Alternating-Spin Ladders in a Magnetic Field: New Magnetization Plateaux

Details Alternating-Spin Ladders in a Magnetic Field: New Magnetization Plateaux Alternating-Spin Ladders in a Magnetic Field: New Magnetization Plateaux

2000-12-15

arxiv.org/abs/cond-mat/0012278v1

Phys. Rev. B 62, 11725 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

REVTEX file, 7 pages, 6 eps Figures

Scientific paper

10.1103/PhysRevB.62.11725

We study numerically the formation of magnetization plateaux with the Lanczos method in 2-leg ladders with mixed spins of magnitudes $(S_1,S_2)=(1,1/2)$ located at alternating positions along the ladder and with dimerization $\gamma$. For interchain coupling $J'>0$ and $\gamma=0$, we find normalized plateaux at $m=1/3$ starting at zero field and $m=1$ (saturation), while when $\gamma \ne 0$ is columnar, another extra plateau at $m=2/3$ shows up. For $J'<0$, when $\gamma<\gamma_c(J')$ we find no plateau while for $\gamma>\gamma_c(J')$ we find four plateaux at $m=0,1/3,2/3,1$. We also apply several approximate analytical methods (Spin Wave Theory, Low-Energy Effective Hamiltonians and Bosonization) to understand these findings and to conjeture the behaviour of ferrimagnetic ladders with a bigger number of legs.

Affiliated with

Also associated with

No associations

Rating

Alternating-Spin Ladders in a Magnetic Field: New Magnetization Plateaux 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 Alternating-Spin Ladders in a Magnetic Field: New Magnetization Plateaux, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Alternating-Spin Ladders in a Magnetic Field: New Magnetization Plateaux will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-510481