A strain gradient of 0.112% per nanometre drastically reduces thermal conductivity by 34%, contrasting with the minimal effect of uniform strains. This highlights the critical role of inhomogeneous strains in altering material properties.
Mapping local lattice vibrational spectra reveals phonon peak shifts under strain gradients, intensifying phonon scattering and impeding thermal transport. This distinctive effect challenges conventional understanding and showcases the complexities of nanoscale material dynamics.
#nanoscale-structures #inhomogeneous-strains #thermal-conductivity #lattice-dynamics #material-properties
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