Probe of spin dynamics in superconducting NbN thin films via spin pumping
The emerging field of superconductor (SC) spintronics has attracted intensive attentions recently. Many fantastic spin-dependent properties in SCs have been discovered, including large magnetoresistance, long spin lifetimes, and the giant spin Hall effect, etc. Regarding the spin dynamics in superco...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/116368 https://orcid.org/0000-0002-2480-1211 |
| _version_ | 1826195404577832960 |
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| author | Yao, Yunyan Song, Qi Takamura, Yota Cascales, Juan Pedro Yuan, Wei Ma, Yang Yun, Yu Xie, X. C. Han, Wei Moodera, Jagadeesh |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Yao, Yunyan Song, Qi Takamura, Yota Cascales, Juan Pedro Yuan, Wei Ma, Yang Yun, Yu Xie, X. C. Han, Wei Moodera, Jagadeesh |
| author_sort | Yao, Yunyan |
| collection | MIT |
| description | The emerging field of superconductor (SC) spintronics has attracted intensive attentions recently. Many fantastic spin-dependent properties in SCs have been discovered, including large magnetoresistance, long spin lifetimes, and the giant spin Hall effect, etc. Regarding the spin dynamics in superconducting thin films, few studies have been reported yet. Here, we report the investigation of the spin dynamics in an s-wave superconducting NbN film via spin pumping from an adjacent insulating ferromagnet GdN film. A profound coherence peak of the Gilbert damping of GdN is observed slightly below the superconducting critical temperature of the NbN, which agrees well with recent theoretical prediction for s-wave SCs in the presence of impurity spin-orbit scattering. This observation is also a manifestation of the dynamic spin injection into superconducting NbN thin film. Our results demonstrate that spin pumping could be used to probe the dynamic spin susceptibility of superconducting thin films, thus pave the way for future investigation of spin dynamics of interfacial and two-dimensional crystalline SCs. |
| first_indexed | 2024-09-23T10:12:27Z |
| format | Article |
| id | mit-1721.1/116368 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:12:27Z |
| publishDate | 2018 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1163682022-09-26T16:26:35Z Probe of spin dynamics in superconducting NbN thin films via spin pumping Yao, Yunyan Song, Qi Takamura, Yota Cascales, Juan Pedro Yuan, Wei Ma, Yang Yun, Yu Xie, X. C. Han, Wei Moodera, Jagadeesh Massachusetts Institute of Technology. Department of Physics Moodera, Jagadeesh The emerging field of superconductor (SC) spintronics has attracted intensive attentions recently. Many fantastic spin-dependent properties in SCs have been discovered, including large magnetoresistance, long spin lifetimes, and the giant spin Hall effect, etc. Regarding the spin dynamics in superconducting thin films, few studies have been reported yet. Here, we report the investigation of the spin dynamics in an s-wave superconducting NbN film via spin pumping from an adjacent insulating ferromagnet GdN film. A profound coherence peak of the Gilbert damping of GdN is observed slightly below the superconducting critical temperature of the NbN, which agrees well with recent theoretical prediction for s-wave SCs in the presence of impurity spin-orbit scattering. This observation is also a manifestation of the dynamic spin injection into superconducting NbN thin film. Our results demonstrate that spin pumping could be used to probe the dynamic spin susceptibility of superconducting thin films, thus pave the way for future investigation of spin dynamics of interfacial and two-dimensional crystalline SCs. 2018-06-18T17:51:01Z 2018-06-18T17:51:01Z 2018-06 2018-03 2018-06-13T18:00:11Z Article http://purl.org/eprint/type/JournalArticle http://hdl.handle.net/1721.1/116368 Yao, Yunyan et al. Physical Review B 97, 22 "Probe of spin dynamics in superconducting NbN thin films via spin pumping." (June 2018): 224414 © 2018 American Physical Society https://orcid.org/0000-0002-2480-1211 en http://dx.doi.org/10.1103/PhysRevB.97.224414 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Yao, Yunyan Song, Qi Takamura, Yota Cascales, Juan Pedro Yuan, Wei Ma, Yang Yun, Yu Xie, X. C. Han, Wei Moodera, Jagadeesh Probe of spin dynamics in superconducting NbN thin films via spin pumping |
| title | Probe of spin dynamics in superconducting NbN thin films via spin pumping |
| title_full | Probe of spin dynamics in superconducting NbN thin films via spin pumping |
| title_fullStr | Probe of spin dynamics in superconducting NbN thin films via spin pumping |
| title_full_unstemmed | Probe of spin dynamics in superconducting NbN thin films via spin pumping |
| title_short | Probe of spin dynamics in superconducting NbN thin films via spin pumping |
| title_sort | probe of spin dynamics in superconducting nbn thin films via spin pumping |
| url | http://hdl.handle.net/1721.1/116368 https://orcid.org/0000-0002-2480-1211 |
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