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.

引用

页数：5

共 25 条

[1] Spin and Charge Transport on the Surface of a Topological Insulator [J].

Burkov, A. A. ;

Hawthorn, D. G. .

PHYSICAL REVIEW LETTERS, 2010, 105 (06)

[2] Massive Dirac Fermion on the Surface of a Magnetically Doped Topological Insulator [J].

Chen, Y. L. ;

Chu, J. -H. ;

Analytis, J. G. ;

Liu, Z. K. ;

Igarashi, K. ;

Kuo, H. -H. ;

Qi, X. L. ;

Mo, S. K. ;

Moore, R. G. ;

Lu, D. H. ;

Hashimoto, M. ;

Sasagawa, T. ;

Zhang, S. C. ;

Fisher, I. R. ;

Hussain, Z. ;

Shen, Z. X. .

SCIENCE, 2010, 329 (5992) :659-662

[3] Two-dimensional surface charge transport in topological insulators [J].

Culcer, Dimitrie ;

Hwang, E. H. ;

Stanescu, Tudor D. ;

Das Sarma, S. .

PHYSICAL REVIEW B, 2010, 82 (15)

[4] Room Temperature Electrical Detection of Spin Polarized Currents in Topological Insulators [J].

Dankert, Andre ;

Geurs, Johannes ;

Kamalakar, M. Venkata ;

Charpentier, Sophie ;

Dash, Saroj P. .

NANO LETTERS, 2015, 15 (12) :7976-7981

[5] Absence of superconductivity in ultrathin layers of FeSe synthesized on a topological insulator [J].

Eich, Andreas ;

Rollfing, Nils ;

Arnold, Fabian ;

Sanders, Charlotte ;

Ewen, Pascal R. ;

Bianchi, Marco ;

Dendzik, Maciej ;

Michiardi, Matteo ;

Mi, Jian-Li ;

Bremholm, Martin ;

Wegner, Daniel ;

Hofmann, Philip ;

Khajetoorians, Alexander A. .

PHYSICAL REVIEW B, 2016, 94 (12)

[6] Topological insulators in three dimensions [J].

Fu, Liang ;

Kane, C. L. ;

Mele, E. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[7] A topological Dirac insulator in a quantum spin Hall phase [J].

Hsieh, D. ;

Qian, D. ;

Wray, L. ;

Xia, Y. ;

Hor, Y. S. ;

Cava, R. J. ;

Hasan, M. Z. .

NATURE, 2008, 452 (7190) :970-U5

[8]

Kong DS, 2011, NAT CHEM, V3, P845, DOI [10.1038/nchem.1171, 10.1038/NCHEM.1171]

[9] Mapping the chemical potential dependence of current-induced spin polarization in a topological insulator [J].

Lee, Joon Sue ;

Richardella, Anthony ;

Hickey, Danielle Reifsnyder ;

Mkhoyan, K. Andre ;

Samarth, Nitin .

PHYSICAL REVIEW B, 2015, 92 (15)

[10]

Li CH, 2014, NAT NANOTECHNOL, V9, P218, DOI [10.1038/nnano.2014.16, 10.1038/NNANO.2014.16]

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