Absence of true long-range orbital order in a two-leg Kondo ladder
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2007-07-01
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Amer Physical Soc
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We investigate, through the density-matrix renormalization group and the Lanczos technique, the possibility of a two-leg Kondo ladder presenting an incommensurate orbital order. Our results indicate staggered short-range orbital order at half-filling. Away from half-filling our data are consistent with incommensurate quasi-long-range orbital order. We also observed that an interaction between the localized spins enhances the rung-rung current correlations.
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Physical Review B. College Pk: Amer Physical Soc, v. 76, n. 1, 6 p., 2007.