| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Possible Evidence for Spin-Transfer Torque Induced by Spin-Triplet Supercurrents |
| Lai-Lai Li1,3, Yue-Lei Zhao2**, Xi-Xiang Zhang2, Young Sun1,3** |
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
2King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
3School of Physical Science, University of Chinese Academy of Sciences, Beijing 100190 |
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| Cite this article: |
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Lai-Lai Li, Yue-Lei Zhao, Xi-Xiang Zhang et al 2018 Chin. Phys. Lett. 35 077401 |
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Abstract The mutual interplay between superconductivity and magnetism in superconductor/ferromagnet heterostructures may give rise to unusual proximity effects beyond current knowledge. Especially, spin-triplet Cooper pairs could be created at carefully engineered superconductor/ferromagnet interfaces. Here we report a giant proximity effect on spin dynamics in superconductor/ferromagnet/superconductor Josephson junctions. Below the superconducting transition temperature $T_{\rm C}$, the ferromagnetic resonance field at X-band ($\sim$9.0 GHz) shifts rapidly to a lower field with decreasing temperature. In strong contrast, this phenomenon is absent in ferromagnet/superconductor bilayers and superconductor/insulator/ferromagnet/superconductor multilayers. Such an intriguing phenomenon can not be interpreted by the conventional Meissner effect. Instead, we propose that the strong influence on spin dynamics could be due to spin-transfer torque associated with spin-triplet supercurrents in ferromagnetic Josephson junctions with precessing magnetization.
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Received: 21 June 2018
Published: 24 June 2018
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| PACS: |
74.45.+c
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(Proximity effects; Andreev reflection; SN and SNS junctions)
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74.78.Fk
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(Multilayers, superlattices, heterostructures)
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76.50.+g
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(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 51725104 and 11534015, and the National Key Research and Development Program of China under Grant No 2016YFA0300700. Y.S. also acknowledges the support from Chinese Academy of Sciences under Grant No XDB07030200. |
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| [1] | Linder J and Robinson J W A 2015 Nat. Phys. 11 307 | | [2] | Matthias E 2015 Rep. Prog. Phys. 78 104501 | | [3] | Bergeret F S, Volkov A F and Efetov K B 2005 Rev. Mod. Phys. 77 1321 | | [4] | Eschrig M and Löfwander T 2008 Nat. Phys. 4 138 | | [5] | Eremin I, Nogueira F S and Tarento R J 2006 Phys. Rev. B 73 054507 | | [6] | Houzet M and Buzdin A I 2007 Phys. Rev. B 76 060504(R) | | [7] | Alidoust M, Linder J, Rashedi G et al 2010 Phys. Rev. B 81 014512 | | [8] | Halász G B, Blamire M G and Robinson J W A 2011 Phys. Rev. B 84 024517 | | [9] | Trifunovic L, Popovic Z and Radovic Z 2011 Phys. Rev. B 84 064511 | | [10] | Mal'shukov A G and Brataas A 2012 Phys. Rev. B 86 094517 | | [11] | Bergeret F S and Tokatly I V 2014 Phys. Rev. B 89 134517 | | [12] | Loder F, Kampf A P and Kopp T 2013 J. Phys.: Condens. Matter 25 362201 | | [13] | Jacobsen S H and Linder J 2015 Phys. Rev. B 92 024501 | | [14] | Smidman M, Salamon M B, Yuan H Q et al 2017 Rep. Prog. Phys. 80 036501 | | [15] | Keizer R S, Goennenwein S T, Klapwijk T M et al 2006 Nature 439 825 | | [16] | Anwar M S, Czeschka F, Hesselberth M et al 2010 Phys. Rev. B 82 100501(R) | | [17] | Khaire S T, Khasawneh M, Pratt W P Jr et al 2010 Phys. Rev. Lett. 104 137002 | | [18] | Robinson J W, Witt J D S and Blamire M G 2010 Science 329 59 | | [19] | Sprungmann D, Westerholt K, Zabel H et al 2010 Phys. Rev. B 82 060505(R) | | [20] | Banerjee N, Robinson J W and Blamire M G 2014 Nat. Commun. 5 4771 | | [21] | Ralpha D C and Stiles M D 2008 J. Magn. Magn. Mater. 320 1190 | | [22] | Bell C, Milikisyants S, Huber M et al 2008 Phys. Rev. Lett. 100 047002 | | [23] | Zhao E and Sauls J 2008 Phys. Rev. B 78 174511 | | [24] | Konschelle F and Buzdin A 2009 Phys. Rev. Lett. 102 017001 | | [25] | Sacramento P D and Araujo M A N 2010 Eur. Phys. J. B 76 251 | | [26] | Linder J and Yokoyama T 2011 Phys. Rev. B 83 012501 | | [27] | Hoffman S, Blanter Y M and Tserkovnyak Y 2012 Phys. Rev. B 86 054427 | | [28] | Takahashi S, Hikino S, Mori M et al 2007 Phys. Rev. Lett. 99 057003 | | [29] | Houzet M 2008 Phys. Rev. Lett. 101 057009 | | [30] | Holmqvist C, Teber S and Fogelström M 2011 Phys. Rev. B 83 104521 | | [31] | Holmqvist C, Belzig W and Fogelström M 2012 Phys. Rev. B 86 054519 | | [32] | Wu H, Ni J, Cai J et al 2007 Phys. Rev. B 76 024416 | | [33] | Zou T, Wu H, Cheng Z et al 2010 J. Magn. Magn. Mater. 322 169 |
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