Electron energy can oscillate near a crystal dislocation
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 q...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/aa5710 |
| _version_ | 1797750875676999680 |
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| author | Mingda Li Wenping Cui Mildred S Dresselhaus Gang Chen |
| author_facet | Mingda Li Wenping Cui Mildred S Dresselhaus Gang Chen |
| author_sort | Mingda Li |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T16:40:12Z |
| format | Article |
| id | doaj.art-1c705856bec347d5810f189d00cbc494 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:40:12Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-1c705856bec347d5810f189d00cbc4942023-08-08T14:33:43ZengIOP PublishingNew Journal of Physics1367-26302017-01-0119101303310.1088/1367-2630/aa5710Electron energy can oscillate near a crystal dislocationMingda Li0Wenping Cui1Mildred S Dresselhaus2Gang Chen3Department of Mechanical Engineering, MIT, Cambridge, MA 02139, United StatesDepartment of Physics, Boston College, Chestnut Hill, MA 02467, United States; Department of Physics, Boston University, Boston, MA 02215, United StatesDepartment of Physics and Department of Electrical Engineering and Computer Sciences, MIT, MA 02139, United StatesDepartment of Mechanical Engineering, MIT, Cambridge, MA 02139, United StatesCrystal 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.https://doi.org/10.1088/1367-2630/aa5710quantum field theorycrystal dislocationFriedel oscillationdisordered system03.70.+k61.72.Lk |
| spellingShingle | Mingda Li Wenping Cui Mildred S Dresselhaus Gang Chen Electron energy can oscillate near a crystal dislocation New Journal of Physics quantum field theory crystal dislocation Friedel oscillation disordered system 03.70.+k 61.72.Lk |
| title | Electron energy can oscillate near a crystal dislocation |
| title_full | Electron energy can oscillate near a crystal dislocation |
| title_fullStr | Electron energy can oscillate near a crystal dislocation |
| title_full_unstemmed | Electron energy can oscillate near a crystal dislocation |
| title_short | Electron energy can oscillate near a crystal dislocation |
| title_sort | electron energy can oscillate near a crystal dislocation |
| topic | quantum field theory crystal dislocation Friedel oscillation disordered system 03.70.+k 61.72.Lk |
| url | https://doi.org/10.1088/1367-2630/aa5710 |
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