Nonperturbative Quantum Nature of the Dislocation–Phonon Interaction
Name
1605.05017.pdf
Size
5.04 MB
Format
Adobe PDF
Checksum (MD5)
ddbcffe26fee7358ebd84b916ad91d81
Author(s)
Meng, Qingping
Zhu, Yimei
Li, Mingda
Ding, Zhiwei
Zhou, Jiawei
Liu, Hong
Dresselhaus, Mildred
Chen, Gang
Alternative Title
Nonperturbative Quantum Nature of the Dislocation–Phonon Interaction
Date Issued
March 2017
Journal
Nano Letters
Publisher
American Chemical Society (ACS)
Citation
Li, Mingda et al. “Nonperturbative Quantum Nature of the Dislocation–Phonon Interaction.” Nano Letters 17, 3 (February 2017): 1587–1594 © 2017 American Chemical Society
Version
Original manuscript
Abstract
Despite the long history of dislocation-phonon interaction studies, there are many problems that have not been fully resolved during this development. These include an incompatibility between a perturbative approach and the long-range nature of a dislocation, the relation between static and dynamic scattering, and their capability of dealing with thermal transport phenomena for bulk material only. Here by utilizing a fully quantized dislocation field, which we called a “dislon”, a phonon interacting with a dislocation is renormalized as a quasi-phonon, with shifted quasi-phonon energy, and accompanied by a finite quasi-phonon lifetime, which are reducible to classical results. A series of outstanding legacy issues including those above can be directly explained within this unified phonon renormalization approach. For instance, a renormalized phonon naturally resolves the decade-long debate between dynamic and static dislocation-phonon scattering approaches, as two limiting cases. In particular, at nanoscale, both the dynamic and static approaches break down, while the present renormalization approach remains valid by capturing the size effect, showing good agreement with lattice dynamics simulations. Keywords: Dislocations; dislocation−phonon interaction; effective field theory; phonon transport; renormalization; thermal conductivity
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/ACS.NANOLETT.6B04756
