Spintronic Devices Come A Stage Closer
As computers become more powerful,their designers face a problem with the design of the chips. To pack more features on the chip make them interact faster they must become smaller and as the density increases they require more power to move the electrons which represent the states 1 and 0. The switching also produces a lot of heat which must be removed.
The solution to this problem could be spintronics. Instead of switching using the flow or absence of electronic charge, the state of the individual gate could be determined by the spin of the electron.
Spin is a intrinsic property of the electron like charge. It is helpful to think about electron spin being like a top spinning about its axis. It can spin clockwise or anticlockwise. Spin in an electron can be characterised as being either spin up or spin down and so we can consider one spin state to represent a one and the opposing state to represent zero.
However, in order to measure the states and keep them in the state you left them it is necessary to operate the devices at low temperature. The current research has shown for the first time that the electron spins can be detected and manipulated at room temperature. An additional benefit is that this has been done using existing Silicon technology, which is already used in the fabrication of conventional microchip devices.
It remains unclear whether spintronics can overcome the problem of heating found in conventional electronic devices as the feature density increases.
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