Tunable Weyl Points in Periodically Driven Nodal Line Semimetals

2016/05/31 by Zhongbo Yan, Zhong Wang · 3 citations
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.quant-gas #cond-mat.str-el #physics.optics

paper · pdf · doi:10.1103/physrevlett.117.087402

published as Phys. Rev. Lett. 117, 087402 (2016) · 6+2 pages, 5 figures

arxiv created 2016/08/18 · arxiv updated 2016/08/19

Abstract

Weyl semimetals and nodal line semimetals are characterized by linear band touching at zero-dimensional points and one-dimensional lines, respectively. We predict that a circularly polarized light drives nodal line semimetals into Weyl semimetals. The Floquet Weyl points thus obtained are tunable by the incident light, which enables investigations of them in a highly controllable manner. The transition from nodal line semimetals to Weyl semimetals is accompanied by the emergence of a large and tunable anomalous Hall conductivity. Our predictions are experimentally testable by transport measurement in film samples or by pump-probe angle-resolved photoemission spectroscopy.

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