# Frustrated spin ladder with alternating spin-1 and spin-1/2 rungs

@article{Chandra2010FrustratedSL, title={Frustrated spin ladder with alternating spin-1 and spin-1/2 rungs}, author={V. Chandra and N. Ivanov and J. Richter}, journal={Physical Review B}, year={2010}, volume={81}, pages={024409} }

We study the impact of the diagonal frustrating couplings on the quantum phase diagram of a two-leg ladder composed of alternating spin-1 and spin-$\frac{1}{2}$ rungs. As the coupling strength is increased the system successively exhibits two gapped paramagnetic phases (a rung-singlet and a Haldane-type nondegenerate states) and two ferrimagnetic phases with different ferromagnetic moments per rung. The first two states are similar to the phases studied in the frustrated spin-$\frac{1}{2… Expand

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#### References

SHOWING 1-10 OF 68 REFERENCES

Antiferromagnetically coupled alternating spin chains

- Physics
- 2001

The effect of antiferromagnetic interchain coupling in alternating spin-(1,1/2) chains is studied by means of spin-wave theory and density-matrix renormalization group (DMRG). In particular, two… Expand

Excitation spectrum of Heisenberg spin ladders.

- Physics, Medicine
- Physical review. B, Condensed matter
- 1993

Strong-coupling perturbation theory, spin-wave theory, Lanczos techniques, and a Monte Carlo method are applied to determine the ground-state energy and the low-lying excitation spectrum of the spin-1/2 ladder. Expand

Phase diagram of a frustrated mixed-spin ladder with diagonal exchange bonds

- Physics
- 2004

Using exact numerical diagonalization and the conformal field theory approach, we study the effect of magnetic frustrations due to diagonal exchange bonds in a system of two coupled mixed-spin… Expand

Low-lying excited states and low-temperature properties of an alternating spin-1-spin-1/2 chain: A density-matrix renormalization-group study

- Physics
- 1997

We report spin wave and density-matrix renormalization-group (DMRG) studies of the ground and low-lying excited states of uniform and dimerized alternating spin chains. The DMRG procedure is also… Expand

Antiferromagnetic sawtooth chain with spin-1/2 and spin-1 sites

- Physics
- 2004

We study the low-energy properties of a sawtooth chain with spin-1's at the bases of the triangles and spin-$\frac{1}{2}\mathrm{'}\mathrm{s}$at the vertices of the triangles. The spins have… Expand

Spin-wave series for quantum one-dimensional ferrimagnets

- Physics
- 1998

Second-order spin-wave expansions are used to compute the ground-state energy and sublattice magnetizations of the quantum one-dimensional Heisenberg ferrimagnet with nearest-neighbor… Expand

Magnetic phase diagram of a frustrated ferrimagnetic ladder: Relation to the one-dimensional boson Hubbard model

- Physics
- 2006

We study the magnetic phase diagram of two coupled mixed-spin $(1,{1/2})$ Heisenberg chains as a function of the frustration parameter related to diagonal exchange couplings. The analysis is… Expand

Spin models of quasi-1D quantum ferrimagnets with competing interactions

- Physics
- 2009

We present a brief survey of the recent theoretical work related to generic Heisenberg spin models describing quasi-one-dimensional quantum ferrimagnets. The emphasis is on quantum chains and ladders… Expand

Magnetization Plateau in the Frustrated Alternating Spin Chain

- Physics
- 2004

We study the magnetization plateau at m =1/2 in the S =1/2 and S =1 alternating spin Heisenberg chain with two next-nearest-neighbor (NNN) interactions J a between neighboring S =1/2 spins and J b… Expand

Search for quantum dimer phases and transitions in a frustrated spin ladder

- Physics
- 2006

A two-leg spin-1/2 ladder with diagonal interactions is investigated numerically. We focus our attention on the possibility of columnar dimer phase, which was recently predicted based on a… Expand