  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.
