摘要:
Magnetic material based on at least one magnetic 3d transition metal element and at least one Group IVA semiconductor element, this material being homogeneous and having a Curie temperature (Tc) of 350 K or higher. Method for the production and uses thereof, especially in spintronics.
摘要:
A method and apparatus for an electronic substrate having a plurality of semiconductor devices is described. A thin film of nanowires is formed on a substrate. The thin film of nanowires is formed to have a sufficient density of nanowires to achieve an operational current level. A plurality of semiconductor regions are defined in the thin film of nanowires. Contacts are formed at the semiconductor device regions to thereby provide electrical connectivity to the plurality of semiconductor devices. Furthermore, various materials for fabricating nanowires, thin films including p-doped nanowires and n-doped nanowires, nanowire heterostructures, light emitting nanowire heterostructures, flow masks for positioning nanowires on substrates, nanowire spraying techniques for depositing nanowires, techniques for reducing or eliminating phonon scattering of electrons in nanowires, and techniques for reducing surface states in nanowires are described.
摘要:
A spin transistor includes a source electrode, a drain electrode, and a gate electrode on a semiconductor substrate. At least one of the source electrode and the drain electrode includes a semiconductor region and a magnetic layer. The semiconductor region is formed in the semiconductor substrate. The magnetic layer is formed on the semiconductor region, and contains a crystalline Heusler alloy containing at least one of cobalt (Co) and iron (Fe). The semiconductor region and the magnetic layer contain the same impurity element.
摘要:
A method and apparatus for an electronic substrate having a plurality of semiconductor devices is described. A thin film of nanowires is formed on a substrate. The thin film of nanowires is formed to have a sufficient density of nanowires to achieve an operational current level. A plurality of semiconductor regions are defined in the thin film of nanowires. Contacts are formed at the semiconductor device regions to thereby provide electrical connectivity to the plurality of semiconductor devices. Furthermore, various materials for fabricating nanowires, thin films including p-doped nanowires and n-doped nanowires, nanowire heterostructures, light emitting nanowire heterostructures, flow masks for positioning nanowires on substrates, nanowire spraying techniques for depositing nanowires, techniques for reducing or eliminating phonon scattering of electrons in nanowires, and techniques for reducing surface states in nanowires are described.
摘要:
A MISFET the channel region of which is a ferromagnetic semi-conductor has a feature that the drain current can be controlled by the gate voltage and a feature that the transfer conductance can be controlled by the relative directions of magnetization in the ferromagnetic channel region and the ferromagnetic source (or the ferromagnetic drain, or both the ferromagnetic source and ferromagnetic drain). As a result, binary information can be stored in the form of the relative magnetization directions, and the relative magnetization directions are electrically detected. If the magnetism is controlled by the electric field effect of the channel region of a ferromagnetic semiconductor, the current needed to rewrite the information can be greatly reduced. Thus, the MISFET can constitute a high-performance non-volatile memory cell suited to high-density integration.
摘要:
A method is for making a spintronic device and may include forming at least one superlattice and at least one electrical contact coupled thereto, with the at least one superlattice including a plurality of groups of layers. Each group of layers may include a plurality of stacked base semiconductor monolayers defining a base semiconductor portion having a crystal lattice, at least one non-semiconductor monolayer constrained within the crystal lattice of adjacent base semiconductor portions, and a spintronic dopant. The spintronic dopant may be constrained within the crystal lattice of the base semiconductor portion by the at least one non-semiconductor monolayer. In some embodiments, the repeating structure of a superlattice may not be needed.
摘要:
A spin injector for use in a microelectronic device such as a field effect transistor (FET) is disclosed. The spin injector includes an array of ferromagnetic elements disposed within a semiconductor. The ferromagnetic elements within the array are arranged and spaced with respect to one another in a close arrangement such that electrons or holes are spin-polarized when passing through. The spin injector may be located above or at least partially within a source region of the FET. A spin injector structure may also be located above or at least partially within the drain region of the FET. The spin injector includes a semiconductor material containing an array of ferromagnetic elements disposed in the semiconductor material, wherein adjacent ferromagnetic elements within the array are separated by a distance within the range between about 1 nm and 100 nm.
摘要:
A long range, periodically ordered array of discrete nano-features (10), such as nano-islands, nano-particles, nano-wires, non-tubes, nano-pores, nano-composition-variations, and nano-device-components, are fabricated by propagation of a self-assembling array or nucleation and growth of periodically aligned nano-features. The propagation may be induced by a laterally or circularly moving heat source, a stationary heat source arranged at an edge of the material to be patterned (12), or a series of sequentially activated heaters or electrodes. Advantageously, the long-range periodic array of nano-features (10) may be utilized as a nano-mask or nano-implant master pattern for nano-fabrication of other nano-structures. In addition, the inventive long-range, periodically ordered arrays of nano-features are useful in a variety of nanoscale applications such as addressable memories or logic devices, ultra-high-density magnetic recording media, magnetic sensors, photonic devices, quantum computing devices, quantum luminescent devices, and efficient catalytic devices.
摘要:
A plurality of nanoparticles are provided. The nanoparticles may have a metal oxide or a semiconductor oxide surface region and a metal or semiconductor core region and/or the nanoparticles may be uniformly doped. The nanoparticles are formed by grinding a bulk material to a powder and then etching the powder in a solution to a desired nanoparticle size.
摘要:
A MISFET the channel region of which is a ferromagnetic semi-conductor has a feature that the drain current can be controlled by the gate voltage and a feature that the transfer conductance can be controlled by the relative directions of magnetization in the ferromagnetic channel region and the ferromagnetic source (or the ferromagnetic drain, or both the ferromagnetic source and ferromagnetic drain). As a result, binary information can be stored in the form of the relative magnetization directions, and the relative magnetization directions are electrically detected. If the magnetism is controlled by the electric field effect of the channel region of a ferromagnetic semiconductor, the current needed to rewrite the information can be greatly reduced. Thus, the MISFET can constitute a high-performance non-volatile memory cell suited to high-density integration.