Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator
We theoretically show that the edge of a quantum spin Hall insulator (QSHI), attached to an insulating ferromagnet (FM), can realize a highly efficient spin-to-charge conversion. Based on a one-dimensional QSHI-FM junction, the electron dynamics on the QSHI edge is analyzed, driven by a magnetizatio...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-05-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023195 |
| _version_ | 1797211380038762496 |
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| author | Yasufumi Araki Takahiro Misawa Kentaro Nomura |
| author_facet | Yasufumi Araki Takahiro Misawa Kentaro Nomura |
| author_sort | Yasufumi Araki |
| collection | DOAJ |
| description | We theoretically show that the edge of a quantum spin Hall insulator (QSHI), attached to an insulating ferromagnet (FM), can realize a highly efficient spin-to-charge conversion. Based on a one-dimensional QSHI-FM junction, the electron dynamics on the QSHI edge is analyzed, driven by a magnetization dynamics in the FM. Under a large gap opening on the edge from the magnetic exchange coupling, we find that the spin injection into the QSHI edge gets suppressed while the charge current driven on the edge gets maximized, demanded by the band topology of the one-dimensional helical edge states. |
| first_indexed | 2024-04-24T10:25:34Z |
| format | Article |
| id | doaj.art-14e1c3aa32ab463e966c8008ee76c384 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:25:34Z |
| publishDate | 2020-05-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-14e1c3aa32ab463e966c8008ee76c3842024-04-12T16:54:14ZengAmerican Physical SocietyPhysical Review Research2643-15642020-05-012202319510.1103/PhysRevResearch.2.023195Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulatorYasufumi ArakiTakahiro MisawaKentaro NomuraWe theoretically show that the edge of a quantum spin Hall insulator (QSHI), attached to an insulating ferromagnet (FM), can realize a highly efficient spin-to-charge conversion. Based on a one-dimensional QSHI-FM junction, the electron dynamics on the QSHI edge is analyzed, driven by a magnetization dynamics in the FM. Under a large gap opening on the edge from the magnetic exchange coupling, we find that the spin injection into the QSHI edge gets suppressed while the charge current driven on the edge gets maximized, demanded by the band topology of the one-dimensional helical edge states.http://doi.org/10.1103/PhysRevResearch.2.023195 |
| spellingShingle | Yasufumi Araki Takahiro Misawa Kentaro Nomura Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator Physical Review Research |
| title | Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator |
| title_full | Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator |
| title_fullStr | Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator |
| title_full_unstemmed | Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator |
| title_short | Dynamical spin-to-charge conversion on the edge of quantum spin Hall insulator |
| title_sort | dynamical spin to charge conversion on the edge of quantum spin hall insulator |
| url | http://doi.org/10.1103/PhysRevResearch.2.023195 |
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