Chirality-spin separation in the Hubbard model on the kagome lattice - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: Effect of geometrical frustration in strongly-correlated metallic region isstudied for the Hubbard model on the kagome lattice at half filling by acluster extension of the dynamical mean-field theory combined with acontinuous-time auxiliary-field quantum Monte Carlo method. We find that theelectron correlation enhances the spin chirality in both vector and scalarchannels. The chirality grows as decreasing temperature and exhibits a peak ata low temperature, indicating a new energy scale under strong correlation. Thepeak temperature is considerably lower than that for the local spin moment,namely, the characteristic temperatures for the chirality and the local momentare well separated. This is a signature of separation between spin and chiraldegrees of freedom in the correlated metallic regime under geometricalfrustration.



Author: Masafumi Udagawa, Yukitoshi Motome

Source: https://arxiv.org/







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