Room-temperature electric field control of spin filtering efficiency for enhanced modulation of optical spin polarization in a defect-functional 0D–2D hybrid nanostructure

Park, Soyoung; Hiura, Satoshi; Kise, Hiroto; Takayama, Junichi; Sueoka, Kazuhisa; Murayama, Akihiro

doi:10.1039/d3nr03438k

Nanoscale

2023

DOI: 10.1039/d3nr03438k

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Room-temperature electric field control of spin filtering efficiency for enhanced modulation of optical spin polarization in a defect-functional 0D–2D hybrid nanostructure

Soyoung Park,

Satoshi Hiura,

Hiroto Kise

et al.

Abstract: We demonstrate an electric field control of optical spin polarization of InAs quantum dots in the range of 15–40% at room temperature. This accomplishment is achieved by tuning the spin amplification degree of dilute nitride GaNAs quantum well.

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2024

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Electric field control of magnetic anisotropy and model for oriented Co/graphene design

Chang,

Chow,

Jiang

et al. 2024

Applied Physics Letters

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Electric field controlled magnetic devices have attracted interest in the area of magnetic recording research, owing to their lower power consumption and high stability. While heterostructures composed of Co and carbon materials exhibit unique properties, our understanding of the magnetic properties of Co on graphene with a wavelike structure and related electric field-controlled phenomena remains limited. Here, we demonstrate the preparation of a customized Co/graphene structure, in which the controllability of the coercive force is enhanced. Taking the coercive force and geometric factor of Co into consideration, a shape-dependent magnetic anisotropy is proposed, which sufficiently explains the correlation between the coercive force and the aspect ratios of the Co stripes. For the magnetic field perpendicular to the bottom lines of canyons, the adjustment capability of the coercive force is enhanced under conditions of a more negatively charged surface. Based on the large electric field and related magnetic anisotropy energy, a ferro-ionic control (FeIC) model is proposed, which describes the relationship between the electric potential and coercive force in electrified conditions. Based on a FeIC model with a preferred orientation, we propose a design of an integrated FeIC inductor with field tunability that could strongly impact the field of integrated-circuit design, resulting in wider applications and functionalities of chips.

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Electric field control of magnetic anisotropy and model for oriented Co/graphene design

Chang,

Chow,

Jiang

et al. 2024

Applied Physics Letters

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show abstract

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Room-temperature electric field control of spin filtering efficiency for enhanced modulation of optical spin polarization in a defect-functional 0D–2D hybrid nanostructure

Abstract: We demonstrate an electric field control of optical spin polarization of InAs quantum dots in the range of 15–40% at room temperature. This accomplishment is achieved by tuning the spin amplification degree of dilute nitride GaNAs quantum well.

Cited by 1 publication

References 43 publications

Electric field control of magnetic anisotropy and model for oriented Co/graphene design

Electric field control of magnetic anisotropy and model for oriented Co/graphene design

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