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- W2033611243 abstract "The model that we study is a two-XY-quantum-spin-chain system with Ising interchain magnetic interaction. This model, referred to as the spin-ladder model, is used as a first step to model the thermodynamic properties of low-dimensional spin system. Similarities between the spin-ladder model and the one-dimensional Hubbard model are used in our analysis. As a consequence we can qualitatively understand the heat capacity and spin susceptibilty and show that both measurements are necessary to analyze a spin-ladder system. We also show that the strong-interchain-coupling limit of the spin-ladder model is equivalent to a one-chain spin Heisenberg Hamiltonian. Furthermore, the spin-Peierls transition is investigated for small (ensuremath{Vert}I/2Jensuremath{Vert}ensuremath{ll}1) and large (ensuremath{Vert}I/2Jensuremath{Vert}ensuremath{gg}1) interchain coupling, and we show its occurrence at relatively small spin-phonon coupling (ensuremath{lambda}ensuremath{lesssim}0.6). From the results obtained for the small- and large-interchain-interaction limits, we propose the conjecture that the in-phase dimerization persists for all values of the interaction parameter at zero temperature." @default.
- W2033611243 created "2016-06-24" @default.
- W2033611243 creator A5029903374 @default.
- W2033611243 creator A5069261187 @default.
- W2033611243 date "1991-06-01" @default.
- W2033611243 modified "2023-09-25" @default.
- W2033611243 title "Effect of an interchain magnetic interaction on the dimerized state of a two-XY-quantum-spin-chain ladder" @default.
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- W2033611243 doi "https://doi.org/10.1103/physrevb.43.13187" @default.
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- W2033611243 hasPublicationYear "1991" @default.
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