Bond-Alternating Antiferromagnetic S=1/2 Heisenberg Ladder with Ferromagnetic Diagonal Coupling

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 （th...

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Bibliographic Details
Published inChinese physics letters Vol. 26; no. 12; pp. 217 - 220
Main Author 李安康 路俊哲 马雷
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.12.2009
Subjects
Bonding
Couplings
Density
Dimers
Ferromagnetism
Joining
Ladders
Phase diagrams
参数范围
反铁磁耦合
密度矩阵
海森堡
相互作用
重整化群方法
Online AccessGet full text
ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/26/12/127502

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Summary: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.
Bibliography:O413.1
11-1959/O4
O484.43
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/26/12/127502