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Bhattacharyya S, Akhgar G, Gebert M, Karel J, Edmonds MT, Fuhrer MS. Recent Progress in Proximity Coupling of Magnetism to Topological Insulators. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2007795. [PMID: 34185344 DOI: 10.1002/adma.202007795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 01/11/2021] [Indexed: 05/08/2023]
Abstract
Inducing long-range magnetic order in 3D topological insulators can gap the Dirac-like metallic surface states, leading to exotic new phases such as the quantum anomalous Hall effect or the axion insulator state. These magnetic topological phases can host robust, dissipationless charge and spin currents or unique magnetoelectric behavior, which can be exploited in low-energy electronics and spintronics applications. Although several different strategies have been successfully implemented to realize these states, to date these phenomena have been confined to temperatures below a few Kelvin. This review focuses on one strategy: inducing magnetic order in topological insulators by proximity of magnetic materials, which has the capability for room temperature operation, unlocking the potential of magnetic topological phases for applications. The unique advantages of this strategy, the important physical mechanisms facilitating magnetic proximity effect, and the recent progress to achieve, understand, and harness proximity-coupled magnetic order in topological insulators are discussed. Some emerging new phenomena and applications enabled by proximity coupling of magnetism and topological materials, such as skyrmions and the topological Hall effect, are also highlighted, and the authors conclude with an outlook on remaining challenges and opportunities in the field.
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Affiliation(s)
- Semonti Bhattacharyya
- School of Physics and Astronomy, Monash University, Victoria, 3800, Australia
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Victoria, 3800, Australia
| | - Golrokh Akhgar
- School of Physics and Astronomy, Monash University, Victoria, 3800, Australia
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Victoria, 3800, Australia
| | - Matthew Gebert
- School of Physics and Astronomy, Monash University, Victoria, 3800, Australia
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Victoria, 3800, Australia
| | - Julie Karel
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Victoria, 3800, Australia
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria, 3800, Australia
| | - Mark T Edmonds
- School of Physics and Astronomy, Monash University, Victoria, 3800, Australia
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Victoria, 3800, Australia
| | - Michael S Fuhrer
- School of Physics and Astronomy, Monash University, Victoria, 3800, Australia
- ARC Centre of Excellence in Future Low-Energy Electronics Technologies, Monash University, Victoria, 3800, Australia
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Tarasov IA, Smolyarova TE, Nemtsev IV, Yakovlev IA, Volochaev MN, Solovyov LA, Varnakov SN, Ovchinnikov SG. Tailoring the preferable orientation relationship and shape of α-FeSi 2 nanocrystals on Si(001): the impact of gold and the Si/Fe flux ratio, and the origin of α/Si boundaries. CrystEngComm 2020. [DOI: 10.1039/d0ce00399a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
An approach for tuning the preferable orientation relationships and shapes of free-standing α-FeSi2 nanocrystals was demonstrated on a Si(001) surface.
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Affiliation(s)
- Ivan A. Tarasov
- Kirensky Institute of Physics
- Federal Research Center, KSC SB RAS
- Krasnoyarsk
- Russia
| | - Tatiana E. Smolyarova
- Kirensky Institute of Physics
- Federal Research Center, KSC SB RAS
- Krasnoyarsk
- Russia
- Siberian Federal University
| | - Ivan V. Nemtsev
- Kirensky Institute of Physics
- Federal Research Center, KSC SB RAS
- Krasnoyarsk
- Russia
- Federal Research Center KSC SB RAS
| | - Ivan A. Yakovlev
- Kirensky Institute of Physics
- Federal Research Center, KSC SB RAS
- Krasnoyarsk
- Russia
| | - Mikhail N. Volochaev
- Kirensky Institute of Physics
- Federal Research Center, KSC SB RAS
- Krasnoyarsk
- Russia
- Reshetnev Siberian State University of Science and Technology
| | - Leonid A. Solovyov
- Institute of Chemistry and Chemical Technology
- Federal Research Center KSC SB RAS
- 660036 Krasnoyarsk
- Russia
| | - Sergey N. Varnakov
- Kirensky Institute of Physics
- Federal Research Center, KSC SB RAS
- Krasnoyarsk
- Russia
| | - Sergey G. Ovchinnikov
- Kirensky Institute of Physics
- Federal Research Center, KSC SB RAS
- Krasnoyarsk
- Russia
- Siberian Federal University
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