Phonon localization in heat conduction

被引：151

作者：

Luckyanova, M. N. ^{[1
]}

Mendoza, J. ^{[1
]}

Lu, H. ^{[2
,10
]}

Song, B. ^{[1
]}

Huang, S. ^{[3
,11
]}

Zhou, J. ^{[1
]}

Li, M. ^{[1
,12
]}

Dong, Y. ^{[4
,5
]}

Zhou, H. ^{[4
]}

Garlow, J. ^{[6
,13
]}

Wu, L. ^{[6
]}

Kirby, B. J. ^{[7
]}

Grutter, A. J. ^{[7
]}

Puretzky, A. A. ^{[8
]}

Zhu, Y. ^{[6
]}

Dresselhaus, M. S. ^{[9
]}

Gossard, A. ^{[2
]}

Chen, G. ^{[1
]}

机构：

[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[3] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[4] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[5] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China

[6] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[7] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[8] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[9] MIT, Dept Phys, Cambridge, MA 02139 USA

[10] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China

[11] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA

[12] MIT, Dept Nucl Sci & Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[13] SUNY Stony Brook, Dept Mat Sci & Chem Engn, Stony Brook, NY 11794 USA

来源：

SCIENCE ADVANCES | 2018年 / 4卷 / 12期

关键词：

THERMAL-CONDUCTIVITY; THERMOELECTRIC PERFORMANCE; NANOSCALE; TRANSPORT; BULK;

D O I：

10.1126/sciadv.aat9460

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nondiffusive phonon thermal transport, extensively observed in nanostructures, has largely been attributed to classical size effects, ignoring the wave nature of phonons. We report localization behavior in phonon heat conduction due to multiple scattering and interference events of broadband phonons, by measuring the thermal conductivities of GaAs/AlAs superlattices with ErAs nanodots randomly distributed at the interfaces. With an increasing number of superlattice periods, the measured thermal conductivities near room temperature increased and eventually saturated, indicating a transition from ballistic to diffusive transport. In contrast, at cryogenic temperatures the thermal conductivities first increased but then decreased, signaling phonon wave localization, as supported by atomistic Green's function simulations. The discovery of phonon localization suggests a new path forward for engineering phonon thermal transport.

引用

页数：10

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