Enhanced longevity of the spin helix in low-symmetry quantum wells

Iizasa, Daisuke; Kohda, Makoto; Zülicke, U.; Nitta, Junsaku; Kammermeier, Michael

doi:10.1103/physrevb.101.245417

Cited by 16 publications

(6 citation statements)

References 66 publications

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“…It is until recently that attention has been paid to a general crystal orientation [35][36][37]. It was found that the recovery of the SU(2) symmetry can be realized for some growth direction Miller indices, with consequences like the transition from weak anti-localization to weak localization [35] or lifetime enhancement of spin helices [38]. Recently, the optical generation of dc spin currents by second-order nonlinear interactions in 2DEGs with SO coupling has also been explored [30,39].…”

Section: Introductionmentioning

confidence: 99%

Linear and nonlinear spin current response in anisotropic spin-orbit coupled systems

Muñoz-Santana¹,

Maytorena²

2023

Preprint

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Section: Introductionmentioning

confidence: 99%

Linear and nonlinear spin current response in anisotropic spin-orbit coupled systems

Muñoz-Santana¹,

Maytorena²

2023

Preprint

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“…Interestingly, in the 𝒑-linear regime, and as long as the values of the Rashba and Dresselhaus coupling strengths are set equal [20], a strong suppression of the spin relaxation can be attained, leading to the realization of the persistent spin helix phenomenon. It has been also established that the precise control of the spin state, along with the relative directions of the Rashba and both linear and non-linear Dresselhaus SOC fields are crucial for stability of a persistent spin helix state [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Impact of the p-cubic Dresselhaus term on the spin Hall effect

Santana-Suárez¹,

Mireles²

2023

Condens. Matter Phys.

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It is well known that the Dresselhaus spin-orbit coupling (SOC) in semiconductor two dimensional electron gases (2DEGs) possesses both linear and cubic in momentum contributions. Nevertheless, the latter is usually neglected in most theoretical studies. However, recent Kerr rotation experiments have revealed a significant enhancement of the cubic Dresselhaus interaction by increasing the drift velocities in 2DEGs hosted in GaAs quantum wells. Here, we present a study of the optical spin Hall conductivity in 2DEGs under the simultaneous presence of Rashba and (linear plus cubic) Dresselhaus SOC. The work was done within the Kubo formalism in linear response. We show that the coexistence of the Rashba and cubic Dresselhaus SOC in 2DEGs promotes a strong anisotropy of the band spin splitting which in turn leads to a very characteristic frequency dependence of the spin Hall conductivity. We find that the spin Hall conductivity response could be very sensible to sizeable cubic-Dresselhaus coupling strength. This may be of relevance for the optical control of spin currents in 2DEGs with non-negligible cubic-Dresselhaus SOC.

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“…By combining these two interactions, we can control the spin polarization of conduction electrons in a way that is dependent on the propagation direction 18 . In fact, electron transport reflecting the spin texture on the Fermi surface has been observed through, e.g., the Aharonov-Casher effect [19][20][21][22][23][24] and the persistent spin helix state [25][26][27][28][29][30][31] .…”

Section: Introductionmentioning

confidence: 99%

Spin pumping of two-dimensional electron gas with Rashba and Dresselhaus spin-orbit interactions

Yama,

Tatsuno,

Kato

et al. 2021

Preprint

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We theoretically consider spin pumping in a junction between a ferromagnetic insulator (FI) and a two-dimensional electron gas (2DEG) in which the Rashba and Dresselhaus spin-orbit interactions coexist. Using second-order perturbation theory, we derive an increase in linewidth in the case of an interfacial exchange coupling in a ferromagnetic resonance (FMR) experiment. We clarify how the enhancement of Gilbert damping depends on the resonant frequency and spin orientation of the FI. We show that this setup of an FMR experiment can provide information on the spin texture of 2DEG at the Fermi surface.

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Enhanced longevity of the spin helix in low-symmetry quantum wells

Cited by 16 publications

References 66 publications

Linear and nonlinear spin current response in anisotropic spin-orbit coupled systems

Linear and nonlinear spin current response in anisotropic spin-orbit coupled systems

Impact of the p-cubic Dresselhaus term on the spin Hall effect

Spin pumping of two-dimensional electron gas with Rashba and Dresselhaus spin-orbit interactions

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