of the composite density-spin response tensor for the surfaces states of a Weyl-semimetal model obtained by closing the band gap in a topological insulating state and introducing a time-reversal-symmetry-breaking term. Based on the results, we discuss the electromagnetic susceptibilities, the current response, and other physical effects arising from the density-spin response. We find a magnetoelectric effect caused solely by the Fermi arcs. We also discuss the effect of electron-electron interactions within the random phase approximation and investigate the dispersion of surface plasmons formed by Fermi-arc states. Our work is useful for understanding the electromagnetic and optical properties of the Fermi arcs.
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