• Corpus ID: 238583296

Universal excitonic superexchange in spin-orbit-coupled Mott insulators

  title={Universal excitonic superexchange in spin-orbit-coupled Mott insulators},
  author={Chao Li and Gang Chen},
We point out the universal presence of the excitonic superexchange in spin-orbit-coupled Mott insulators. It is observed that, the restriction to the lowest spin-orbit-entangled “J” states may sometimes be insufficient to characterize the microscopic physics, and the virtual excitonic processes via the upper “J” states provide an important correction to the superexchange. We illustrate this excitonic superexchange from a two-dimensional 5d iridate Sr2IrO4 and explain its physical consequences… 

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