Rules of Connectivity-Dependent Phonon Interference in Molecular Junctions.

ABSTRACT: Controlling nanoscale heat flow is crucial for advanced electronics. Phonons, the primary heat carriers in molecules, exhibit wave-like behavior and can interfere, leading to phonon interference (PI). This study reveals that PI in molecular junctions connected to gold electrodes through different contact points deviates significantly from electron quantum interference (QI). Contrary to QI, meta-connected benzenedithiol (BDT), oligophenylene ethynylene (OPE3), bis(phenylethynyl)naphthalene, and bis(phenylethynyl)anthracene junctions can exhibit higher thermal conductance than para-connected ones. This arises from multiple phonon transmission channels and long-range interatomic interactions, both absent in electronic systems. Single-channel phonon transport shows an inverted in

SUBMITTER: Zheng L 

PROVIDER: S-EPMC12023023 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature