Interfacial thermal transport with strong system-bath coupling: A phonon delocalization effect

Abstract

We study the effect of system-bath coupling strength on quantum thermal transport through the interface of two weakly coupled anharmonic molecular chains using quantum self-consistent phonon approach. The heat current shows a resonant to bi-resonant transition due to the variations in the interfacial coupling and temperature, which is attributed to the delocalization of phonon modes. Delocalization occurs only in the strong system-bath coupling regime and we utilize it to model a thermal rectifier whose ratio can be non-monotonically tuned not only with the intrinsic system parameters but also with the external temperature.

7 pages, 7 figures

References in corpus (16)

• Heat Transport in low-dimensional systems
• Quantum thermal transport in nanostructures
• Finding the quantum thermoelectric with maximal efficiency and minimal entropy production at given power output
• Quantum thermal transport from classical molecular dynamics
• Interfacial thermal transport in atomic junctions
• Nonequilibrium Energy Transfer at Nanoscale: A Unified Theory from Weak to Strong Coupling
• Origin of negative differential thermal resistance in a chain of two weakly coupled nonlinear lattices
• Thermal conductivity of anharmonic lattices: Effective phonons and quantum corrections
• Improved Dyson series expansion for steady-state quantum transport beyond the weak coupling limit - divergences and resolution
• Nonequilibrium spin-boson model: from weak to strong coupling
• Triggering waves in nonlinear lattices: Quest for anharmonic phonons and corresponding mean free paths
• Quantum thermal transport through anharmonic systems: A self-consistent approach
• Nonequilibrium phonon mean free paths in anharmonic chains
• Finite coupling effects in double quantum dots near equilibrium
• Interfacial thermal conduction and negative temperature jump in one-dimensional lattices
• Unifying quantum heat transfer in a nonequilibrium spin-boson model with full counting statistics

Cited by in corpus (6)

• Quantum mechanics of open systems: Dissipaton theories
• Steady state quantum transport through an anharmonic oscillator strongly coupled to two heat reservoirs
• Entangled system-and-environment dynamics: Phase-space dissipaton theory
• Effective-Hamiltonian theory: An approximation to the equilibrium state of open quantum systems
• A statistical quasi-particles thermofield theory with Gaussian environments: System-bath entanglement theorem for nonequilibrium correlation functions
• Photonic heat transport from weak to strong coupling