Electron energy can oscillate near a crystal dislocation
Name
Li-2017-Electron energy can oscillate near a c.pdf
Size
1.54 MB
Format
Adobe PDF
Checksum (MD5)
01635cb2ad84aa16d7ee90a4154e2165
Author(s)
Li, Mingda
Cui, Wenping
Dresselhaus, Mildred S
Chen, Gang
Date Issued
January 2017
Journal
New Journal of Physics
Publisher
IOP Publishing
Citation
Li, Mingda et al. “Electron Energy Can Oscillate near a Crystal Dislocation.” New Journal of Physics 19.1 (2017): 013033. © 2017 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
Version
Final published version
Abstract
Crystal dislocations govern the plastic mechanical properties of materials but also affect the electrical and optical properties. However, a fundamental and quantitative quantum field theory of a dislocation
has remained undiscovered for decades. Here we present an exactly-solvable one-dimensional quantum field theory of a dislocation, for both edge and screw dislocations in an isotropic medium, by introducing a new quasiparticle which we have called the ‘dislon’. The electron-dislocation relaxation time can then be studied directly from the electron self-energy calculation, which is reducible to classical results. In addition, we predict that the electron energy will experience an oscillation pattern near a dislocation. Compared with the electron density’s Friedel oscillation, such an oscillation is intrinsically different since it exists even with only single electron is present. With our approach, the effect of dislocations on materials’ non-mechanical properties can be studied at a full quantum field theoretical level.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1088/1367-2630/aa5710
