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April 15, 20224:00 pm – 5:00 pm (CDT)

Skyrmion-electron bound states in a N\’eel antiferromagnet


Revaz Ramazashvili (Université Paul Sabatier)



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

We show that, in a N\'eel antiferromagnet with a particular location of electron band extrema, a Skyrmion and an electron form a bound state with energy of the order of the gap $\Delta$ in the electron spectrum. The bound state turns the Skyrmion into a charged particle that can be manipulated by electric field. We identify a region in the space of coupling constants, where the Skyrmion-electron bound state makes the
(otherwise metastable) Skyrmion genuinely stable.

Reference: arXiv 2203.03569

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