2015/07/18 by Junya Shibata, Akihito Takeuchi, Hiroshi Kohno +1 · 12 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Dielectric #Electric field #Ferroelectricity #Hamiltonian (control theory) #Magnetoelectric effect #Materials science #Metamaterial #Multiferroics #Multiferroics and related materials #Physics #Quantum and electron transport phenomena #Quantum mechanics #Topological Materials and Phenomena #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.7566/jpsj.85.033701
published in Journal of the Physical Society of Japan 85(3), 033701 (Physical Society of Japan) · 30 pages, 3 figures
arxiv created 2015/07/18 · openalex publication_date 2016/02/04 · arxiv updated 2016/02/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Rashba interaction induced when inversion symmetry is broken in solids is a key interaction connecting spin and charge for realizing novel magnetoelectric cross-correlation effects. Here, we theoretically explore the optical properties of a bulk Rashba conductor by calculating the transport coefficients at finite frequencies. It is demonstrated that the combination of direct and inverse Edelstein effects leads to a softening of the plasma frequency for the electric field perpendicular to the Rashba field, resulting in a hyperbolic electromagnetic metamaterial. In the presence of magnetization, a significant enhancement of anisotropic propagation (directional dichroism) is predicted because of interband transition edge singularity.Based on an effective Hamiltonian analysis, the dichroism is demonstrated to be driven by toroidal and quadratic moments of the magnetic Rashba system. The effective theory of the cross-correlation effects has the same mathematical structure as that of insulating multiferroics.