title: Nonperturbative Quantum Nature of the Dislocation-Phonon Interaction.
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.
authors.affiliation: Department of Mechanical Engineering, MIT , Cambridge, Massachusetts 02139, United States.
authors.forename: Mingda
authors.identifier: 0000-0002-7055-6368
authors.initials: M
authors.lastname: Li
authors.affiliation: Department of Mechanical Engineering, MIT , Cambridge, Massachusetts 02139, United States.
authors.forename: Zhiwei
authors.identifier: 0000-0002-2612-7750
authors.initials: Z
authors.lastname: Ding
authors.affiliation: Condensed Matter Physics and Material Sciences Department, Brookhaven National Laboratory , Upton, New York 11973, United States.
authors.forename: Qingping
authors.initials: Q
authors.lastname: Meng
authors.affiliation: Department of Mechanical Engineering, MIT , Cambridge, Massachusetts 02139, United States.
authors.forename: Jiawei
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Condensed Matter Physics and Material Sciences Department, Brookhaven National Laboratory , Upton, New York 11973, United States.
authors.forename: Yimei
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Physics, MIT , Cambridge, Massachusetts 02139, United States.
authors.forename: Hong
authors.initials: H
authors.lastname: Liu
authors.affiliation: Department of Physics, MIT , Cambridge, Massachusetts 02139, United States.|Department of Electrical Engineering and Computer Sciences, MIT , Cambridge, Massachusetts 02139, United States.
authors.forename: M S
authors.initials: MS
authors.lastname: Dresselhaus
authors.affiliation: Department of Mechanical Engineering, MIT , Cambridge, Massachusetts 02139, United States.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
keywords: Dislocations; dislocation−phonon interaction; effective field theory; phonon transport; renormalization; thermal conductivity