Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states
Spin-momentum locking in protected surface states enables efficient electrical detection of magnon decay at a magnetic-insulator/topological-insulator heterojunction. Here we demonstrate this property using the spin Seebeck effect (SSE), that is, measuring the transverse thermoelectric response to a...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2017
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| Online Access: | http://hdl.handle.net/1721.1/110598 https://orcid.org/0000-0001-7413-5715 https://orcid.org/0000-0002-2480-1211 |
| _version_ | 1811079479607427072 |
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| author | Jiang, Zilong Masir, Massoud Ramezani Tang, Chi Xu, Yadong MacDonald, Allan H. Shi, Jing Chang, Cui-zu Moodera, Jagadeesh |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Jiang, Zilong Masir, Massoud Ramezani Tang, Chi Xu, Yadong MacDonald, Allan H. Shi, Jing Chang, Cui-zu Moodera, Jagadeesh |
| author_sort | Jiang, Zilong |
| collection | MIT |
| description | Spin-momentum locking in protected surface states enables efficient electrical detection of magnon decay at a magnetic-insulator/topological-insulator heterojunction. Here we demonstrate this property using the spin Seebeck effect (SSE), that is, measuring the transverse thermoelectric response to a temperature gradient across a thin film of yttrium iron garnet, an insulating ferrimagnet, and forming a heterojunction with (Bi[subscript x]Sb[subscript 1−x])[subscript 2]Te[subscript 3], a topological insulator. The non-equilibrium magnon population established at the interface can decay in part by interactions of magnons with electrons near the Fermi energy of the topological insulator. When this decay channel is made active by tuning (Bi[subscript x]Sb[subscript 1−x])[subscript 2]Te[subscript 3] into a bulk insulator, a large electromotive force emerges in the direction perpendicular to the in-plane magnetization of yttrium iron garnet. The enhanced, tunable SSE which occurs when the Fermi level lies in the bulk gap offers unique advantages over the usual SSE in metals and therefore opens up exciting possibilities in spintronics. |
| first_indexed | 2024-09-23T11:15:41Z |
| format | Article |
| id | mit-1721.1/110598 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:15:41Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1105982022-09-27T18:15:15Z Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states Jiang, Zilong Masir, Massoud Ramezani Tang, Chi Xu, Yadong MacDonald, Allan H. Shi, Jing Chang, Cui-zu Moodera, Jagadeesh Massachusetts Institute of Technology. Department of Physics Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Chang, Cui-zu Moodera, Jagadeesh Spin-momentum locking in protected surface states enables efficient electrical detection of magnon decay at a magnetic-insulator/topological-insulator heterojunction. Here we demonstrate this property using the spin Seebeck effect (SSE), that is, measuring the transverse thermoelectric response to a temperature gradient across a thin film of yttrium iron garnet, an insulating ferrimagnet, and forming a heterojunction with (Bi[subscript x]Sb[subscript 1−x])[subscript 2]Te[subscript 3], a topological insulator. The non-equilibrium magnon population established at the interface can decay in part by interactions of magnons with electrons near the Fermi energy of the topological insulator. When this decay channel is made active by tuning (Bi[subscript x]Sb[subscript 1−x])[subscript 2]Te[subscript 3] into a bulk insulator, a large electromotive force emerges in the direction perpendicular to the in-plane magnetization of yttrium iron garnet. The enhanced, tunable SSE which occurs when the Fermi level lies in the bulk gap offers unique advantages over the usual SSE in metals and therefore opens up exciting possibilities in spintronics. 2017-07-10T17:45:51Z 2017-07-10T17:45:51Z 2016-05 2016-01 Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/110598 Jiang, Zilong et al. “Enhanced Spin Seebeck Effect Signal due to Spin-Momentum Locked Topological Surface States.” Nature Communications 7 (2016): 11458. https://orcid.org/0000-0001-7413-5715 https://orcid.org/0000-0002-2480-1211 en_US http://dx.doi.org/10.1038/ncomms11458 Nature Communications Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature |
| spellingShingle | Jiang, Zilong Masir, Massoud Ramezani Tang, Chi Xu, Yadong MacDonald, Allan H. Shi, Jing Chang, Cui-zu Moodera, Jagadeesh Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states |
| title | Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states |
| title_full | Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states |
| title_fullStr | Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states |
| title_full_unstemmed | Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states |
| title_short | Enhanced spin Seebeck effect signal due to spin-momentum locked topological surface states |
| title_sort | enhanced spin seebeck effect signal due to spin momentum locked topological surface states |
| url | http://hdl.handle.net/1721.1/110598 https://orcid.org/0000-0001-7413-5715 https://orcid.org/0000-0002-2480-1211 |
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