Microscopic theory of spinon-chargon bound states

Post date: Jan 23, 2019

Magnetic polarons are quasiparticles forming when a single hole is doped into an anti-ferromagnet. We study their ground state properties for a single hole in the t-J model, which reveals the microscopic interplay of spin and charge degrees of freedom. In our recent paper, we introduce a trial wavefunction providing a microscopic description of the constituting partons -- a spinon and a chargon -- forming the meson-like magnetic polarons. Our theory is benchmarked by comparison to Monte Carlo simulations and state-of-the-art DMRG calculations. These calculations support ongoing experiments with ultracold atoms in a quantum gas microscope and demonstrate how their capabilities allows for microscopic checks of our theoretical model.

Our work has been published:

F. Grusdt, A. Bohrdt and E. Demler, Microscopic spinon-chargon theory of magnetic polarons in the t-J model, Phys. Rev. B 99, 224422.