Kavli Affiliate: Leon Balents
| First 5 Authors: Urban F. P. Seifert, Leon Balents
| Summary:
Moir’e heterostructures of transition metal dichalcogenides exhibit
Mott-insulating behaviour both at half-filling as well as at fractional
fillings, where electronic degrees of freedom form self-organized Wigner
crystal states. An open question concerns magnetic states obtained by lifting
the pseudospin-1/2 degeneracy of these states at lowest temperatures. While at
half-filling virtual hopping is expected to induce (weak) antiferromagnetic
exchange interactions, these are strongly suppressed when considering
$textit{dilute}$ filling fractions. We argue that instead a small
concentration of doped electrons leads to the formation of spin-polarons,
inducing ferromagnetic order at experimentally relevant temperatures. We
predict explicit signatures of polaron-formation in the magnetization profile
of the system.
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