Hydrodynamic collective modes in graphene
B. N. Narozhny, I. V. Gornyi, M. Titov
Abstract
Collective behavior is one of the most intriguing aspects of the hydrodynamic approach to electronic transport. Here we provide a consistent, unified calculation of the dispersion relations of the hydrodynamic collective modes in graphene. Taking into account viscous effects, we show that the hydrodynamic sound mode in graphene becomes overdamped at sufficiently large momentum scales. Extending the linearized theory beyond the hydrodynamic regime, we connect the diffusive hydrodynamic charge density fluctuations with plasmons.
Topics & Concepts
GraphenePhysicsMomentum (technical analysis)Charge (physics)Statistical physicsCollective behaviorDispersion (optics)PlasmonDispersion relationClassical mechanicsCondensed matter physicsQuantum mechanicsFinanceSociologyAnthropologyEconomicsPlasmonic and Surface Plasmon ResearchGraphene research and applicationsQuantum and electron transport phenomena