Orbitally induced string formation in the spin-orbital polarons

Physical Review B - Condensed Matter and Materials Physics

Volumn 79, Issue 22, 2009, Pages

  Wohlfeld, Krzysztof ^a,b   Oleś, Andrzej M ^a,b   Horsch, Peter ^a  

^a MAX PLANCK INSTITUT FÜR FESTKÖRPERFORSCHUNG   (Germany)

^b JAGIELLONIAN UNIVERSITY   (Poland)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 68949108616     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.224433     Document Type: Article

References (50)

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44. We have verified analytically that these terms would not lead to any k dependence in the spectra as in the self-energies describing such processes one can shift the summation over the momenta in such a way that the self-energies are momentum independent (See also Sec. 3 for a similar calculation concerning the self-energies for two boson lines). Thus, these terms would not change the qualitative feature of the calculated spectra, i.e., that the k dependence of the quasiparticle states originates entirely from the three-site terms. Besides, we note that inclusion of such terms would require going beyond the LSW and LOW approximation, i.e., we would have to include the interactions between magnons and/or orbitons.
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