Transient localization from the interaction with quantum bosons

Abstract

We carefully revisit the electron-boson scattering problem, going beyond popular semi-classical treatments. By providing numerically exact results valid at finite temperatures, we demonstrate the existence of a regime of electron-boson scattering where quantum localization processes become relevant despite the absence of extrinsic disorder. Localization in the Anderson sense is caused by the emergent randomness resulting from a large thermal boson population, being effective at transient times before diffusion can set in. Compelling evidence of this transient localization phenomenon is provided by the observation of a distinctive displaced Drude peak (DDP) in the optical absorption and the ensuing suppression of conductivity. Our findings identify a general route for anomalous metallic behavior that can broadly apply in interacting quantum matter.

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• Intriguing Low-Temperature Phase in the Antiferromagnetic Kagome Metal FeGe
• First-principle quantum Monte-Carlo study of charge carrier mobility in organic molecular semiconductors
• Precursors to Anderson Localization in the Holstein Model: Quantum and Quantum-Classical Solutions
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• Interplay of $d$- and $p$-states in RbTi${}_3$Bi${}_5$ and CsTi${}_3$Bi${}_5$ flat-band kagome metals
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• Beyond-quasiparticle transport with vertex correction: self-consistent ladder formalism for electron-phonon interactions
• Analytical expression for $\pi$-ton vertex contributions to the optical conductivity
• Charge-localization-driven metal-insulator phase transition in layered molecular conductors