Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing
We show conceptually that the edge of a two-dimensional topological insulator can be used to construct a solid-state Stern–Gerlach spin splitter. By threading such a Stern–Gerlach apparatus with a magnetic flux, Aharanov–Bohm-like interference effects are introduced. Using ferromagnetic leads, the s...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Beilstein-Institut
2018-05-01
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| Series: | Beilstein Journal of Nanotechnology |
| Subjects: | |
| Online Access: | https://doi.org/10.3762/bjnano.9.147 |
| _version_ | 1798043125178957824 |
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| author | Kristofer Björnson Annica M. Black-Schaffer |
| author_facet | Kristofer Björnson Annica M. Black-Schaffer |
| author_sort | Kristofer Björnson |
| collection | DOAJ |
| description | We show conceptually that the edge of a two-dimensional topological insulator can be used to construct a solid-state Stern–Gerlach spin splitter. By threading such a Stern–Gerlach apparatus with a magnetic flux, Aharanov–Bohm-like interference effects are introduced. Using ferromagnetic leads, the setup can be used to both measure magnetic flux and as a spintronics switch. With normal metallic leads a switchable spintronics NOT-gate can be implemented. Furthermore, we show that a sequence of such devices can be used to construct a single-qubit SU(2)-gate, one of the two gates required for a universal quantum computer. The field sensitivity, or switching field, b, is related to the characteristic size of the device, r, through b = h/(2πqr2), with q being the unit of electric charge. |
| first_indexed | 2024-04-11T22:46:07Z |
| format | Article |
| id | doaj.art-59bcdf7f19b643d1b968b873004787a5 |
| institution | Directory Open Access Journal |
| issn | 2190-4286 |
| language | English |
| last_indexed | 2024-04-11T22:46:07Z |
| publishDate | 2018-05-01 |
| publisher | Beilstein-Institut |
| record_format | Article |
| series | Beilstein Journal of Nanotechnology |
| spelling | doaj.art-59bcdf7f19b643d1b968b873004787a52022-12-22T03:58:46ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862018-05-01911558156310.3762/bjnano.9.1472190-4286-9-147Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computingKristofer Björnson0Annica M. Black-Schaffer1Department of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, SwedenDepartment of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, SwedenWe show conceptually that the edge of a two-dimensional topological insulator can be used to construct a solid-state Stern–Gerlach spin splitter. By threading such a Stern–Gerlach apparatus with a magnetic flux, Aharanov–Bohm-like interference effects are introduced. Using ferromagnetic leads, the setup can be used to both measure magnetic flux and as a spintronics switch. With normal metallic leads a switchable spintronics NOT-gate can be implemented. Furthermore, we show that a sequence of such devices can be used to construct a single-qubit SU(2)-gate, one of the two gates required for a universal quantum computer. The field sensitivity, or switching field, b, is related to the characteristic size of the device, r, through b = h/(2πqr2), with q being the unit of electric charge.https://doi.org/10.3762/bjnano.9.147Aharanov–Bohmquantum computingspintronicsStern–GerlachSU(2)topological insulator |
| spellingShingle | Kristofer Björnson Annica M. Black-Schaffer Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing Beilstein Journal of Nanotechnology Aharanov–Bohm quantum computing spintronics Stern–Gerlach SU(2) topological insulator |
| title | Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing |
| title_full | Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing |
| title_fullStr | Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing |
| title_full_unstemmed | Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing |
| title_short | Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing |
| title_sort | solid state stern gerlach spin splitter for magnetic field sensing spintronics and quantum computing |
| topic | Aharanov–Bohm quantum computing spintronics Stern–Gerlach SU(2) topological insulator |
| url | https://doi.org/10.3762/bjnano.9.147 |
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