Toward Spin Electronic Devices Based on Semiconductor Nanowires

Luryi, Serge; Xu, Jimmy; Zaslavsky, Alexander

doi:10.1002/9781118678107.ch25

Cited by 3 publications

(6 citation statements)

References 34 publications

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“…III A 1, depending on the SOC parameters the quantum tube allows for two distinct scenarios, (i) and (ii), of PSH symmetry [Eqs. (30) and (31), respectively]. In both situations, we find that certain inter-subband matrix elements of v z disappear, that is, if…”

Section: B Distinctive Features Of the Spin Conservation In The Optic...mentioning

confidence: 95%

“…The cases (i) and (ii) correspond to the PSH symmetries [Eqs. (30) and (31)], where at a fixed Fermi energy the spin states in every subband have the same spin orientation. In scenario (ii), the k z -dependence of ξ yields slight fluctuations of the local spin orientation.…”

Section: Quantum Tubementioning

confidence: 99%

“…[22][23][24][25] Nanowires constitute a building block for future generation spintronic and electronic devices with novel functionalities and far-reaching applications. [26][27][28][29][30][31][32][33][34][35][36] Modern growth techniques facilitate customization of the structural properties such as morphology, crystal orientation, and even the crystal structure. [37][38][39][40][41][42][43] In particular, the possibility to find conventional zinc-blende compound semiconductors in the wurtzite phase has attracted tremendous attention as it allows to fabricate narrow-gap materials with large SOC coefficients but the distinct SOC structure of the wurtzite lattice.…”

Section: Introductionmentioning

confidence: 99%

“…(34), for positive (negative) j and kz. Figures (a-b,iv) and (a-b,i) correspond to the PSH cases (i) and (ii) [Eqs (30). and (31)], respectively.…”

mentioning

confidence: 99%

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Persistent spin textures and currents in wurtzite nanowire-based quantum structures

Kammermeier,

Seith,

Wenk

et al. 2020

Preprint

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We explore the spin and charge properties of electrons in wurtzite semiconductor nanowires where radial and axial confinement leads to tubular or ring-shaped quantum structures. Accounting for spin-orbit interaction induced by the wurtzite lattice as well as a radial potential gradient, we analytically derive the corresponding low-dimensional Hamiltonians. It is demonstrated that the resulting tubular spin-orbit Hamiltonian allows to construct spin states that are persistent in time and robust against disorder. We find that these special scenarios are characterized by distinctive features in the optical conductivity spectrum, which enable an unambiguous experimental verification. In both types of quantum structures, we discuss the dependence of the occurring persistent charge and spin currents on an axial magnetic field and Fermi energy which show clear fingerprints of the electronic subband structure. Here, the spin-preserving symmetries become manifest in the vanishing of certain spin current tensor components. Our analytic description relates the distinctive features of the optical conductivity and persistent currents to bandstructure characteristics which allows to deduce spin-orbit coefficients and other band parameters from measurements.

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Section: B Distinctive Features Of the Spin Conservation In The Optic...mentioning

confidence: 95%

Section: Quantum Tubementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…(34), for positive (negative) j and kz. Figures (a-b,iv) and (a-b,i) correspond to the PSH cases (i) and (ii) [Eqs (30). and (31)], respectively.…”

mentioning

confidence: 99%

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Persistent spin textures and currents in wurtzite nanowire-based quantum structures

Kammermeier,

Seith,

Wenk

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…1 Aside from being the essential cornerstone for several fundamental discoveries, 2-5 they will constitute a key element in the realization of future electronic and spintronic devices. [6][7][8][9][10][11][12][13][14] To support this technical progress, a sound knowledge and reliable control of the system's transport parameters, the spin-orbit coupling (SOC), and the spin relaxation are essential.…”

Section: Introductionmentioning

confidence: 99%

Spin relaxation in wurtzite nanowires

et al. 2018

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We theoretically investigate the D'yakonov-Perel' spin relaxation properties in diffusive wurtzite semiconductor nanowires and their impact on the quantum correction to the conductivity. Although the lifetime of the long-lived spin states is limited by the dominant k-linear spin-orbit contributions in the bulk, these terms show almost no effect in the finite-size nanowires. Here, the spin lifetime is essentially determined by the small k-cubic spin-orbit terms and nearly independent of the wire radius. At the same time, these states possess in general a complex helical structure in real space that is modulated by the spin precession length induced by the k-linear terms. For this reason, the experimentally detected spin relaxation largely depends on the ratio between the nanowire radius and the spin precession length as well as the type of measurement. In particular, it is shown that while a variation of the radius hardly affects the magnetoconductance correction, which is governed by the long-lived spin states, the change in the spin lifetime observed in optical experiments can be dramatic. We compare our results with recent experimental studies on wurtzite InAs nanowires.

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Polychromatic emission in a wide energy range from InP-InAs-InP multi-shell nanowires

et al. 2019

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InP-InAs-InP multi-shell nanowires (NWs) were grown in the wurtzite or zincblende crystal phase and their photoluminescence (PL) properties were investigated at low temperature (≈6K) for different measurement geometries. PL emissions from the NWs were carefully studied in a wide energy range from 0.7 eV to 1.6 eV. The different features observed in the PL spectra for increasing energies are attributed to four distinct emitting domains of these nano-heterostructures: the InAs island (axially grown), the thin InAs capping shell (radially grown), the crystal-phase quantum disks arising from the coexistence of InP zincblende and wurtzite segments in the same NW, and the InP portions of the NW. These results provide a useful frame for the rational implementation of InP-InAs-InP multishell NWs containing various quantum confined domains as polychromatic optically active components in nanodevices for quantum information and communication technologies.

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Toward Spin Electronic Devices Based on Semiconductor Nanowires

Cited by 3 publications

References 34 publications

Persistent spin textures and currents in wurtzite nanowire-based quantum structures

Persistent spin textures and currents in wurtzite nanowire-based quantum structures

Spin relaxation in wurtzite nanowires

Polychromatic emission in a wide energy range from InP-InAs-InP multi-shell nanowires

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