Year: 2026
Type: preprint
Abstract: Nagaoka polarons are canonical examples of kinetic magnetism. Although their spin structure is well understood, their transport remains unexplored. We compute the dynamical mobility of a single hole in the square-lattice $t$-model using resummation-based quantum Monte Carlo and analytic continuation. Upon cooling, an incoherent Drude-like response gives way to a finite-frequency peak as the dc mobility vanishes. The peak signals an internal mode of a hole confined by its ferromagnetic cloud. Our results establish transport as an incisive probe of polaron formation and kinetic self-trapping.
Source: arXiv (Cornell University)
Authors: Xiao, Yusong, Wan, Yuan
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1954217405, G8425566183
OpenAlex ID: W7222931133