Beating Analysis of Shubnikov de Haas Oscillation in In&lt;sub&gt;0.53&lt;/sub&gt;Ga&lt;sub&gt;0.47&lt;/sub&gt;As Double Quantum Well toward Spin Filter Applications

Koga, Tomohiro; Matsuura, Tetsuya; Faniel, Sébastien; Souma, Satofumi; Mineshige, S.; Sekine, Yoshiaki; Sugiyama, Hiroki

doi:10.1587/transele.e95.c.770

Cited by 2 publications

(5 citation statements)

References 9 publications

(6 reference statements)

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“…6(b) and S2 in the Supplemental Material [36]] and the mobility μ value of the pristine bulk 2DES, respectively. We note that ex ≈ 0.9 μm in the chaos+impurity model is translated to μ ≈ 4 m 2 /Vs of the bulk mobility, which qualitatively agrees with μ ≈ 7.6 m 2 /V s of the pristine bulk 2DES obtained in separate experiments [16,34,35].…”

Section: B Extraction Of Parameters By "Chaos+impurity" Modelsupporting

confidence: 87%

“…To answer these questions, we first refitted the data at V g = 0.85 V (k α = 0 rad/μm) using only k c and L φ as free fitting parameters in the magnetic field range |B| 0.32 mT, but now assuming ex = 1 μm instead of 10 μm as used in the chaos only model. The primary purpose of this first procedure is to obtain a reasonable value of k c , where ex = 1 μm was chosen rather arbitrarily from the bulk transport information (0.1 μm 10 μm) [16,34,35]. The extracted k c value was almost unaffected by small variations of ex around 1 μm, which justifies our rather ad hoc approach chosen here.…”

Section: B Extraction Of Parameters By "Chaos+impurity" Modelmentioning

confidence: 97%

“…IV D) samples in the main text, whose sample names are KH3-1 and KH1-3, respectively. from 1.3 × 10 16 to 2.4 × 10 16 m −2 and from 1.1 to 2.2 μm, respectively, for gate voltages from 0.2 to 1.4 V [16,34,35].…”

Section: A Fabrication and MC Measurement Of Mrasmentioning

confidence: 98%

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Direct extraction of electron parameters from magnetoconductance analysis in mesoscopic ring array structures

et al. 2018

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We report an approach for examining electron properties using information about the shape and size of a nanostructure as a measurement reference. This approach quantifies the spin precession angles per unit length directly by considering the time-reversal interferences on chaotic return trajectories within mesoscopic ring arrays (MRAs). Experimentally, we fabricated MRAs using nanolithography in InGaAs quantum wells which had a gate-controllable spin-orbit interaction (SOI). As a result, we observed an Onsager symmetry related to relativistic magnetic fields, which provided us with indispensable information for the semiclassical billiard ball simulation. Our simulations, developed based on the real-space formalism of the weak localization/antilocalization effect including the degree of freedom for electronic spin, reproduced the experimental magnetoconductivity (MC) curves with high fidelity. The values of five distinct electron parameters (Fermi wavelength, spin precession angles per unit length for two different SOIs, impurity scattering length, and phase coherence length) were thereby extracted from a single MC curve. The methodology developed here is applicable to wide ranges of nanomaterials and devices, providing a diagnostic tool for exotic properties of two-dimensional electron systems.

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Section: B Extraction Of Parameters By "Chaos+impurity" Modelsupporting

confidence: 87%

Section: B Extraction Of Parameters By "Chaos+impurity" Modelmentioning

confidence: 97%

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Direct extraction of electron parameters from magnetoconductance analysis in mesoscopic ring array structures

et al. 2018

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“…The active part of the device consists of a (001) InP lattice-matched In 0.53 Ga 0.47 As=In 0.52 Al 0.48 As DQW [24] with length L in the x direction. Nonmagnetic source and drain electrodes are attached to QW1 after etching away the above layers at both the left and right ends.…”

Section: Device Descriptionmentioning

confidence: 99%

“…In this paper, we utilize the interband Rashba effect in symmetric double quantum wells (DQWs) [14,[19][20][21][22][23] to generate a bulk spin polarization nonmagnetically, adopting In 0.53 Ga 0.47 As=In 0.52 Al 0.48 As DQWs [24] as a specific example. The interband Rashba effect manifests itself in the off-diagonal matrix element in the 2 × 2 quantum well (QW) space using the bonding and antibonding basis [19,20], which connects subbands with distinct parities and hence operates without the usual Rashba coupling [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Spin Blocker Using the Interband Rashba Effect in Symmetric Double Quantum Wells

et al. 2015

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We propose a lateral spin-blockade devicethat uses the interbandRashba effect in a symmetric double quantum well (QW), where the Rashba effect in the conventional sense vanishes because of its inversion symmetry. The interband Rashba effect manifests itself in the off-diagonal term (represented by the parameter η) in the QW space using the bonding and antibonding basis [Esmerindo Bernardes, John Schliemann, Minchul Lee, J. Carlos Egues, and Daniel Loss, Phys. Rev. Lett. 99, 076603 (2007)]. In such a system, spin selection is possible by tuning the device length, gate electric field and in-plane magnetic field. We particularly show illustrative mechanisms using a one-dimensional model with k ¼ ðk F ; 0Þ, where the selected spin can be blocked completely in the presence of the in-plane magnetic field. While the inclusion of the finite k y and/or the gate electric field deteriorates the spin polarization P, finite values remain for P (P > 11%). Our proposal can also be regarded as an effective way of enhancing a variation of the Rashba-Edelstein effect, the generation of bulk spin polarization by electric current, based on semiconductor band engineering technology.

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Beating Analysis of Shubnikov de Haas Oscillation in In<sub>0.53</sub>Ga<sub>0.47</sub>As Double Quantum Well toward Spin Filter Applications

Cited by 2 publications

References 9 publications

Direct extraction of electron parameters from magnetoconductance analysis in mesoscopic ring array structures

Direct extraction of electron parameters from magnetoconductance analysis in mesoscopic ring array structures

Spin Blocker Using the Interband Rashba Effect in Symmetric Double Quantum Wells

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