A Coaxial Spin Injection Device

Abstract

The invention relates to a coaxial spin injection device, which comprises n coaxial spin injection electrodes, n fixed electrodes and a substrate of loading a structure, wherein the n coaxial spin injection electrodes are arranged on a one-dimensional material at intervals; the n fixed electrodes are connected with the coaxial spin injection electrodes; and each coaxial spin injection electrode comprises a coaxial tunneling layer, a coaxial ferromagnetic layer and a coaxial coating layer which sequentially surround the outside of a one-dimensional cylindrical spin channel. By adopting the spin injection electrodes which coaxially surround a one-dimensional material spin channel, direct contact of the spin channel in a coverage area of the spin injection electrodes and the substrate is avoided; an electron scattering problem caused by a contact surface is reduced; and the spin injection efficiency is effectively improved. According to the spin injection electrodes which coaxially surround the one-dimensional material spin channel provided by the invention, so that the problem that a hole exists in the contact surface of a traditional injection electrode / spin channel caused by a special hollow cylindrical structure of the one-dimensional material is solved and the controllability and the reliability of the spin injection device are improved.

Description

technical field [0001] The invention relates to a coaxial spin injection device, which is mainly composed of a one-dimensional spin transmission channel, a tunneling layer coaxially surrounding the spin channel, and a ferromagnetic electrode. The spin injection belongs to the field of spin electronic devices. Background technique [0002] With the development of spintronics, spin injection becomes an increasingly important technique. When the current passes through the lateral spin valve composed of ferromagnetic electrode / tunneling layer / spin channel / tunneling layer / ferromagnetic electrode, since the probability of electrons passing through the ferromagnetic electrode and the tunneling layer will depend on its spin direction, Therefore, by controlling the magnetization direction of the ferromagnetic electrode and selecting an appropriate tunneling layer, electrons with a specific spin direction can be injected into the spin channel to realize spin accumulation. Furthermor...

AI Technical Summary

Problems solved by technology

[0004] In traditional spin injection devices, due to the direct contact between the spin channel material (such as graphene, carbon nanotubes, etc.) and the substrate at the spin injection electrode, it causes additional electron scattering problems and reduces the spin injection. efficiency

At the same time, for the case of one-dimensional materials such as carbon nanotubes, due to their unique hollow cylindrical topological structure, holes are easily generated on the contact surface between the spin injection electrode and the carbon nanotube, resulting in the effective contact area between the spin injection electrode and the channel. uncontrollable

[0005] In order to solve the above problems, the present invention proposes a coaxial spin injection device. The spin injection electrode of the device coaxially surrounds the one-dimensional spin channel, which can effectively solve the problem caused by the contact between the one-dimensional spin channel and the substrate. The scattering problem of the spin injection electrode / one-dimensional spin channel interface is also avoided, and the spin injection efficiency is effectively improved.

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