Quantum phases of a frustrated spin-1 system: The 5/7 skewed ladder

Das, S and Dey, D and Kumar, M and Ramasesha, S (2021) Quantum phases of a frustrated spin-1 system: The 5/7 skewed ladder. In: Physical Review B, 104 (12).

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Abstract

The quantum phases in a spin-1 skewed ladder system formed by alternately fusing five- and seven-membered rings are studied numerically using the exact diagonalization technique up to 16 spins and using the density matrix renormalization group method for larger system sizes. The ladder has a fixed isotropic antiferromagnetic (AF) exchange interaction () between the nearest-neighbor spins along the legs and a varying isotropic AF exchange interaction () along the rungs. As a function of , the system shows many interesting ground states (gs) which vary from different types of nonmagnetic and ferrimagnetic gs. The study of various gs properties such as spin gap, spin-spin correlations, spin density, and bond order reveal that the system has four distinct phases, namely, the AF phase at small ; the ferrimagnetic phase with gs spin for and with for , where is the number of unit cells; and a reentrant nonmagnetic phase at . The system also shows the presence of spin current at specific values due to simultaneous breaking of both reflection and spin parity symmetries. © 2021 American Physical Society

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	The copyright for this article belongs to Authors
Keywords:	Exchange interactions; Ground state; Ladders; Statistical mechanics, 1-systems; Antiferromagnetic exchange interactions; Density matrix renormalization group methods; Diagonalization techniques; Exact diagonalization; Ferrimagnetics; Isotropics; Ladder system; Quantum phase; Seven-membered rings, Ferrimagnetism
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	29 Nov 2021 09:54
Last Modified:	29 Nov 2021 09:54
URI:	http://eprints.iisc.ac.in/id/eprint/70280

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