Narrow quantum rings with general Rashba and Dresselhaus spin-orbit interactions

Lia, J.M.; Tamborenea, P. I.

doi:10.1016/j.physe.2020.114419

Cited by 13 publications

(3 citation statements)

References 36 publications

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“…Additionally, the understanding of quantum phenomena associated to coherent transport can pave the way to enhance and improve the sensibility of nanometer-sized devices [12]. A common ingredient here is the role played by Abelian and non-Abelian phases produced by the carriers' spin dynamics under the action of magnetic textures originating from either (i) purely magnetic sources, such as micromagnetic arrays leading to inhomogeneous Zeeman coupling [13][14][15][16], (ii) purely electric sources, leading to spin-orbit interaction such as Rashba or Dresselhaus coupling [17,18], or (iii) hybrid sources, combining magnetic and spin-orbit fields [19,20].…”

Section: Introductionmentioning

confidence: 99%

Quantum network approach to spin interferometry driven by Abelian and non-Abelian fields

et al. 2021

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We present a theory of conducting quantum networks that accounts for Abelian and non-Abelian fields acting on spin carriers. We apply this approach to model the conductance of mesoscopic spin interferometers of different geometry (such as squares and rings), reproducing recent experimental findings in nanostructured InAsGa quantum wells subject to Rashba spin-orbit and Zeeman fields (as, e.g., the manipulation of Aharonov-Casher interference patterns by geometric means). Moreover, by introducing an additional field-texture engineering, we manage to single out a previously unnoticed spin-phase suppression mechanism. We notice that our approach can also be used for the study of complex networks and the spectral properties of closed systems.

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Section: Introductionmentioning

confidence: 99%

Quantum network approach to spin interferometry driven by Abelian and non-Abelian fields

et al. 2021

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“…The cases of Rashba [6] and Dresselhaus [001] [7] SOC in zincblende III-V compound semiconductor quantum wells have been discussed extensively in the literature over the last decades. Although they belong to different symmetry classes, both Rashba and Dresselhaus [001] SOC present in-plane effective field textures exploited in, e.g., Aharonov-Casher (AC) spin interferometry [8][9][10][11][12][13][14][15][16][17][18][19][20] and the manipulation of geometric spin phases in electronic transport [11,17,[21][22][23] by electrical control of the corresponding SOC strengths [18,24,25]. By contrast, Dresselhaus [110] (D110) SOC [7] has received relatively little attention (with some notable exceptions [1,4,[26][27][28][29][30][31][32]).…”

Section: Introductionmentioning

confidence: 99%

Magnetic switching of spin-scattering centers in Dresselhaus [110] circuits

Rodríguez,

Reynoso,

Baltanás

et al. 2024

Phys. Rev. B

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Spin carriers subject to Dresselhaus [110] (D110) spin-orbit coupling (SOC) gather null spin phases in closed circuits, contrary to usual Rashba and Dresselhaus [001] SOC. We show that D110 spin phases can be activated in square circuits by introducing an in-plane Zeeman field, where localized field inhomogeneities act as effective spin-scattering centers. Our simulations show rich interference patterns in the quantum conductance, which work as maps for a geometric classification of the propagating spin states. We also find that disorder facilitates low-field implementations.

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“…For instance, Khordad [21], Zamani et al [22][23][24], and Pourmand and Rezaei [25] investigated the influence of SOI on different nonlinear optical responses of QRs, considering contributions from RI and DI. More recently, Bejan and Stan studied electron spin and donor impurity effects on light absorption in QRs under magnetic fields [26], while Lia and Tamborenea reported on general RI and DI in narrow QRs [27].…”

Section: Introductionmentioning

confidence: 99%

Elliptical Quantum Rings with Variable Heights and under Spin–Orbit Interactions

Mora-Ramos,

Vinasco,

Radu

et al. 2023

Condensed Matter

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We investigate the electronic properties of a semiconductor quantum ring with an elliptical shape and non-uniform height, allowing for distributed quantum-dot-like bulges along its perimeter. The adiabatic approximation and the finite element method are combined to calculate the allowed electron states in the structure under the effective mass approximation, considering the contributions from Rashba and Dresselahaus spin–orbit interactions and the Zeeman effect in the presence of an applied magnetic field. We discuss the features of the calculated spectra for two different ring geometries: a symmetric one with four dot-like bulges, and an asymmetric one with three hilled protuberances. The information about those states allows us to evaluate the linear optical absorption response associated with interlevel transitions between the ground and lowest excited states. This phenomenon takes place at resonant energies of only a few milielectronvolts. It is observed that spin–orbit interactions tend to quench this response under zero-field conditions in the case of symmetric confinement.

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Narrow quantum rings with general Rashba and Dresselhaus spin-orbit interactions

Cited by 13 publications

References 36 publications

Quantum network approach to spin interferometry driven by Abelian and non-Abelian fields

Quantum network approach to spin interferometry driven by Abelian and non-Abelian fields

Magnetic switching of spin-scattering centers in Dresselhaus [110] circuits

Elliptical Quantum Rings with Variable Heights and under Spin–Orbit Interactions

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