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Magnetically Controllable Two-Dimensional Spin Transport in a 3D Crystal

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Title
Magnetically Controllable Two-Dimensional Spin Transport in a 3D Crystal
Author(s)
Dowinton, Oliver; Maryenko, Denis; Belosludov, Rodion Vladimirovich; Bohm-Jung Yang; Bahramy, Mohammad Saeed
Publication Date
2023-10
Journal
Advanced Functional Materials, v.33, no.43
Publisher
John Wiley & Sons Ltd.
Abstract
2D phases of matter have become a new paradigm in condensed matter physics, bringing in an abundance of novel quantum phenomena with promising device applications. However, realizing such quantum phases has its own challenges, stimulating research into non-traditional methods to create them. One such attempt is presented here, where the intrinsic crystal anisotropy in a “fractional” perovskite, EuxTaO3 (x = 1/3 − 1/2), leads to the formation of stacked layers of quasi-2D electron gases, despite being a 3D bulk system. These carriers possess topologically non-trivial spin textures, indirectly controlled by an external magnetic field via proximity effect, making it an ideal system for spintronics, for which several possible applications are proposed. An anomalous Hall effect with a non-monotonic dependence on carrier density is shown to exist, signifying a shift in band topology with carrier doping. Furthermore, quantum oscillations in charge conductivity and oscillating thermoelectric properties are examined and proposed as routes to experimentally demonstrate the quasi-2D behavior. © 2023 The Authors. Advanced Functional Materials published by Wiley-VCH GmbH.
URI
https://pr.ibs.re.kr/handle/8788114/14030
DOI
10.1002/adfm.202300995
ISSN
1616-301X
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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