Journal ArticleDOI
Electronic analog of the electro‐optic modulator
Supriyo Datta,Biswajit Das +1 more
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TLDR
In this article, an electron wave analog of the electro-optic light modulator is proposed, where magnetized contacts are used to preferentially inject and detect specific spin orientations.Abstract:
We propose an electron wave analog of the electro‐optic light modulator. The current modulation in the proposed structure arises from spin precession due to the spin‐orbit coupling in narrow‐gap semiconductors, while magnetized contacts are used to preferentially inject and detect specific spin orientations. This structure may exhibit significant current modulation despite multiple modes, elevated temperatures, or a large applied bias.read more
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Non-DMS related ferromagnetism in transition metal doped zinc oxide
Kay Potzger,Shengqiang Zhou +1 more
TL;DR: In this article, the authors review pitfalls in recent efforts to make a conventional semiconductor, namely ZnO, ferromagnetic by means of doping with transition metal ions, and show that there are manifold sources for ferromagnetism in this material which can easily be confused with the formation of a ferromaagnetic diluted magnetic semiconductor (DMS).
Journal ArticleDOI
Intrinsic ferromagnetism with high temperature, strong anisotropy and controllable magnetization in the CrX (X = P, As) monolayer
TL;DR: Using DFT and Monte Carlo simulations, the possibility of realizing intrinsic ferromagnetism in 2D monolayer CrX (X = P, As) is demonstrated, which offers an ideal platform for realizing 2D magnetoelectric devices such as spin-FETs in spintronics.
Journal ArticleDOI
Electric Control of Fermi Arc Spin Transport in Individual Topological Semimetal Nanowires.
Ben-Chuan Lin,Ben-Chuan Lin,Shuo Wang,Shuo Wang,An-Qi Wang,Ying Li,Rongrong Li,Ke Xia,Dapeng Yu,Zhi-Min Liao +9 more
TL;DR: The spin-polarized transport in a Dirac semimetal Cd_{3}As_{2} nanowire employing the ferromagnetic electrodes for spin detection is reported, indicating the topological protection nature of the spin transport.
Journal ArticleDOI
Drift transport of helical spin coherence with tailored spin-orbit interactions.
Yoji Kunihashi,Haruki Sanada,Hideki Gotoh,Koji Onomitsu,Makoto Kohda,Junsaku Nitta,Tetsuomi Sogawa +6 more
TL;DR: The persistentspin helix enhances the spatial coherence of drifting spins, resulting in maximized spin decay length near the persistent spin helix condition within the enhanced distance of the spin transport.
Journal ArticleDOI
Spin filter effects in mesoscopic ring structures
TL;DR: In this article, the spin-dependent conductance of ballistic mesoscopic ring systems in the presence of an inhomogeneous magnetic field was studied and it was shown that a small Zeeman splitting can lead to a considerable spin polarization of the current.
References
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Journal ArticleDOI
Oscillatory effects and the magnetic susceptibility of carriers in inversion layers
TL;DR: In this paper, the spin-orbit interaction Hamiltonian HSO = alpha ( sigma *k) was used to change the usual patterns of B-1-periodic oscillations; some oscillations are strongly suppressed due to the diminishing of the gaps between adjacent levels and new oscillations appear due to intersections of levels.
Journal ArticleDOI
Coupling of electronic charge and spin at a ferromagnetic-paramagnetic metal interface.
Mark Johnson,Robert H. Silsbee +1 more
TL;DR: A new technique to measure conduction electron relaxation times is described, using nonequilibrium magnetization present in a paramagnetic metal can be detected as an open circuit voltage across an interface between the paramagnet and a ferromagnet.
Journal ArticleDOI
Spin splitting in semiconductor heterostructures for B-->0.
TL;DR: This work shows for AlGaAs/GaAs heterostructures how this finite spin splitting at B=0 evolves from the Zeeman splitting for B\ensuremath{
e}0 and predicts a vanishingspin splitting at a finite -magnetic- field \char22{}, which depends on the electron concentration in the inversion layer.
Journal ArticleDOI
On the possibility of transistor action based on quantum interference phenomena
TL;DR: In this article, a theoretical study of quantum interference phenomena in a T-shaped semiconductor structure is presented, and the results resemble the well-known solutions for the electromagnetic field in waveguides with the main difference that penetration of the wave function of the electrons can be controlled by external voltages.
Journal ArticleDOI
Evidence for spin splitting in In x Ga 1-x As/In 0.52 Al 0.48 As heterostructures as B-->0
Biswajit Das,D. C. Miller,Supriyo Datta,Ronald G. Reifenberger,W. P. Hong,P. K. Bhattacharya,Jasprit Singh,M. Jaffe +7 more
TL;DR: In this paper, the splitting in zero magnetic field between the up-and down-spin electrons in a two-dimensional electron gas is obtained for a series of three different modulation-doped heterostructures with high electron densities.