Quantum-Acoustical Drude Peak Shift
Joonas Keski-Rahkonen, Xiao-Yu Ouyang, Shaobing Yuan, Anton M. Graf, Alhun Aydin, Eric J. Heller
Abstract
Quantum acoustics-a recently developed framework parallel to quantum optics-establishes a nonperturbative and coherent treatment of the electron-phonon interaction in real space. The quantum-acoustical representation reveals a displaced Drude peak hiding in plain sight within the venerable Fröhlich model: the optical conductivity exhibits a finite frequency maximum in the far-infrared range and the dc conductivity is suppressed. Our results elucidate the origin of the high-temperature absorption peaks in strange or bad metals, revealing that dynamical lattice disorder steers the system towards a non-Drude behavior.
Topics & Concepts
Drude modelQuantumPhysicsPhononOptical conductivityCondensed matter physicsLattice (music)ElectronConductivityQuantum mechanicsAcousticsQuantum, superfluid, helium dynamicsQuantum and electron transport phenomenaMechanical and Optical Resonators