Shot noise in magnetic tunneling structures with two-level quantum dots
We analyze shot noise in a magnetic tunnel junction with a two-level quantum dot attached to the magnetic electrodes. The considerations are limited to the case when some transport channels are suppressed at low temperatures. Coupling of the two dot's levels to the electrodes are assumed to be...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/109987 |
| _version_ | 1826204832515489792 |
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| author | Szczepański, T. Dugaev, V. K. Barnaś, J. Martinez, I. Hong, J.-Y. Lin, M.-T. Aliev, F. G. Cascales Sandoval, Juan Pedro |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Szczepański, T. Dugaev, V. K. Barnaś, J. Martinez, I. Hong, J.-Y. Lin, M.-T. Aliev, F. G. Cascales Sandoval, Juan Pedro |
| author_sort | Szczepański, T. |
| collection | MIT |
| description | We analyze shot noise in a magnetic tunnel junction with a two-level quantum dot attached to the magnetic electrodes. The considerations are limited to the case when some transport channels are suppressed at low temperatures. Coupling of the two dot's levels to the electrodes are assumed to be generally different and also spin dependent. To calculate the shot noise we apply the approach based on the full counting statistics. The approach is used to account for experimental data obtained in magnetic tunnel junctions with organic barriers. The experimentally observed Fano factors correspond to the super-Poissonian statistics, and also depend on relative orientation of the electrodes' magnetic moments. We have also calculated the corresponding spin shot noise, which is associated with fluctuations of spin current. |
| first_indexed | 2024-09-23T13:02:06Z |
| format | Article |
| id | mit-1721.1/109987 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:02:06Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1099872022-09-28T11:38:30Z Shot noise in magnetic tunneling structures with two-level quantum dots Szczepański, T. Dugaev, V. K. Barnaś, J. Martinez, I. Hong, J.-Y. Lin, M.-T. Aliev, F. G. Cascales Sandoval, Juan Pedro Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Plasma Science and Fusion Center Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Cascales Sandoval, Juan Pedro We analyze shot noise in a magnetic tunnel junction with a two-level quantum dot attached to the magnetic electrodes. The considerations are limited to the case when some transport channels are suppressed at low temperatures. Coupling of the two dot's levels to the electrodes are assumed to be generally different and also spin dependent. To calculate the shot noise we apply the approach based on the full counting statistics. The approach is used to account for experimental data obtained in magnetic tunnel junctions with organic barriers. The experimentally observed Fano factors correspond to the super-Poissonian statistics, and also depend on relative orientation of the electrodes' magnetic moments. We have also calculated the corresponding spin shot noise, which is associated with fluctuations of spin current. 2017-06-16T20:49:35Z 2017-06-16T20:49:35Z 2016-12 2016-12 2016-12-22T23:00:03Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/109987 Szczepański, T. et al. “Shot Noise in Magnetic Tunneling Structures with Two-Level Quantum Dots.” Physical Review B 94.23 (2016): n. pag. © 2016 American Physical Society en http://dx.doi.org/10.1103/PhysRevB.94.235429 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Szczepański, T. Dugaev, V. K. Barnaś, J. Martinez, I. Hong, J.-Y. Lin, M.-T. Aliev, F. G. Cascales Sandoval, Juan Pedro Shot noise in magnetic tunneling structures with two-level quantum dots |
| title | Shot noise in magnetic tunneling structures with two-level quantum dots |
| title_full | Shot noise in magnetic tunneling structures with two-level quantum dots |
| title_fullStr | Shot noise in magnetic tunneling structures with two-level quantum dots |
| title_full_unstemmed | Shot noise in magnetic tunneling structures with two-level quantum dots |
| title_short | Shot noise in magnetic tunneling structures with two-level quantum dots |
| title_sort | shot noise in magnetic tunneling structures with two level quantum dots |
| url | http://hdl.handle.net/1721.1/109987 |
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