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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201802356
|2 doi
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|a pubmed24n0966.xml
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|a (NLM)30370615
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|a DE-627
|b ger
|c DE-627
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|a eng
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|a Wang, Xinbo
|e verfasserin
|4 aut
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|a Ultrafast Spin-to-Charge Conversion at the Surface of Topological Insulator Thin Films
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 11.01.2019
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Strong spin-orbit coupling, resulting in the formation of spin-momentum-locked surface states, endows topological insulators with superior spin-to-charge conversion characteristics, though the dynamics that govern it have remained elusive. Here, an all-optical method is presented, which enables unprecedented tracking of the ultrafast dynamics of spin-to-charge conversion in a prototypical topological insulator Bi2 Se3 /ferromagnetic Co heterostructure, down to the sub-picosecond timescale. Compared to pure Bi2 Se3 or Co, a giant terahertz emission is observed in the heterostructure that originates from spin-to-charge conversion, in which the topological surface states play a crucial role. A 0.12 ps timescale is identified that sets a technological speed limit of spin-to-charge conversion processes in topological insulators. In addition, it is shown that the spin-to-charge conversion efficiency is temperature independent in Bi2 Se3 as expected from the nature of the surface states, paving the way for designing next-generation high-speed optospintronic devices based on topological insulators at room temperature
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|a Journal Article
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|a spin-to-charge conversion
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|a spintronics
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|a surface states
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|a terahertz emission spectroscopy
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|a topological insulators
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|a Cheng, Liang
|e verfasserin
|4 aut
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|a Zhu, Dapeng
|e verfasserin
|4 aut
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|a Wu, Yang
|e verfasserin
|4 aut
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|a Chen, Mengji
|e verfasserin
|4 aut
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|a Wang, Yi
|e verfasserin
|4 aut
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|a Zhao, Daming
|e verfasserin
|4 aut
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|a Boothroyd, Chris B
|e verfasserin
|4 aut
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|a Lam, Yeng Ming
|e verfasserin
|4 aut
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|a Zhu, Jian-Xin
|e verfasserin
|4 aut
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|a Battiato, Marco
|e verfasserin
|4 aut
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|a Song, Justin C W
|e verfasserin
|4 aut
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|a Yang, Hyunsoo
|e verfasserin
|4 aut
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|a Chia, Elbert E M
|e verfasserin
|4 aut
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 30(2018), 52 vom: 15. Dez., Seite e1802356
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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|g volume:30
|g year:2018
|g number:52
|g day:15
|g month:12
|g pages:e1802356
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|u http://dx.doi.org/10.1002/adma.201802356
|3 Volltext
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