Quantum Phase Transitions in Skewed Ladder Systems
Abstract
In this brief review, we introduce a new spin ladder system called skewed spin ladders and discuss the exotic quantum phases of this system. The spin ladders studied are the 5/7, 3/4 and 3/5 systems corresponding to alternately fused 5 and 7 membered rings; 3 and 4 membered rings; and 3 and 5 membered rings. These ladders show completely different behaviour as the Hamiltonian model parameter is changed. When the Hamiltonian parameter is increased the 5/7 ladder switches from an initial singlet ground state to progressively higher spin ground state and then to a reentrant singlet state before finally settling to the highest spin ground state whose spin equals the number of unit cells in the system. The 3/4 ladder goes from a singlet ground state to a high spin ground state with each unit cell contributing spin 1 to the state, as the model parameter is increased. The 3/5 ladder shows a singlet ground state for small parameters and high spin ground state for intermediate values of the parameter and for still higher parameters, a reentrant singlet ground state. They can also show interesting magnetization plateaus as illustrated by studies on a specific spin ladder.
Keywords
Cite
@article{arxiv.2311.05000,
title = {Quantum Phase Transitions in Skewed Ladder Systems},
author = {Sambunath Das and Dayasindhu Dey and Rajamani Raghunathan and Zoltán G. Soos and Manoranjan Kumar and S. Ramasesha},
journal= {arXiv preprint arXiv:2311.05000},
year = {2023}
}