Antiferromagnetic Spin Ladders with Odd and Even number of Chains

Details Antiferromagnetic Spin Ladders with Odd and Even number of Chains Antiferromagnetic Spin Ladders with Odd and Even number of Chains

1996-10-30

arxiv.org/abs/cond-mat/9610213v1

Physics

Condensed Matter

Strongly Correlated Electrons

22 pages, LaTeX, 6 figures available upon request, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.55.3613

We construct frustrated antiferromagnetic spin ladders with m chains for which the exact ground state can be determined in a particular parameter regime. The excitation spectrum is shown rigorously to be gapless ( with gap ) for odd ( even ) m. In a general parameter regime, the four-chain and periodic ladders are studied using a mean-field theory based on the bond operator formalism for spin $S=1/2$. The excitation spectrum and the spin-gap are calculated in both the cases. The spin-gap of the frustrated ladder system has a larger magnitude than in the case of non-frustrated ladders. For the frustrated periodic ladder, the spin-gap vanishes at a critical value of the interladder coupling strength which is larger than the critical value in the case of non-frustrated periodic ladder.

Affiliated with

Also associated with

No associations

Rating

Antiferromagnetic Spin Ladders with Odd and Even number of Chains does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Antiferromagnetic Spin Ladders with Odd and Even number of Chains, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antiferromagnetic Spin Ladders with Odd and Even number of Chains will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-618665