Voltage-Controlled Topological Spin Switch for Ultralow-Energy Computing: Performance Modeling and Benchmarking

Abstract

A voltage-controlled topological-spin switch (vTOPSS) that uses a hybrid topological insulatormagnetic insulator multiferroic is presented that can implement Boolean logic operations with sub-10 aJ energy-per-bit and energy-delay product on the order of 10 −27 Js. The device uses a topological insulator (TI), which has the highest efficiency of conversion of electric field to spin torque yet observed at room temperature, and a low-moment magnetic insulator (MI) that can respond rapidly to a given spin torque. We present the theory of operation of vTOPSS, develop analytic models of its performance metrics, elucidate performance scaling with dimensions and voltage, and benchmark vTOPSS against existing spin-based and CMOS devices. Compared to existing spin-based devices, such as all-spin logic and charge-spin logic, vTOPSS offers 100× lower energy dissipation and (40-100)× lower energy-delay product. With experimental advances and improved material properties, we show that the energy-delay product of vTOPSS can be lowered to 10 −29 Js, competitive against existing CMOS technology. Finally, we establish that interconnect issues that dominate the performance in CMOS logic are relatively less significant for vTOPSS, implying that highly resistive materials can indeed be used to interconnect vTOPSS devices.

Full Antiferroelectric Performance and GMR Effect in Multiferroic La0.75Ba0.25Fe12O19 Ceramic

“…Therefore, the demand for saving huge quantities of energy for big data storage and reducing the medium's temperature becomes imperative. However, from this point of view, it has significance for research on low-energy memory and logic devices, in which the field of spintronics focuses on establishing magnetization control without the need for a magnetic field [2], so that the induced magnetic field can no longer be directly generated, thus enabling the device to have the advantages of being faster, smaller, and ultra-low power consuming [3,4]. Upon this demand, multiferroic materials come into the vision of scientists.…”