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- W2023980704 abstract "We show that doping a Majumdar--Ghosh chain with non-magnetic impurities does {it not} produce almost free spins 1/2. The difference between this system and other spin liquids, such as unfrustrated spin ladders, is illustrated in the context of the general dimerized, frustrated spin chain. By detailed analysis of the excitation spectra of finite chains with two impurities, we investigate the evolution of the screening affecting impurity-induced free spins, and of the sign and magnitude of their effective interactions. We comment on a possible connection to impurity-doping experiments in CuGeO_3." @default.
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- W2023980704 date "2002-02-12" @default.
- W2023980704 modified "2023-09-26" @default.
- W2023980704 title "Absence of effective spins12induced by nonmagnetic impurities in a class of low-dimensional magnets" @default.
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- W2023980704 doi "https://doi.org/10.1103/physrevb.65.104411" @default.
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