2021/06/09 by James Jun He, Naoto Nagaosa
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electronic and Structural Properties of Oxides #MAJORANA #Physics #Quantum mechanics #Quantum spin liquid #Raman scattering #Raman spectroscopy #Scattering #Spectroscopy #Spin (aerodynamics) #Spin polarization #Superconductivity #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.103.l241109
arxiv created 2021/06/09 · openalex publication_date 2021/06/17 · arxiv updated 2021/06/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Raman scattering with local optical excitation from the Majorana edge modes of Kitaev spin liquids and topological superconductors is studied theoretically. Although the effective one-dimensional model is common between these two cases, the coupling to the electromagnetic field is different. It is found that the Raman spectrum at low energy scales with \ensuremathω3 in Kitaev spin liquids while it shows the gap in topological superconductors. This is in sharp contrast to the infrared absorption, where the spectrum shows the gap in Kitaev spin liquids, while it behaves as \ensuremath∼\ensuremathω2 in topological superconductors. This indicates that the electrodynamics of Majorana edge modes depends on their higher-dimensional origins. A realistic estimate of the Raman scattering intensity is given for \ensuremathα\text\ensuremath-RuCl3 as a candidate for a Kitaev spin liquid.