Magnetization and dimerization profiles of open spin ladders

Philippe Lecheminant (1) , Edmond Orignac (2)

1 LPTM - UMR 8089 - Laboratoire de Physique Théorique et Modélisation
2 LPTENS - Laboratoire de Physique Théorique de l'ENS [École Normale Supérieure]

The physical properties of the edge states of the open two-leg generalized spin ladder are investigated by means of the bosonization approach. Depending on interchain couplings, two different types of Haldane gapped phases are obtained, one with spin 1/2 edge states, the other one without edge states. We determine the magnetization and dimerization profiles for both phases. Further applications to the spin-1 chain are discussed. Finally, we address the case of interchain interactions breaking SU(2) spin symmetry.

Domaines: Electrons fortement corrélés [cond-mat.str-el]

Philippe Lecheminant, Edmond Orignac. Magnetization and dimerization profiles of open spin ladders. 2003, pp.Physica B vol. 329-333, Part II, 971-972 (2003), ⟨10.1016/S0921-4526(02)02038-0⟩. ⟨hal-00007703⟩