Variational Monte Carlo Study of the Kondo Necklace Model with Geometrical Frustration

Details Variational Monte Carlo Study of the Kondo Necklace Model with Geometrical Frustration Variational Monte Carlo Study of the Kondo Necklace Model with Geometrical Frustration

2011-07-15

arxiv.org/abs/1107.2987v1

J. Phys. Soc. Jpn. 80 (2011) Supplement A pp. SA133

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, proceedings for ICHE2010

Scientific paper

We investigate the ground state of the Kondo necklace model on geometrically-frustrated lattices by the variational Monte Carlo simulation. To explore the possibility of a partially-ordered phase, we employ an extension of the Yosida-type wave function as a variational state, which can describe a coexistence of spin-singlet formation due to the Kondo coupling and magnetic ordering by the Ruderman-Kittel-Kasuya-Yosida interaction. We show the benchmark of the numerical simulation to demonstrate the high precision brought by the optimization of a large number of variational parameters. We discuss the ground-state phase diagram for the model on the kagome lattice in comparison with that for the triangular-lattice case.

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