Intrinsic superspin Hall current

Linder, Jacob; Amundsen, Morten; Risinggård, Vetle Kjær

doi:10.1103/physrevb.96.094512

Cited by 17 publications

(23 citation statements)

References 26 publications

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“…The intrinsic superspin Hall effect, which we considered in Ref. [41], arises in a magnetic Josephson junction with Rashba spin-orbit interlayers, see Fig. 1.…”

Section: Introduction To the Superspin Hall Effectmentioning

confidence: 97%

“…In Ref. [41], we considered an equilibrium transverse spin current generated by a longitudinal charge supercurrent in a Josephson junction, which we will refer to here as the superspin Hall current. Whereas most studies of spin Hall effects in superconductors consider purely s-wave or quasiparticle effects [30][31][32][33][34][35][36][37][38][39], the superspin Hall current is the result of an interplay between the s-wave condensate of a conventional superconductor and a proximity-induced p-wave condensate.…”

Section: Introductionmentioning

confidence: 99%

“…[40], the superspin Hall current considered in Ref. [41] arises in a magnetic Josephson junction. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [41] we also consider the ballistic limit, rather than the diffusive limit considered in Refs. [31,[37][38][39].…”

Section: Introductionmentioning

confidence: 99%

“…This question was not addressed in Ref. [41], which considered periodic boundary conditions and thus in practice a cylindrical geometry.…”

Section: Introductionmentioning

confidence: 99%

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Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents

Risinggård

Linder

2019

Phys. Rev. B

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A useful experimental signature of the ordinary spin Hall effect is the spin accumulation it produces at the sample edges. The superspin Hall current [Phys. Rev. B 96, 094512 (2017)] is a transverse equilibrium spin current which is induced by a charge supercurrent. We study the superspin Hall current numerically, and find that it does not give rise to a similar edge magnetization. We also predict and numerically confirm the existence of the inverse superspin Hall effect, which produces a transverse charge supercurrent in response to an equilibrium spin current. We verify the existence of the inverse superspin Hall effect both for a spin-polarized charge supercurrent and an exchange spin current, and propose that a φ 0 junction produced by the inverse superspin Hall effect can be used to directly and electrically measure the spin polarization of a charge supercurrent. This provides a possible way to solve the long-standing problem of how to directly detect the spin-polarization of supercurrents carried by triplet Cooper pairs. arXiv:1902.05555v2 [cond-mat.supr-con]

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“…The intrinsic superspin Hall effect, which we considered in Ref. [41], arises in a magnetic Josephson junction with Rashba spin-orbit interlayers, see Fig. 1.…”

Section: Introduction To the Superspin Hall Effectmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

“…[40], the superspin Hall current considered in Ref. [41] arises in a magnetic Josephson junction. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [41] we also consider the ballistic limit, rather than the diffusive limit considered in Refs. [31,[37][38][39].…”

Section: Introductionmentioning

confidence: 99%

“…This question was not addressed in Ref. [41], which considered periodic boundary conditions and thus in practice a cylindrical geometry.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents

Risinggård

Linder

2019

Phys. Rev. B

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Spin supercurrent in two-dimensional superconductors with Rashba spin-orbit interaction

Hiroki

Hamamoto

et al. 2019

Commun Phys

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† These authors contribute equally.Spin current is a central theme in spintronics, and its generation is a keen issue. The spin-polarized current injection from the ferromagnet, spin battery, and spin Hall effect have been used to generate spin current, but Ohmic currents in the normal state are involved in all of these methods. On the other hand, the spin and spin current manipulation by the supercurrent in superconductors is a promising route for dissipationless spintronics. Here we show theoretically that, in two-dimensional superconductors with Rashba spin-orbit interaction, the generation of dissipationless bulk spin current by charge supercurrent becomes highly efficient, exceeding that in normal states in the dilute limit, i.e. when the chemical potential is close to the band edge, although the spin density becomes small there. This result manifests the possibility of creating new spintronic devices with long-range coherence.In spintronics, spin current plays an essential role to transfer the information associated with the spin degrees of freedom. Therefore the generation of spin current is an important issue, and several methods have been proposed and experimentally verified [1]. Various methods, such as the spin polarized current injection from the ferromagnet [2-4], spin battery [5-9], and spin Hall effect [10][11][12][13][14][15][16], have been employed to generate the spin current. It has been proposed also that the spin current second order in the electric field can be generated in noncentrosymmetric systems with spin-orbit interaction [17,18]. The spin currents mentioned above are either carried by itinerant electrons through dissipative electric currents, or by localized magnetic moments through exchange interactions. However, there can also be non-dissipative spin current in itinerant-electron systems. In this case, it is an equilibrium spin current without dissipation [19]. Although such a spin current is detectable according to Sonin [20], it does not contribute to the transport property in a set up where the spin current can flow in and out.On the other hand, superconducting spintronics is an emerging field attracting recent interest [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Although the spin degrees of freedom are usually quenched in singlet superconductors, the triplet component can be finite in noncentrosymmetric superconductors, ferromagnet-superconductor hybrids and Josephson junctions, or odd-parity superconductors, where the spins become (partially) active. Therefore, it is an intriguing issue if one can generate a spin current in superconductors with zero or small dissipation. Actually, the spin supercurrent has been discussed in He3 related to the internal degrees of freedom [39]. Recently, Leurs et al. [40] have reexamined the spin supercurrent in spin-orbit coupled systems, and classified it to the coherent and noncoherent parts, only the latter of which contributes to the continuity equation of the spin density and its gen-eration or manipulation is the focus of sup...

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Boosting spintronics with superconductivity

2021

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Spintronics aims to utilize the spin degree of freedom for energy-efficient, non-volatile memory and logic devices. In this research update, we review state-of-the-art developments and new directions in charge-and spin-based memory/logic with a focus on spintronics and the fascinating potential for superconductivity to boost spin transmission via spin-polarized quasiparticles or triplet Cooper pairs.

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Intrinsic superspin Hall current

Cited by 17 publications

References 26 publications

Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents

Direct and inverse superspin Hall effect in two-dimensional systems: Electrical detection of spin supercurrents

Spin supercurrent in two-dimensional superconductors with Rashba spin-orbit interaction

Boosting spintronics with superconductivity

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