Interfacial reactions at Fe/topological insulator spin contacts

被引：6
作者：
Majumder, Sarmita [1 ]
Jarvis, Karalee [1 ]
Banerjee, Sanjay K. [1 ]
Kavanagh, Karen L. [2 ]
机构：
[1] Univ Texas Austin, Microelect Res Ctr, Austin, TX 78758 USA
[2] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada
来源：
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 2017年 / 35卷 / 04期
基金：
美国国家卫生研究院; 加拿大自然科学与工程研究理事会;
关键词：
TOPOLOGICAL INSULATOR; ELECTRICAL DETECTION; ROOM-TEMPERATURE; SURFACE;
D O I：
10.1116/1.4991331
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The authors study the composition and abruptness of the interfacial layers that form during deposition and patterning of a ferromagnet, Fe on a topological insulator (TI), Bi2Se3, Bi2Te3, and SiOx/Bi2Te3. Such structures are potentially useful for spintronics. Cross-sectional transmission electron microscopy, including interfacial elemental mapping, confirms that Fe reacts with Bi2Se3 near room temperature, forming an abrupt 5 nm thick FeSe0.92 single crystalline binary phase, predominantly (001) oriented, with lattice fringe spacing of 0.55 nm. In contrast, Fe/Bi2Te3 forms a polycrystalline Fe/TI interfacial alloy that can be prevented by the addition of an evaporated SiOx separating Fe from the TI. (C) 2017 American Vacuum Society.
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页数：5
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  • [21] Electrical Detection of Spin-Polarized Surface States Conduction in (Bi0.5Sb0.47)2Te3 Topological Insulator
    Tang, Jianshi
    Chang, Li-Te
    Kou, Xufeng
    Murata, Koichi
    Choi, Eun Sang
    Lang, Murong
    Fan, Yabin
    Jiang, Ying
    Montazeri, Mohammad
    Jiang, Wanjun
    Wang, Yong
    He, Liang
    Wang, Kang L.
    [J]. NANO LETTERS, 2014, 14 (09) : 5423 - 5429
  • [22] Topological insulator based spin valve devices: Evidence for spin polarized transport of spin-momentum-locked topological surface states
    Tian, Jifa
    Childres, Isaac
    Cao, Helin
    Shen, Tian
    Miotkowski, Ireneusz
    Chen, Yong P.
    [J]. SOLID STATE COMMUNICATIONS, 2014, 191 : 1 - 5
  • [23] Observation of Distinct Bulk and Surface Chemical Environments in a Topological Insulator under Magnetic Doping
    Vobornik, Ivana
    Panaccione, Giancarlo
    Fujii, Jun
    Zhu, Zhi-Huai
    Offi, Francesco
    Salles, Benjamin R.
    Borgatti, Francesco
    Torelli, Piero
    Rueff, Jean Pascal
    Ceolin, Denis
    Artioli, Alberto
    Unnikrishnan, Manju
    Levy, Giorgio
    Marangolo, Massimiliano
    Eddrief, Mamhoud
    Krizmancic, Damjan
    Ji, Huiwen
    Damascelli, Andrea
    van der Laan, Gerrit
    Egdell, Russell G.
    Cava, Robert J.
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2014, 118 (23) : 12333 - 12339
  • [24] A topological insulator surface under strong Coulomb, magnetic and disorder perturbations
    Wray, L. Andrew
    Xu, Su-Yang
    Xia, Yuqi
    Hsieh, David
    Fedorov, Alexei V.
    Hor, Yew San
    Cava, Robert J.
    Bansil, Arun
    Lin, Hsin
    Hasan, M. Zahid
    [J]. NATURE PHYSICS, 2011, 7 (01) : 32 - 37
  • [25] Spin Polarization and Transport of Surface States in the Topological Insulators Bi2Se3 and Bi2Te3 from First Principles
    Yazyev, Oleg V.
    Moore, Joel E.
    Louie, Steven G.
    [J]. PHYSICAL REVIEW LETTERS, 2010, 105 (26)
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