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Electrodynamics on Fermi Cyclides in Nodal Line Semimetals.
Seongjin Ahn1, E J Mele2, Hongki Min1,2
1Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea.
Physical Review Letters
|October 21, 2017
Summary
We reveal scaling rules for the conductivity of nodal line semimetals. These rules, based on Fermi surface geometry, explain the rich spectral structure observed in low-frequency conductivity measurements.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Nodal line semimetals (NLSMs) exhibit unique electronic properties due to their band structure.
- Understanding their frequency-dependent conductivity is crucial for electronic applications.
Purpose of the Study:
- To investigate the frequency-dependent conductivity of NLSMs.
- To explore the influence of carrier density and energy dispersion on conductivity.
- To establish scaling rules for optical conductivity based on Fermi surface geometry.
Main Methods:
- Development of a low-energy model for generic NLSMs.
- Numerical calculations of interband and intraband conductivity contributions.
- Analysis of conductivity across different frequency regimes.
Main Results:
- Identified a rich spectral structure in low-frequency conductivity.
- Derived scaling rules for optical conductivity based on Dupin cyclide Fermi surface geometry.
- Demonstrated the validity of these scaling rules through numerical simulations.
Conclusions:
- The frequency-dependent conductivity of NLSMs exhibits universal scaling behavior.
- Fermi surface geometry dictates the spectral features of conductivity.
- The findings provide a theoretical framework for understanding and predicting NLSM conductivity.
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