Extraordinary phonon transmission through hidden lattice-wave nanochannels as resonance quantum phonon tunneling

Kosevich, Yuriy A.; Strelnikov, I. A.

doi:10.1063/5.0011386

Fifth International Conference on Quantum Technologies (Icqt-2019) 2020

DOI: 10.1063/5.0011386

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Extraordinary phonon transmission through hidden lattice-wave nanochannels as resonance quantum phonon tunneling

Yuriy A. Kosevich¹,

I. A. Strelnikov²

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Cited by 2 publications

References 23 publications

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Experimental observation of localized interfacial phonon modes

Cheng

Yan

et al. 2021

Nat Commun

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Interfaces impede heat flow in micro/nanostructured systems. Conventional theories for interfacial thermal transport were derived based on bulk phonon properties of the materials making up the interface without explicitly considering the atomistic interfacial details, which are found critical to correctly describing thermal boundary conductance. Recent theoretical studies predicted the existence of localized phonon modes at the interface which can play an important role in understanding interfacial thermal transport. However, experimental validation is still lacking. Through a combination of Raman spectroscopy and high-energy-resolution electron energy-loss spectroscopy in a scanning transmission electron microscope, we report the experimental observation of localized interfacial phonon modes at ~12 THz at a high-quality epitaxial Si-Ge interface. These modes are further confirmed using molecular dynamics simulations with a high-fidelity neural network interatomic potential, which also yield thermal boundary conductance agreeing well with that measured in time-domain thermoreflectance experiments. Simulations find that the interfacial phonon modes have an obvious contribution to the total thermal boundary conductance. Our findings significantly contribute to the understanding of interfacial thermal transport physics and have impact on engineering thermal boundary conductance at interfaces in applications such as electronics thermal management and thermoelectric energy conversion.

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Experimental observation of localized interfacial phonon modes

Cheng

Yan

et al. 2021

Nat Commun

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Effects of nonlinearity and a new nonlinear resonance in two-path phonon transmittance in lattices with two-dimensional arrays of atomic defects

Koroleva

Kosevich

2023

Phys. Rev. E

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The paper is devoted to analytical and numerical studies of the effects of nonlinearity on the two-path phonon interference in the transmission through two-dimensional arrays of atomic defects embedded in a lattice. The emergence of transmission antiresonance (transmission node) in the two-path system is demonstrated for the few-particle nanostructures, which allow to model both linear and nonlinear phonon transmissioantiresonances. Universality of destructive-interference origin of transmission antiresonances of waves of different nature, such as phonons, photons and electrons, in two-path nanostructures and metamaterials is emphasized. Generation of the higher harmonics in result of the interaction of lattice wave with nonlinear two-path atomic defects is considered, and the full system of nonlinear algebraic equations is obtained to describe the transmission through nonlinear two-path atomic defects with an account for the generation of second and third harmonics. Expressions for the coefficients of lattice energy transmission through and reflection from the embedded nonlinear atomic systems are derived. It is shown that the quartic the interference and nonlinearity in phonon propagation through and scattering in two-dimensional arrays of two-path anharmonic atomic defects with different topology.

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Extraordinary phonon transmission through hidden lattice-wave nanochannels as resonance quantum phonon tunneling

Cited by 2 publications

References 23 publications

Experimental observation of localized interfacial phonon modes

Experimental observation of localized interfacial phonon modes

Effects of nonlinearity and a new nonlinear resonance in two-path phonon transmittance in lattices with two-dimensional arrays of atomic defects

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