Exploring Spin Dynamics for Post-Moore Microelectronics with Exascale Modeling

The post-Moore's law era has seen unprecedented prosperity of electronic microdevices harnessing novel wave-material interactions beyond conventional single-phase materials. However, gaining an in-depth understanding of the interaction between the waves and materials has been difficult because of the inherent disparity in time and length scale and the lack of effective modeling techniques.

To address these challenges, we have developed scalable simulation tools to enable leadership computing systems to model emerging post-CMOS microelectronic devices (electronic, spintronic, nanomagnetic and nanomechanical). Our exascale, open-source code, ARTEMIS (Adaptive mesh Refinement Time-domain ElectrodynaMIcs Solver), contains support for heterogeneous physical coupling. It is portable and scales well on many-core/GPU-based supercomputers that are far beyond the reach of commercial tools, allowing us to capture larger-scale spatial disparities inherent to realistic circuits. We have demonstrated algorithmic flexibility by developing a micromagnetics module. Our current efforts include upgrading the functionality of ARTEMIS to accurately describe new devices such as a magnetoelectric spin-orbit logic, enabling ARTEMIS to serve as the device-level design and optimization tool.