Magnetic polarons in two-component hard core bosons
arXiv:1301.2614 · doi:10.1103/PhysRevA.87.043622
Abstract
We use a high-temperature expansion to explore spin correlations around a single hole in a two- dimensional lattice filled with a hard-core two component bose gas. We find that the spins around the hole develop ferromagnetic order and quantify the degree of polarization at temperatures of order the hopping energy, finding a measurably nonzero polarization. We also discuss the effect of fixing the overall magnetization of the system for finite-sized systems.
5 pages, 3 figures
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