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String excitations in quantum antiferromagnets and photoelectron spectroscopy

String excitations in quantum antiferromagnets and photoelectron spectroscopy. E. Manousakis Physics Department, Florida State University and Physics Department, University of Athens, Greece. Graf et al., Phys. Rev. Lett 98, 067004 (2007). Extensions: t-t’-t”-J model.

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String excitations in quantum antiferromagnets and photoelectron spectroscopy

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  1. String excitations in quantum antiferromagnets and photoelectron spectroscopy E. Manousakis Physics Department, Florida State University and Physics Department, University of Athens, Greece

  2. Graf et al., Phys. Rev. Lett 98, 067004 (2007)

  3. Extensions: t-t’-t”-J model What are the “string” excitations The hole in an antiferromagnetically correlated background feels a linear potential as it moves away from its birth site.

  4. Spectral function t-J model, J/t=0.3 t=0.4eV k: (0,0) to (p/2,p/2)

  5. Spectral function t-t’-t”-J model, k: (0,0) to (p/2,p/2) Parameters the same as in Kim et al. PRL 80, 4245 (98).

  6. Spectral function t-J model, J/t=0.3 t=0.4eV k: (0,0) to (p,0)

  7. Spectral function t-t’-t”-J model, k: (0,0) to (p,0)

  8. Comparison with Ronning et al. PRB 71, 094518 (2005)

  9. Ronning et al. t-J model t-t’-t”-J model

  10. t-J model Graf et al., Phys. Rev. Lett 98, 067004 (2007)

  11. Connected string states up to 4 hops

  12. Conclusions

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