Crossover from exciton polarons to trions in doped two-dimensional semiconductors at finite temperature
Antonio Tiene, Brendan C. Mulkerin, Jesper Levinsen, Meera M. Parish, F. M. Marchetti
Abstract
Should the optical response of doped two-dimensional semiconductors be described within a Fermi polaron or a trion model? Using a finite-temperature Fermi polaron theory, the authors demonstrate here a crossover from a quantum degenerate regime with a well-defined polaron quasiparticle to an incoherent regime at high temperature or low doping, where the lowest-energy attractive polaron becomes subsumed into a broad trion-hole continuum. The crossover is accompanied by a characteristic evolution of the emission profile, from a symmetric Lorentzian to an asymmetric peak.
Topics & Concepts
PolaronTrionCondensed matter physicsQuasiparticlePhysicsCrossoverExcitonDopingDegenerate energy levelsSemiconductorDegenerate semiconductorQuantum mechanicsElectronSuperconductivityComputer scienceArtificial intelligenceQuantum and electron transport phenomenaPhysics of Superconductivity and MagnetismStrong Light-Matter Interactions