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• W1978777550 abstract "We present an extensive numerical study of spin quadrupolar correlations in single and coupled bilinear-biquadratic spin one chains, using several methods such as exact diagonalization, density matrix renormalization group, and strong coupling series expansions. For the single chain, we clarify the dominant correlation function in the enigmatic gapless period-three phase for $ensuremath{theta}∊(ensuremath{pi}∕4,ensuremath{pi}∕2)$, which is of spin quadrupolar nature with a period three spatial structure. Then we revisit the open problem of the possible existence of a ferroquadrupolar phase between the dimerized and the ferromagnetic phases. Although an extended critical region is in principle compatible with the numerical results, a scenario with a huge crossover scale is more plausible. Finally we study the fate of the dimerized phase upon coupling two chains in a ladder geometry. The dimerized phase rapidly vanishes and an extended gapped phase takes over. This gapped phase presumably has dominant short-ranged ferroquadrupolar correlations for $ensuremath{theta}∊(ensuremath{-}3ensuremath{pi},4,ensuremath{-}ensuremath{pi}∕2)$ and---surprisingly---seems to be adiabatically connected to the plaquette single solid phase of the Heisenberg $S=1$ ladder and therefore also with the Haldane phase of isolated chains." @default.
• W1978777550 created "2016-06-24" @default.
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• W1978777550 date "2006-10-26" @default.
• W1978777550 modified "2023-10-18" @default.
• W1978777550 title "Spin nematics correlations in bilinear-biquadratic<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math>spin chains" @default.
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• W1978777550 doi "https://doi.org/10.1103/physrevb.74.144426" @default.
• W1978777550 hasPublicationYear "2006" @default.
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