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 NbAs 2 where the spin-orbit coupling (SOC) triggers energy gaps along the nodal lines. These gaps manifest as sharp steps in the optical conductivity spectra σ 1 (ω). This behavior is followed by the linear power-law scaling of σ 1 (ω) at higher frequencies, consistent with our theoretical analysis for dispersive Dirac nodal lines.
Original language | English (US) |
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Pages (from-to) | 1168-1173 |
Number of pages | 6 |
Journal | Proceedings of the National Academy of Sciences of the United States of America |
Volume | 116 |
Issue number | 4 |
DOIs | |
State | Published - Jan 22 2019 |
All Science Journal Classification (ASJC) codes
- General