Spin polarization induced by decoherence in a tunneling one-dimensional Rashba model
Basic questions on the nature of spin polarization in two terminal systems and the way in which decoherence breaks Time-Reversal Symmetry (TRS) are analyzed. We exactly solve several one-dimensional models of tunneling electrons and show the interplay of spin precession and decay of the wavefunction...
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| Format: | Article |
| Language: | English |
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SciPost
2023-06-01
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| Series: | SciPost Physics Core |
| Online Access: | https://scipost.org/SciPostPhysCore.6.2.044 |
| _version_ | 1797800285200973824 |
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| author | Solmar Varela, Mayra Peralta, Vladimiro Mujica, Bertrand Berche, Ernesto Medina |
| author_facet | Solmar Varela, Mayra Peralta, Vladimiro Mujica, Bertrand Berche, Ernesto Medina |
| author_sort | Solmar Varela, Mayra Peralta, Vladimiro Mujica, Bertrand Berche, Ernesto Medina |
| collection | DOAJ |
| description | Basic questions on the nature of spin polarization in two terminal systems and the way in which decoherence breaks Time-Reversal Symmetry (TRS) are analyzed. We exactly solve several one-dimensional models of tunneling electrons and show the interplay of spin precession and decay of the wavefunction in either a $U(1)$ magnetic field or an effective Spin-Orbit (SO) magnetic field. Spin polarization is clearly identified as the emergence of a spin component parallel to either magnetic field. We show that Onsager's reciprocity is fulfilled when time reversal symmetry is present and no spin polarization arises, no matter the barrier parameters or the SO strength. Introducing a Büttiker's decoherence probe, that preserves unitarity of time evolution, we show that breaking of TRS results in a strong spin polarization for realistic SO, and barrier strengths. We discuss the significance of these results as a very general scenario for the onset of the Chiral-Induced Spin Selectivity effect (CISS). |
| first_indexed | 2024-03-13T04:31:48Z |
| format | Article |
| id | doaj.art-3cb0841997b642b8a63bf34634f285a7 |
| institution | Directory Open Access Journal |
| issn | 2666-9366 |
| language | English |
| last_indexed | 2024-03-13T04:31:48Z |
| publishDate | 2023-06-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Core |
| spelling | doaj.art-3cb0841997b642b8a63bf34634f285a72023-06-19T09:59:35ZengSciPostSciPost Physics Core2666-93662023-06-016204410.21468/SciPostPhysCore.6.2.044Spin polarization induced by decoherence in a tunneling one-dimensional Rashba modelSolmar Varela, Mayra Peralta, Vladimiro Mujica, Bertrand Berche, Ernesto MedinaBasic questions on the nature of spin polarization in two terminal systems and the way in which decoherence breaks Time-Reversal Symmetry (TRS) are analyzed. We exactly solve several one-dimensional models of tunneling electrons and show the interplay of spin precession and decay of the wavefunction in either a $U(1)$ magnetic field or an effective Spin-Orbit (SO) magnetic field. Spin polarization is clearly identified as the emergence of a spin component parallel to either magnetic field. We show that Onsager's reciprocity is fulfilled when time reversal symmetry is present and no spin polarization arises, no matter the barrier parameters or the SO strength. Introducing a Büttiker's decoherence probe, that preserves unitarity of time evolution, we show that breaking of TRS results in a strong spin polarization for realistic SO, and barrier strengths. We discuss the significance of these results as a very general scenario for the onset of the Chiral-Induced Spin Selectivity effect (CISS).https://scipost.org/SciPostPhysCore.6.2.044 |
| spellingShingle | Solmar Varela, Mayra Peralta, Vladimiro Mujica, Bertrand Berche, Ernesto Medina Spin polarization induced by decoherence in a tunneling one-dimensional Rashba model SciPost Physics Core |
| title | Spin polarization induced by decoherence in a tunneling one-dimensional Rashba model |
| title_full | Spin polarization induced by decoherence in a tunneling one-dimensional Rashba model |
| title_fullStr | Spin polarization induced by decoherence in a tunneling one-dimensional Rashba model |
| title_full_unstemmed | Spin polarization induced by decoherence in a tunneling one-dimensional Rashba model |
| title_short | Spin polarization induced by decoherence in a tunneling one-dimensional Rashba model |
| title_sort | spin polarization induced by decoherence in a tunneling one dimensional rashba model |
| url | https://scipost.org/SciPostPhysCore.6.2.044 |
| work_keys_str_mv | AT solmarvarelamayraperaltavladimiromujicabertrandbercheernestomedina spinpolarizationinducedbydecoherenceinatunnelingonedimensionalrashbamodel |