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Researchers from Intel Corporation recently proposed "Magneto-Electric SpinOrbit (MESO)" logic as a new strategy for beyond-CMOS electronics [1]. TheIntel researchers project that this concept has the potential to reduce theswitching energy per bit "to near thermodynamic limits for GHz logic (100 kTswitching at 100 ps delay)", i.e., to near 0.4 aJ. Here I point out that theswitching energy stated in ref. [1] is incorrect, because the paper neglects alarge energy cost associated with Ohmic dissipation that is unavoidable withinthe MESO scheme. Using optimistic parameters, the true minimum switching energyper bit within the MESO approach is at least 150 fJ, or more than 300,000 timesgreater than the value stated in ref. [1]. Given this large energy cost, theMESO concept is not a viable strategy for beyond-CMOS logic.

Comment on "Spin-Orbit Logic with Magnetoelectric Nodes: A Scalable Charge Mediated Nonvolatile Spintronic Logic" (arXiv:1512.05428)