Power Dissipation in Spintronic Devices Out of Thermodynamic Equilibrium |
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| Authors: | Dmitri E Nikonov George I Bourianoff Paolo A Gargini |
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| Affiliation: | (1) Technology Strategy, Technology and Manufacturing Group, Intel Corp., 2200 Mission College Blvd., Santa Clara, California 95052, USA |
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| Abstract: | Quantum limits of power dissipation in spintronic computing are estimated. A computing element composed of a single electron
in a quantum dot is considered. Dynamics of its spin due to external magnetic field and interaction with adjacent dots are
described via the Bloch equations. Spin relaxation due to magnetic noise from various sources is described as coupling to
a reservoir. Resulting dissipation of energy is calculated and is shown to be much less than the thermal limit, ∼kT per bit,
if the rate of spin relaxation is much slower than the switching rate. Clues on how to engineer an energy efficient spintronic
device are provided. |
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| Keywords: | computation theory heat dissipation quantum theory relaxation processes magnetic noise spintronics |
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