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Simulated 2D circuits use quasi-particles

Instead of the three-dimensional bridge constructions in chips as switch elements, physicists at the University of Kaiserslautern use specific quasi-particles, referred to as magnons, that are only connected two-dimensionally.

13 Feb. 2018
HMI-ID01-092ra_AG Hillebrands
Simulated 2D circuits use quasi-particles (Chart: AG Hillebrands)

Spin waves transport information in the form of intrinsic angular momentum into magnetic materials. The quasi-particles of these waves are magnons. Compared with electrons, they can transmit much more information, yet they use much less energy and generate less waste heat.

First described by Qi Wang and colleagues, the integrated magnon circuit uses the following phenomenon: When two magnon conductors are placed extremely closely together, the energy of the waves will be transferred from one conductor to the next. This yields a new wiring method suitable for junctions without any three-dimensional bridge construction. The researchers refer to the connection point as a directional coupler. In future computer components, this will allow cost and material savings. In addition, the size of the simulated components is within the nanometer regime, which is comparable to modern chips. However, the information density using magnons is significantly greater.

The complete research report "Reconfigurable nanoscale spin-wave directional coupler" is available as full text in Open Access from Science Advances .