Kavli Affiliate: Darrell G. Schlom
| First 5 Authors: Sajid Husain, Maya Ramesh, Xinyan Li, Sergei Prokhorenko, Shashank Kumar Ojha
| Summary:
Since Felix Bloch’s introduction of the concept of spin waves in 1930,
magnons (the quanta of spin waves) have been extensively studied in a range of
materials for spintronics, particularly for non-volatile logic-in-memory
devices. Controlling magnons in conventional antiferromagnets and harnessing
them in practical applications, however, remains a challenge. In this letter,
we demonstrate highly efficient magnon transport in an
LaFeO$_3$/BiFeO$_3$/LaFeO$_3$ all-antiferromagnetic system which can be
controlled electrically, making it highly desirable for energy-efficient
computation. Leveraging spin-orbit-driven spin-charge transduction, we
demonstrate that this material architecture permits magnon confinement in
ultrathin antiferromagnets, enhancing the output voltage generated by magnon
transport by several orders of magnitude, which provides a pathway to enable
magnetoelectric memory and logic functionalities. Additionally, its
non-volatility enables ultralow-power logic-in-memory processing, where
magnonic devices can be efficiently reconfigured via electrically controlled
magnon spin currents within magnetoelectric channels.
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