Focus on the Rashba effect

Bihlmayer, Gustav; Rader, O.; Winkler, Roland

doi:10.1088/1367-2630/17/5/050202

Cited by 223 publications

(161 citation statements)

References 91 publications

(120 reference statements)

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“…This effect was first described by [Dresselhaus, 1955; Rashba and Sheka, 1959; Rashba, 1960] for systems with broken bulk inversion symmetry and [Ohkawa and Uemura, 1974; Vas'ko, 1979; Bychkov and Rashba, 1984] for systems with interfacial or surface inversion symmetry breaking, and leads to various significant spin-dependent transport phenomena. This inversion-symmetry breaking effect is commonly referred to as “Rashba splitting” and/or the “Rashba effect”; for a historical review of this topic, see [Bihlmayer at al., 2015]. …”

Section: Emergent Magnetism At Interfacesmentioning

confidence: 99%

Interface-induced phenomena in magnetism

et al. 2017

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This article reviews static and dynamic interfacial effects in magnetism, focusing on interfacially-driven magnetic effects and phenomena associated with spin-orbit coupling and intrinsic symmetry breaking at interfaces. It provides a historical background and literature survey, but focuses on recent progress, identifying the most exciting new scientific results and pointing to promising future research directions. It starts with an introduction and overview of how basic magnetic properties are affected by interfaces, then turns to a discussion of charge and spin transport through and near interfaces and how these can be used to control the properties of the magnetic layer. Important concepts include spin accumulation, spin currents, spin transfer torque, and spin pumping. An overview is provided to the current state of knowledge and existing review literature on interfacial effects such as exchange bias, exchange spring magnets, spin Hall effect, oxide heterostructures, and topological insulators. The article highlights recent discoveries of interface-induced magnetism and non-collinear spin textures, non-linear dynamics including spin torque transfer and magnetization reversal induced by interfaces, and interfacial effects in ultrafast magnetization processes.

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Section: Emergent Magnetism At Interfacesmentioning

confidence: 99%

Interface-induced phenomena in magnetism

et al. 2017

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“…Later, Bychkov and Rashba pointed out that the Rashba term also occurs in quasi-2D systems. 14 These effects have been extensively studied [15][16][17][18][19] and have been observed in various systems such as heterostructures, 20,21 quantum wells (QWs), [22][23][24][25] bulks, [26][27][28] heavy atoms and alloys surfaces, 16,27,[29][30][31][32][33][34][35][36] or nanowires (NWs). [37][38][39] The control of spin-dependent band structure provide with the opportunity to manipulate the spin with potential applications in spintronics.…”

Section: Introductionmentioning

confidence: 99%

Rashba and Dresselhaus Effects in Hybrid Organic–Inorganic Perovskites: From Basics to Devices

et al. 2015

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We use symmetry analysis, density functional theory calculations and k · p modeling to scrutinize Rashba and Dresselhaus effects in hybrid organic-inorganic halide perovskites. These perovskites are at the center of a recent revolution in the field of photovoltaics but have also demonstrated potential for optoelectronic applications such as transistors and light emitters.Due to a large spin-orbit coupling of the most frequently used metals, they are also predicted to offer a promising avenue for spin-based applications. With an in-depth inspection of the electronic structures and bulk lattice symmetries of a variety of systems, we analyse the origin of the spin splitting in two-and three-dimensional hybrid perovskites. It is shown that low-dimensional nanostructures made of CH 3 NH 3 PbX 3 (X=I, Br) lead to spin splittings that can be controlled by an applied electric field. This new findings further open the door for a perovskite-based spintronics.

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“…[10][11][12][13] In the SHE, a spin current is generated in a direction perpendicular to the applied longitudinal charge current flowing in a normal metal (NM) and accumulates spins between FM and NM layers, which exerts a damping-like torque to the magnetization in FM. [16][17][18][19][20] In addition to the spin Hall and Rashba-Edelstein effects, the Oersted field generated by the current in a metallic film is an additional source of driving torque. [16][17][18][19][20] In addition to the spin Hall and Rashba-Edelstein effects, the Oersted field generated by the current in a metallic film is an additional source of driving torque.…”

mentioning

confidence: 99%

Spin‐Orbit Torque Driven Magnetization Switching and Precession by Manipulating Thickness of CoFeB/W Heterostructures

Kim

Chun

Yoon

et al. 2020

Adv Elect Materials

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has been proposed to facilitate the electrical manipulation of magnetization switching for magnetic random access memory and magnetic logic devices by using these toques. [2][3][4][5][6] Moreover, an oscillation and precessional motion by SOT can be a candidate for various types of oscillators. [7][8][9] The spin Hall effect (SHE) and the Rashba-Edelstein interaction are expected to be the main mechanisms of the current-induced SOT, where the two main constituents are the damping-like torque and field-like torque. [10][11][12][13] In the SHE, a spin current is generated in a direction perpendicular to the applied longitudinal charge current flowing in a normal metal (NM) and accumulates spins between FM and NM layers, which exerts a damping-like torque to the magnetization in FM. [14,15] In the Rashba-Edelstein effect, which is caused by the broken space inversion symmetry at the interface, spin accumulation is generated in a direction transverse to the charge current direction in the film plane, which exerts a torque on the magnetization in a ferromagnet (FM). [16][17][18][19][20] In addition to the spin Hall and Rashba-Edelstein effects, the Oersted field generated by the current in a metallic film is an additional source of driving torque. [21,22] In a perpendicular magnetic anisotropy (PMA) structure, these torques generated from a nano-second electric pulse switch the magnetization by a domain wall motion. [23][24][25] It is known that the in-plane magnetic tunnel junction (MTJ) device by a spin transfer torque does not need an external field but takes a relatively long time for the switch due to an incubation time. [26,27] But, recently, researchers demonstrated an in-plane MTJ device by SOT showing a fast deterministic switching at a low current density. [28][29][30][31][32] This in-plane device offers various possibilities in application so that more intensive study is needed.In this work, we investigated the new aspect of in-plane SOT device depending on the amplitudes of damping-like torque, field-like torque, the Oersted field torque and demagnetization torque by a macro spin simulation. We found that the switching, oscillation, and precession could occur in the same heterostructure like W/CoFeB by using the change of the torque ratio with different NM and FM thicknesses. In addition, we constructed the dynamic map as a function of the efficiency of each torque. The expansion and the shrinkage of the switching region are reflected in the map depending on the current density.The switching of magnetization via spin-orbit torque has attracted much attention because of its fast switching and low power consumption. Numerous studies have focused on increasing the conversion efficiency from charge to spin current and out-of-plane magnetization cases. Recently, there have been reports on the fast and deterministic switching of in-plane magnetization devices. It is reported that an in-plane spin-orbit torque (SOT) device can archive the oscillation, precession, and direct switching by a combination of torques-c...

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Focus on the Rashba effect

Cited by 223 publications

References 91 publications

Interface-induced phenomena in magnetism

Interface-induced phenomena in magnetism

Rashba and Dresselhaus Effects in Hybrid Organic–Inorganic Perovskites: From Basics to Devices

Spin‐Orbit Torque Driven Magnetization Switching and Precession by Manipulating Thickness of CoFeB/W Heterostructures

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