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arXiv · 1605.05017

The Non-Perturbative Quantum Nature of the Dislocation-Phonon Interaction

Mingda Li·Zhiwei Ding·Qingping Meng·Jiawei Zhou·Yimei Zhu·Hong Liu·Mildred S. Dresselhaus·Gang Chen
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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 the nature of dislocation-phonon resonance. Here by introducing a fully quantized dislocation field, the "dislon"[1], a phonon is renormalized as a quasi-phonon, with shifted quasi-phonon energy, and accompanied by a finite quasi-phonon lifetime that is reducible to classical results. A series of outstanding legacy issues including those above can be directly explained within this unified phonon renormalization approach. In particular, a renormalized phonon naturally resolves the decades-long debate between dynamic and static dislocation-phonon scattering approaches.

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Mingda Li, Zhiwei Ding, Qingping Meng, Jiawei Zhou, Yimei Zhu, Hong Liu, Mildred S. Dresselhaus, Gang Chen. 2016-05-17. The Non-Perturbative Quantum Nature of the Dislocation-Phonon Interaction. https://doi.org/10.1021/acs.nanolett.6b04756

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