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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2002

Magnetization and dimerization profiles of the cut two-leg spin ladder and spin-1 chain

Résumé

The physical properties of the edge states of the cut two-leg spin ladder are investigated by means of the bosonization approach. By carefully treating boundary conditions, we derive the existence of spin-1/2 edge states in the spin ladder with a ferromagnetic rung exchange and for the open spin-1 Heisenberg chain. In contrast, such states are absent in the antiferromagnetic rung coupling case. The approach, based on a mapping onto decoupled semi-infinite off-critical Ising models, allows us to compute several physical quantities of interest. In particular, we determine the magnetization and dimerization profiles of the cut two-leg spin ladder and of the open biquadratic spin-1 chain in the vicinity of the SU(2)$_2$ WZNW critical point.

Dates et versions

hal-00007701 , version 1 (26-07-2005)

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Philippe Lecheminant, Edmond Orignac. Magnetization and dimerization profiles of the cut two-leg spin ladder and spin-1 chain. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2002, 65, pp.174406. ⟨10.1103/PhysRevB.65.174406⟩. ⟨hal-00007701⟩
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