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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Journal ArticleDOI
Effects of defects and doping on wide band gap ferromagnetic semiconductors
Stephen J. Pearton,C. R. Abernathy,G. T. Thaler,R. M. Frazier,Fan Ren,Arthur F. Hebard,Y. D. Park,David P. Norton,W. Tang,Michael Stavola,J. M. Zavada,Robert G. Wilson +11 more
TL;DR: In this article, the authors review progress in wide band gap ferromagnetic semiconductors and the role of defects and doping on the resulting magnetic properties and show that defects can significantly degrade the magnetic properties.
Journal ArticleDOI
Rashba split surface states in BiTeBr
TL;DR: In this article, the bulk band structure and surface states of BiTeBr were studied within density functional theory and both ordered and disordered phases, which differ in atomic order in the Te-Br sublattice.
Journal ArticleDOI
Spin orientation and sign of the Rashba splitting in Bi/Cu(111)
Hendrik Bentmann,Takuya Kuzumaki,Gustav Bihlmayer,Stefan Blügel,Eugene V. Chulkov,Eugene V. Chulkov,F. Reinert,F. Reinert,Kazuyuki Sakamoto +8 more
TL;DR: In this article, the authors investigated the microscopic origin of the Rashba spin splitting by spin-resolved photoemission experiments and first-principles calculations on the strongly spin-orbit coupled surface states in Bi/Cu(111).
Journal ArticleDOI
Spin-orbital effects in magnetized quantum wires and spin chains
TL;DR: In this article, an interesting interplay of Zeeman and spin-orbit terms, facilitated by the electron-electron interaction, results in the spin density wave (SDW) state when the magnetic field and spinorbit axes are orthogonal.
Journal ArticleDOI
Growth and properties of super-doped Si : Mn for spin-photonics
TL;DR: In this paper, a gas-source molecular beam epitaxy technique was used to grow super-doped Si:Mn at low substrate temperatures as low as 300°C by using photo-thermal excitation molecular beam cells developed in this study.
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.
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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.