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Magnon-polarons in cubic collinear Antiferromagnets by Simensen, Haakon T.; Troncoso, Roberto E.; Kamra, Akashdeep; Brataas, Arne is a scholarly article available to read on EtoBox.

What is Magnon-polarons in cubic collinear Antiferromagnets about?

We present a theoretical study of excitations formed by hybridization between magnons and phonons - magnon-polarons - in antiferromagnets. We first outline a general approach to determining which magnon and phonon modes can and cannot hybridize in a system thereby addressing the qualitative questions concerning magnon-polaron formation. As a specific and experimentally relevant case, we study Nickel Oxide quantitatively and find perfect agreement with the qualitative analysis, thereby highlighting the strength of the former. We find that there are two distinct features of antiferromagnetic magnon-polarons which differ from the ferromagnetic ones. First, hybridization between magnons and the longitudinal phonon modes is expected in many cubic antiferromagnetic structures. Second, we find that the very existence of certain hybridizations can be controlled via an external magnetic field, an effect which comes in addition to the ability to move the magnon modes relative to the phonons modes.

Author

Simensen, Haakon T.; Troncoso, Roberto E.; Kamra, Akashdeep; Brataas, Arne

Published

2018

Language

EN