Electron energy can oscillate near a crystal dislocation

Li, Mingda; Cui, Wenping; Dresselhaus, Mildred S.; Chen, Gang

doi:10.1088/1367-2630/aa5710

Title: Electron energy can oscillate near a crystal dislocation

Journal Article · Sun Jan 01 00:00:00 EST 2017 · New Journal of Physics

DOI:https://doi.org/10.1088/1367-2630/aa5710· OSTI ID:1341259

Li, Mingda; Cui, Wenping; Dresselhaus, Mildred S.; Chen, Gang

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 in this article 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.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Defense Advanced Research Projects Agency (DARPA)

Grant/Contract Number:: SC0001299; FG02-09ER46577

OSTI ID:: 1341259

Alternate ID(s):: OSTI ID: 1341260; OSTI ID: 1366537

Journal Information:: New Journal of Physics, Journal Name: New Journal of Physics Vol. 19 Journal Issue: 1; ISSN 1367-2630

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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