Phonon localization in heat conduction

Luckyanova, Maria N.; Mendoza, Jonathan; Lü, Hong; Song, Bai; Huang, Shengxi; Zhou, Jiawei; Li, Mingda; Dong, Yuan; Zhou, Hua; Garlow, Joseph A.; Wu, Lijun; Kirby, Brian J.; Grutter, Alexander J.; Puretzky, Alexander A.; Zhu, Yimei; Dresselhaus, M. S.; Gossard, A. C.; Chen, G.

doi:10.1126/sciadv.aat9460

Cited by 125 publications

(93 citation statements)

References 59 publications

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“…1(d) we show that while the thermal conductivity systematically decreases with increasing aperiodicity, the maximum is observed even in the presence of moderate disorder at D ¼ 2-3. Indeed, such emergence of a thermal conductivity maximum was recently discovered experimentally [19] and through a Green's function based elastic model [20] at cryogenic temperatures in GaAs=AlAs superlattices with interfacially incorporated ErAs nanoparticles. Here, however, we demonstrate the effect in purely binary layered systems.…”

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confidence: 92%

“…The phenomenon has been attributed to Anderson localization [18], originating from the destructive interference of coherent phonons and consequently quenching wave transport under structural disorder. Indeed, recent experiments [19] and numerical studies [20] on nanoparticle embedded SLs have shown evidence of Anderson localization of thermal phonons at low temperatures. However, to this end, no studies have been carried out to explicitly elucidate the spectral features of phonon localization in aperiodic SLs under anharmonic interactions.…”

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confidence: 99%

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Anderson Localization Quenches Thermal Transport in Aperiodic Superlattices

2019

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We show that aperiodic superlattices exhibit intriguing interplay between phononic coherent wave interference effects and incoherent transport. In particular, broadband Anderson localization results in a drastic thermal conductivity reduction of 98% at room temperature, providing an ultralow value of 1.3 W m −1 K −1 , and further yields an anomalously large thermal anisotropy ratio of ∼10 2 in aperiodic Si=Ge superlattices. A maximum in the thermal conductivity emerges as an unambiguous consequence of phonon Anderson localization at a system length scale bridging the extended and localized transport regimes. The frequency-resolved picture, combined with our lattice dynamical description of Anderson localization, elucidates the rich transport characteristics in these systems and the potential of correlated disorder for sub-to few-THz phononic engineering of heat transport in thermoelectric applications.

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confidence: 92%

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confidence: 99%

Anderson Localization Quenches Thermal Transport in Aperiodic Superlattices

2019

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“…Refs. [56][57][58] ). But here "impurities concentration" is equal to 1, providing spectrum corrections of the order of the pure spectrum (40) in the whole Brillouin zone (see Fig.…”

Section: Resultsmentioning

confidence: 99%

Substrate-induced reduction of graphene thermal conductivity

et al. 2017

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We develop the theory of heat conductivity in supported graphene, accounting for coherent phonon scattering on disorder induced by an amorphous substrate. We derive spectra for in-plane and outof-plane phonons in the framework of Green's function approach. The energetic parameters of the theory are obtained using the molecular dynamics simulations for graphene on SiO2 substrate. The heat conductivity is calculated by the Boltzmann transport equation. We find that the interaction with the substrate drastically reduces the phonon lifetime and completely suppresses the contribution of ZA phonons to the heat conductivity. As a result, the total heat conductivity is reduced by several times, which matches with the tendency observed for available experimental data. The considered effect is important for managing thermal properties of the graphene-based electronic devices.

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“…10 Similar to this report, studies about disordered surfaces have been gradually emerging. 11 Recently, the eld of engineering, which was inspired by the characteristic features of living organisms, has attracted many researchers. [12][13][14] There are functional surface structures in nature, which can possess various heat transfer properties.…”

Section: Introductionmentioning

confidence: 99%