Effect of flash lamp annealing and laser spike annealing on random dopant fluctuation of 15-nm metal-oxide-semiconductor devices.

Comparison of two different implantation processing techniques for random dopant (RD)-induced threshold voltage fluctuation (sigmaV(th)) in 15-nm metal-oxide-semiconductor (MOS) devices is reported. Implantations of flash lamp annealing and laser spike annealing are simulated using a kinetic Monte Carlo (KMC) technique. The KMC generated distributions are mapped into device channel for three-dimensional quantum mechanical transport simulation to estimate threshold voltage fluctuation.

Spin Hall effect on edge magnetization and electric conductance of a 2D semiconductor strip.

The intrinsic spin Hall effect on spin accumulation and electric conductance in a diffusive regime of a 2D electron gas has been studied for a 2D strip of a finite width. It is shown that the spin polarization near the flanks of the strip, as well as the electric current in the longitudinal direction, exhibit damped oscillations as a function of the width and strength of the Dresselhaus spin-orbit interaction. Cubic terms of this interaction are crucial for spin accumulation near the edges.

Strain-induced coupling of spin current to nanomechanical oscillations.

We propose a setup which allows us to couple the electron spin degree of freedom to the mechanical motions of a nanomechanical system not involving any of the ferromagnetic components. The proposed method employs the strain-induced spin-orbit interaction of electrons in narrow gap semiconductors. We have shown how this method can be used for detection and manipulation of the spin flow through a suspended rod in a nanomechanical device.

Terahertz conductivity and possible BLOCH gain in semiconductor superlattices.

We have investigated terahertz emission due to dynamical electron transport in wide-miniband GaAs/Al(0.3)Ga0.7As superlattices.

Opto-thermionic refrigeration in semiconductor heterostructures.

Combining the ideas of laser cooling and thermionic cooling, we have proposed an opto-thermionic cooling process, and investigated its cooling effect caused by the light emission from a quantum well embedded into a semiconductor pn junction. For a GaAs/AlGaAs opto-thermionic refrigerator in which the Auger recombination is the major nonradiative process, cooling can be achieved in a finite range of bias voltage. Using the measured values of the Auger coefficient, our calculated cooling rate is at least several watts/cm(2).