Patent ID: 8048684

Claim:
A method of manipulating a spin quantum state through dipole polarization switching using a structure comprising a hybrid double quantum disk structure, which is provided in a semiconductor nanorod or nanowire and is composed of a diluted magnetic semiconductor disk disposed in a predetermined portion of one side region thereof and a ferroelectric compound semiconductor disk disposed in a predetermined portion of the other side region thereof, the diluted magnetic semiconductor disk and the ferroelectric compound semiconductor disk being spaced apart from each other at a predetermined interval, said method comprising: changing a dipole direction of the ferroelectric compound semiconductor at fixed bias voltage to transfer a spin-up state of the ferroelectric compound semiconductor into a diluted magnetic semiconductor; restoring the dipole direction, to combine the spin-up state again into the ferroelectric compound semiconductor disk; and controlling spin separation by reversing dipole polarization of the ferroelectric compound semiconductor disk, but without bias voltage.