Regensburg 2022 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 34: Correlated Electrons: Theory 2

TT 34.1: Talk

Thursday, September 8, 2022, 15:00–15:15, H23

The fate of the spin polaron in the 1D t-J model — •Piotr Wrzosek — Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Pasteura 5, PL-02093 Warsaw, Poland

We study the intrinsic origin of the well-established differences in the motion of a single hole in the 1D and 2D antiferromagnet. To this end, we consider a 1D t-J model, perform the slave fermion transformation to the holon-magnon basis, and solve the obtained model in a numerically exact manner. We explicitly show that the spin polaron quasiparticle, which is well-known from the studies of a single hole in the 2D antiferromagnet, is destroyed in the 1D t-J model by the magnon-magnon interactions. Nevertheless, we observe surprising similarities between the spectra obtained with and without magnon-magnon interactions, indicating that some of the key features of the spin polaron physics are still preserved in 1D.