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- W2010348615 abstract "The magnetic phase diagram of the quarter-filled generalized Wigner lattice with nearest-neighbor and next-nearest-neighbor hoppings, ${t}_{1}$ and ${t}_{2}$, is explored. We find a region at negative ${t}_{2}$ with fully saturated ferromagnetic ground states that we attribute to kinetic exchange. Such interaction disfavors antiferromagnetism at ${t}_{2}<0$ and stems from virtual excitations across the charge gap of the Wigner lattice, which is much smaller than the Mott-Hubbard gap $ensuremath{propto}U$. Remarkably, we find a strong dependence of the charge structure factor on magnetism even in the limit $Uensuremath{rightarrow}ensuremath{infty}$, in contrast to the expectation that charge ordering in the Wigner lattice regime should be well described by spinless fermions. Our results, obtained using the density-matrix renormalization group and exact diagonalization, can be transparently explained by means of an effective low-energy Hamiltonian." @default.
- W2010348615 created "2016-06-24" @default.
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- W2010348615 date "2008-11-20" @default.
- W2010348615 modified "2023-09-23" @default.
- W2010348615 title "Magnetism of one-dimensional Wigner lattices and its impact on charge order" @default.
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- W2010348615 doi "https://doi.org/10.1103/physrevb.78.205115" @default.
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