Structural and proximity-induced ferromagnetic properties of topological insulator-magnetic insulator heterostructures
Abstract
The spontaneously broken time reversal symmetry can lead to the formation of an energy gap in the Dirac spectrum of the surface states of a topological insulator (TI) which can consequently give rise to a variety of interesting phenomena potentially useful for spintronics. In this work, we couple a non-magnetic TI to a high Curie temperature TC magnetic insulator to induce strong exchange interaction via the proximity effect. We have successfully grown 5 quintuple layer thick ternary TI (BixSb1-x)2Te3 films on atomically flat yttrium iron garnet (YIG) film with the combination of molecular beam epitaxy and pulsed laser deposition, in which the Fermi level position relative to the Dirac point is varied by controlling the Bi:Sb ratio. The anomalous Hall effect (AHE) and suppressed weak antilocalization (WAL) measured under out of plane magnetic fields reveal that the TI surface in contact with YIG is magnetized. Our high-quality (BixSb1-x)2Te3/Y IG heterostructure provides a tunable system for exploring the quantum anomalous Hall effect (QAHE) at higher temperatures in TI-based spintronic devices.
- Authors:
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1239443
- Alternate Identifier(s):
- OSTI ID: 1371206; OSTI ID: 1421031
- Grant/Contract Number:
- SC0012670
- Resource Type:
- Published Article
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Name: AIP Advances Journal Volume: 6 Journal Issue: 5; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics
Citation Formats
Jiang, Zilong, Chang, Cui-Zu, Tang, Chi, Zheng, Jian-Guo, Moodera, Jagadeesh S., and Shi, Jing. Structural and proximity-induced ferromagnetic properties of topological insulator-magnetic insulator heterostructures. United States: N. p., 2016.
Web. doi:10.1063/1.4943061.
Jiang, Zilong, Chang, Cui-Zu, Tang, Chi, Zheng, Jian-Guo, Moodera, Jagadeesh S., & Shi, Jing. Structural and proximity-induced ferromagnetic properties of topological insulator-magnetic insulator heterostructures. United States. https://doi.org/10.1063/1.4943061
Jiang, Zilong, Chang, Cui-Zu, Tang, Chi, Zheng, Jian-Guo, Moodera, Jagadeesh S., and Shi, Jing. Sun .
"Structural and proximity-induced ferromagnetic properties of topological insulator-magnetic insulator heterostructures". United States. https://doi.org/10.1063/1.4943061.
@article{osti_1239443,
title = {Structural and proximity-induced ferromagnetic properties of topological insulator-magnetic insulator heterostructures},
author = {Jiang, Zilong and Chang, Cui-Zu and Tang, Chi and Zheng, Jian-Guo and Moodera, Jagadeesh S. and Shi, Jing},
abstractNote = {The spontaneously broken time reversal symmetry can lead to the formation of an energy gap in the Dirac spectrum of the surface states of a topological insulator (TI) which can consequently give rise to a variety of interesting phenomena potentially useful for spintronics. In this work, we couple a non-magnetic TI to a high Curie temperature TC magnetic insulator to induce strong exchange interaction via the proximity effect. We have successfully grown 5 quintuple layer thick ternary TI (BixSb1-x)2Te3 films on atomically flat yttrium iron garnet (YIG) film with the combination of molecular beam epitaxy and pulsed laser deposition, in which the Fermi level position relative to the Dirac point is varied by controlling the Bi:Sb ratio. The anomalous Hall effect (AHE) and suppressed weak antilocalization (WAL) measured under out of plane magnetic fields reveal that the TI surface in contact with YIG is magnetized. Our high-quality (BixSb1-x)2Te3/Y IG heterostructure provides a tunable system for exploring the quantum anomalous Hall effect (QAHE) at higher temperatures in TI-based spintronic devices.},
doi = {10.1063/1.4943061},
journal = {AIP Advances},
number = 5,
volume = 6,
place = {United States},
year = {Sun May 01 00:00:00 EDT 2016},
month = {Sun May 01 00:00:00 EDT 2016}
}
https://doi.org/10.1063/1.4943061
Web of Science
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