Bond-Alternating Antiferromagnetic S =1/2 Heisenberg Ladder with Ferromagnetic Diagonal Coupling
Received Date:
October 07, 2009
Published Date:
November 30, 2009
Abstract
Using the density matrix renormalization group method, we determine the phase diagram of a frustrated bond-alternating S=1/2 Heisenberg ladder with ferro-antiferromagnetic couplings at zero temperature. With the interactions between spins along the rungs set, we identify three spin-gapped phases (the Haldane phase, the singlet phase and the dimer phase) in the whole parameter range. The analysis of our data shows that two-leg spin bond-alternating ladders have a rich phase diagram if both rung and diagonal couplings are taken into account.
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About This Article
Cite this article:
LI An-Kang, LU Jun-Zhe, MA Lei. Bond-Alternating Antiferromagnetic
S =1/2 Heisenberg Ladder with Ferromagnetic Diagonal Coupling[J].
Chin. Phys. Lett. , 2009, 26(12): 127502.
DOI: 10.1088/0256-307X/26/12/127502
LI An-Kang, LU Jun-Zhe, MA Lei. Bond-Alternating Antiferromagnetic S =1/2 Heisenberg Ladder with Ferromagnetic Diagonal Coupling[J]. Chin. Phys. Lett. , 2009, 26(12): 127502. DOI: 10.1088/0256-307X/26/12/127502
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