Anomalous Spin Dynamics of Hubbard Model on Honeycomb Lattices
Gao-Yong Sun, Su-Peng Kou
TL;DR
This paper investigates the spin dynamics of the honeycomb Hubbard model using a non-linear sigma model, revealing a potential quantum non-magnetic insulator near the metal-insulator transition, which can be expanded by hole doping.
Contribution
It introduces a novel analysis of the honeycomb Hubbard model's spin dynamics using the O(3) non-linear sigma model, identifying a possible quantum non-magnetic insulator.
Findings
Potential quantum non-magnetic insulator near the transition
Doping widens the non-magnetic insulator region
Insights into magnetic properties near the metal-insulator transition
Abstract
In this paper, the honeycomb Hubbard model in optical lattices is investigated using O(3) non-linear sigma model. A possible quantum non-magnetic insulator in a narrow parameter region is found near the metal-insulator transition. We study the corresponding dynamics of magnetic properties, and find that the narrow region could be widened by hole doping.
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