Title |
Unidirectional spin-Hall and Rashba−Edelstein magnetoresistance in topological insulator-ferromagnet layer heterostructures
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Published in |
Nature Communications, January 2018
|
DOI | 10.1038/s41467-017-02491-3 |
Pubmed ID | |
Authors |
Yang Lv, James Kally, Delin Zhang, Joon Sue Lee, Mahdi Jamali, Nitin Samarth, Jian-Ping Wang |
Abstract |
The large spin-orbit coupling in topological insulators results in helical spin-textured Dirac surface states that are attractive for topological spintronics. These states generate an efficient spin-orbit torque on proximal magnetic moments. However, memory or logic spin devices based upon such switching require a non-optimal three-terminal geometry, with two terminals for the writing current and one for reading the state of the device. An alternative two-terminal device geometry is now possible by exploiting the recent discovery of the unidirectional spin Hall magnetoresistance in heavy metal/ferromagnet bilayers and unidirectional magnetoresistance in magnetic topological insulators. Here, we report the observation of such unidirectional magnetoresistance in a technologically relevant device geometry that combines a topological insulator with a conventional ferromagnetic metal. Our devices show a figure of merit (magnetoresistance per current density per total resistance) that is more than twice as large as the highest reported values in all-metal Ta/Co bilayers. |
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Geographical breakdown
Country | Count | As % |
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China | 1 | 50% |
Unknown | 1 | 50% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 2 | 100% |
Mendeley readers
Geographical breakdown
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Iran, Islamic Republic of | 1 | <1% |
Unknown | 199 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Ph. D. Student | 57 | 28% |
Researcher | 31 | 16% |
Student > Bachelor | 19 | 10% |
Student > Master | 16 | 8% |
Student > Doctoral Student | 11 | 6% |
Other | 28 | 14% |
Unknown | 38 | 19% |
Readers by discipline | Count | As % |
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Physics and Astronomy | 99 | 50% |
Materials Science | 28 | 14% |
Engineering | 20 | 10% |
Chemistry | 3 | 2% |
Computer Science | 2 | 1% |
Other | 4 | 2% |
Unknown | 44 | 22% |