Photoemission spectrum of Ca2RuO4 : Spin polaron physics in an S=1 antiferromagnet with anisotropies

@article{Kosiski2019PhotoemissionSO,
  title={Photoemission spectrum of 
Ca2RuO4
: Spin polaron physics in an 
S=1
 antiferromagnet with anisotropies},
  author={Adam Kłosiński and D. V. Efremov and Jeroen van den Brink and Krzysztof Wohlfeld},
  journal={Physical Review B},
  year={2019}
}
We derive an S=1 spin polaron model which describes the motion of a single hole introduced into the S=1 spin antiferromagnetic ground state of Ca2RuO4. We solve the model using the self-consistent Born approximation and show that its hole spectral function qualitatively agrees with the experimentally observed high-binding energy part of the Ca2RuO4 photoemission spectrum. We explain the observed peculiarities of the photoemission spectrum by linking them to two anisotropies present in the… 

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