Skyrmion based microwave detectors and harvesting

TL;DR

This paper proposes a skyrmion-based magnetic tunnel junction microwave detector with high sensitivity, enabling ultralow-power detection and harvesting of microwave signals using topologically protected magnetic states.

Contribution

It introduces a novel skyrmion ground state in a spin-transfer torque diode, achieving sensitivities over 2000 V/W, advancing ultralow-power microwave detection technology.

Findings

Sensitivity exceeds 2000 V/W for optimized contact sizes

Skyrmion ground state enables high detection efficiency

Potential for new class of spin-torque diodes with non-uniform ground states

Abstract

Magnetic skyrmions are topologically protected states that are very promising for the design of the next generation of ultralow-power electronic devices. In this letter, we propose a magnetic tunnel junction based spin-transfer torque diode with a magnetic skyrmion as ground state and a perpendicular polarizer patterned as nanocontact for a local injection of the current. The key result is the possibility to achieve sensitivities (i.e. detection voltage over input microwave power) larger than 2000V/W for optimized contact diameters. Our results can be very useful for the identification of a new class of spin-torque diodes with a non-uniform ground state.