Magnetophonons & type-B Goldstones from hydrodynamics to holography

Journal of High Energy Physics

Li Li¹  Matteo Baggioli²  Sebastian Grieninger³ 

[1] CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences;Instituto de Fisica Teorica UAM/CSIC;Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena;

关键词: Holography and condensed matter physics (AdS/CMT);    Space-Time Symmetries;    AdS-CFT Correspondence;    Effective Field Theories;   

DOI  :  10.1007/JHEP09(2020)037

来源: DOAJ

【 摘 要 】

Abstract We perform a detailed analysis of a large class of effective holographic models with broken translations at finite charge density and magnetic field. We exhaustively discuss the dispersion relations of the hydrodynamic modes at zero magnetic field and successfully match them to the predictions from charged hydrodynamics. At finite magnetic field, we identify the presence of an expected type-B Goldstone boson Re[ω] ∼ k 2, known as magnetophonon and its gapped partner — the magnetoplasmon. We discuss their properties in relation to the effective field theory and hydrodynamics expectations. Finally, we compute the optical conductivities and the quasinormal modes at finite magnetic field. We observe that the pinning frequency of the magneto-resonance peak increases with the magnetic field, in agreement with experimental data on certain 2D materials, revealing the quantum nature of the holographic pinning mechanism.

【 授权许可】

Unknown