Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 71: Correlated Electrons: Other Theoretical Topics

TT 71.7: Vortrag

Freitag, 20. März 2020, 11:15–11:30, HSZ 304

How to recognize confinement of a hole in a string-like potential in doped antiferromagnets?Krzysztof Bieniasz1,2, •Piotr Wrzosek3, Andrzej M. Oleś2,4, and Krzysztof Wohlfeld31Stewart Blusson Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4 — 2Marian Smoluchowski Institute of Physics, Jagiellonian University, Prof. S. Łojasiewicza 11, PL-30348 Kraków, Poland — 3Faculty of Physics, University of Warsaw, Pasteura 5, PL-02093 Warsaw, Poland — 4Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany

We study the problem of a single hole doped to the antiferromagnet and using analytical methods and state of the art numerics we establish (model independent) signature of the hole confinement in an antiferromagnetic spin background [1]. We show that once the hole is subject to a string-like potential its wave function coefficients need to decay faster than exponentially (’super-exponentially’). As the latter coefficients can be observed in recent cold atoms simulations of the Fermi-Hubbard model [2], we verify whether the hole confinement is realized in doped antiferromagnets.

[1] K. Bieniasz et al., SciPost Phys. 7, 066 (2019)

[2] C. S. Chiu et al., Science 365, 251-256 (2019)

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