Circular Dichroism and Radial Hall Effects in Topological Materials
Date
2018-10-22
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Publisher
Amer Physical Soc
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Abstract
Under symmetry breaking, a three-dimensional nodal-line semimetal can turn into a topological insulator or Weyl semimetal, accompanied by the generation of momentum-space Berry curvature. We develop a theory that unifies their circular dichroism and highlights the roles of Berry curvature distribution and light incident direction. Nontrivially, these phases exhibit distinct dichroic optical absorption and radial Hall effects, with characteristic scalings with photon energy and electric field. Our findings offer a diagnosis tool for examining topological phases of matter.
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Keywords
Semimetals, Molybdenum disulfide, Optical wave guides, Microwaves, Quantum Hall effect
item.page.sponsorship
Singapore Ministry of Education Academic Research Fund Tier 1 (Grant No. SUTD-T1-2015004) and Tier 2 (Grant No. MOE2015-T2-2-144).
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©2018 American Physical Society