Localized polarons and doorway vibrons in finite quantum structures

Abstract

We consider transport through finite quantum systems such as quantum barriers, wells, dots or junctions, coupled to local vibrational modes in the quantal regime. As a generic model we study the Holstein-Hubbard Hamiltonian with site-dependent potentials and interactions. Depending on the barrier height to electron-phonon coupling strength ratio and the phonon frequency we find distinct opposed behaviors: Vibration-mediated tunneling or intrinsic localization of (bi)polarons. These regimes are strongly manifested in the density correlations, mobility, and optical response calculated by exact numerical techniques.

corrected Figs 5 and 6, updated references

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Cited by in corpus (13)

• Numerical approaches to time evolution of complex quantum systems
• Non-equilibrium transport through molecular junctions in the quantum regime
• Spatiotemporal evolution of polaronic states in finite quantum systems
• Polaronic memristor strongly coupled to electrodes
• Phonon affected transport through molecular quantum dots
• Transport through a vibrating quantum dot: Polaronic effects
• Topological insulators in random potentials
• Phonon-affected steady-state transport through molecular quantum dots
• Transport properties of a molecular quantum dot coupled to one-dimensional correlated electrons
• Polaron Mass and Electron-Phonon Correlations in the Holstein Model
• Ground-state properties of the two-site Hubbard-Holstein model: an exact solution
• Coherent Electron Transfer in Polyacetylene
• Heating and thermoelectric transport in a molecular junction