Hole Propagation in the Orbital Compass Models

W. Brzezickia,b, M. Daghofer c and A.M. Oleśa,d aM. Smoluchowski Institute of Physics, Jagiellonian University, prof. S. Łojasiewicza 11, PL-30348, Kraków, Poland bDipartimento di Fisica "E.R. Caianiello", Universita di Salerno, I-84084 Fisciano (Salerno), Italy cInstitut für Theoretische Festkörperphysik, IFW Dresden, D-01171 Dresden, Germany dMax-Planck-Institut für Festkörperforschung, Heisenbergstr. 1, D-70569 Stuttgart, Germany

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We explore the propagation of a single hole in the generalized quantum compass model which interpolates between fully isotropic antiferromagnetic phase in the Ising model and nematic order of decoupled antiferromagnetic chains for frustrated compass interactions. We observe coherent hole motion due to either interorbital hopping or due to the three-site effective hopping, while quantum spin fluctuations in the ordered background do not play any role.

DOI: 10.12693/APhysPolA.127.263 PACS numbers: 75.10.Jm, 03.65.Ud, 64.70.Tg, 75.25.Dk