Manifestation of spin-orbit interaction in tunneling between two-dimensional electron layers

Rozhansky, I. V.; Аверкиев, Н. С.

doi:10.1103/physrevb.77.115309

Cited by 10 publications

(10 citation statements)

References 14 publications

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“…Among systems with locally broken inversion symmetry, we consider a symmetric double-quantum-well structure (DQWS) [16,[19][20][21][22][23][24][25][26][27][28] (illustrated in Fig. 1) in which electronic states can be controlled by changing the composition and the width of the well and barrier layers and by varying the potential with use of the applied electric field and the doping.…”

Section: Introductionmentioning

confidence: 99%

D'yakonov-Perel' spin relaxation in a bilayer with local structural inversion asymmetry

Hayashida

Akera

2020

Phys. Rev. B

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The spin relaxation in the D'yakonov-Perel' mechanism is theoretically studied in a symmetric doublequantum-well structure (DQWS) with an intersubband spin-orbit interaction (SOI) due to the local structural inversion asymmetry and the linear-in-wave-number Dresselhaus SOI. It is found that the spin relaxation rate induced by the intersubband SOI exhibits a suppression with ωτ p in the Lorentzian form of (1 + ω 2 τ 2 p ) −1 , wherē hω is the intersubband energy separation and τ p is the momentum relaxation time. The present Lorentzian suppression leads to a crossover with increasing ωτ p from the D'yakonov-Perel'-type relaxation (the spin relaxation time τ s ∝ τ −1 p ) to the Elliott-Yafet-type relaxation (τ s ∝ τ p ). It is also shown that the spin relaxation rate in the presence of both the linear Dresselhaus SOI and the intersubband SOI is isotropic with respect to the in-plane spin direction in the present DQWS in contrast to a single quantum well exhibiting an in-plane anisotropy.

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Section: Introductionmentioning

confidence: 99%

D'yakonov-Perel' spin relaxation in a bilayer with local structural inversion asymmetry

Hayashida

Akera

2020

Phys. Rev. B

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“…Introducing SOI of Dresselhaus type (the same in both layers) results in a more complex spin structure of the eigenstates in the layers and more rich tunneling pattern as a result of interference between the two SOI contributions. In our previous works we considered electron tunneling between two n-type 2D layers (n-n tunneling) with account for both Rashba and Dreseelhaus contributions and obtained analytical expression for the tunnel-ing current in this general case 6,7 . However, the question why the SOI effects had not been seen in the tunneling experiments remained open.…”

Section: Introductionmentioning

confidence: 99%

Resonant 2D-2D tunneling with account for spin-orbit interaction

Rozhansky,

Averkiev,

Lähderanta

2015

Preprint

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We present a theory of quantum tunneling between 2D layers with account for Rashba and Dresselhaus spin-orbit interaction (SOI) in the layers. Energy and momentum conservation results in a single resonant peak in the tunnel conductance between two 2D layers as has been experimentally observed for two quantum wells (QW) in GaAs/AlGaAs heterostructures. The account for SOI in the layers leads to a complex pattern in the tunneling characteristic with typical features corresponding to SOI energy. For this manifestation of SOI to be observed experimentally the characteristic energy should exceed the resonant broadening related to the particles quantum lifetime in the layers. We perform an accurate analysis of the known experimental data on electron and hole 2D-2D tunneling in AlGaAs/GaAs heterostructures. It appears that for the electron tunneling the manifestation of SOI is difficult to observe, but for the holes tunneling the parameters of the real structures used in the experiments are very close to those required by the resolution criteria. We also consider a new promising candidate for the effect to be observed, that is p-doped SiGe strained heterostructures. The reported parameters of cubic Rashba SOI and quantum lifetime in strained Ge QWs fabricated up to date already match the criteria for observing SOI in 2D-2D heavy holes tunneling. As supported by our calculations small adjustments of the parameters for AlGaAs/GaAs p-type QWs or simply designing a 2D-2D tunneling experiment for SiGe case are very likely to reveal the SOI features in the 2D-2D tunneling.

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“…Calculation of the current using (22) and taking the derivative with respect to V yields the differential magnetotunneling conductance G(V ) shown in Fig. 4.…”

Section: Magneto-tunneling At Finite Biasmentioning

confidence: 99%

“…18,19 In these systems, the requirement of simultaneous energy and momentum conservation for tunneling through an extended barrier leads to resonances in the tunneling conductance as the applied bias and the magnetic field parallel to the barrier are varied. 20 For charge carriers subject to spin-orbit coupling, magneto-tunneling transport has been proposed as a means to measure the spin splitting 21,22 and to generate spin-polarized currents.…”

Section: Introductionmentioning

confidence: 99%

Magnetotunneling spectroscopy of chiral two-dimensional electron systems

Pratley

Zülicke

2013

Phys. Rev. B

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We present a theoretical study of momentum-resolved tunneling between parallel two-dimensional conductors whose charge carriers have a (pseudo-)spin-1/2 degree of freedom that is strongly coupled to their linear orbital momentum. Specific examples are single and bilayer graphene as well as singlelayer molybdenum disulphide. Resonant behavior of the differential tunneling conductance exhibited as a function of an in-plane magnetic field and bias voltage is found to be strongly affected by the (pseudo-)spin structure of the tunneling matrix. We discuss ramifications for the direct measurement of electronic properties such as Fermi surfaces and the dispersion curves. Furthermore, using a graphene double-layer structure as an example, we show how magneto-tunneling transport can be used to measure the pseudo-spin structure of tunnel matrix elements, thus enabling electronic characterization of the barrier material.

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Manifestation of spin-orbit interaction in tunneling between two-dimensional electron layers

Cited by 10 publications

References 14 publications

D'yakonov-Perel' spin relaxation in a bilayer with local structural inversion asymmetry

D'yakonov-Perel' spin relaxation in a bilayer with local structural inversion asymmetry

Resonant 2D-2D tunneling with account for spin-orbit interaction

Magnetotunneling spectroscopy of chiral two-dimensional electron systems

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