Quantum phase transitions in skewed ladder systems

Das, S and Dey, D and Raghunathan, R and Soos, ZG and Kumar, M and Ramasesha, S (2023) Quantum phase transitions in skewed ladder systems. In: Physical Chemistry Chemical Physics, 26 (1). pp. 36-46.

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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. © 2024 The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Physical Chemistry Chemical Physics
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to authors.
Keywords:	Hamiltonians; Ladders; Phase transitions; Quantum theory, Hamiltonian models; Hamiltonian parameters; High-spin ground state; Ladder system; Modeling parameters; Quantum phase; Quantum-phase transition; Singlet ground state; Spin ladder systems; Spin ladders, Ground state, controlled study; phase transition; review
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	16 Nov 2024 15:11
Last Modified:	16 Nov 2024 15:11
URI:	http://eprints.iisc.ac.in/id/eprint/85310

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