Optical signatures of Dirac nodal lines in NbAs2.
Proc Natl Acad Sci U S A
; 116(4): 1168-1173, 2019 01 22.
Article
en En
| MEDLINE
| ID: mdl-30559211
ABSTRACT
Using polarized optical and magneto-optical spectroscopy, we have demonstrated universal aspects of electrodynamics associated with Dirac nodal lines that are found in several classes of unconventional intermetallic compounds. We investigated anisotropic electrodynamics of [Formula see text] where the spin-orbit coupling (SOC) triggers energy gaps along the nodal lines. These gaps manifest as sharp steps in the optical conductivity spectra [Formula see text] This behavior is followed by the linear power-law scaling of [Formula see text] at higher frequencies, consistent with our theoretical analysis for dispersive Dirac nodal lines. Magneto-optics data affirm the dominant role of nodal lines in the electrodynamics of [Formula see text].
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01-internacional
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MEDLINE
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En
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Proc Natl Acad Sci U S A
Año:
2019
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Article