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

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Quantum phases of a frustrated spin-1 system: The 5/7 skewed ladder
Physical Review B ( IF 3.2 ) Pub Date : 2021-09-27 , DOI: 10.1103/physrevb.104.125138
Sambunath Das ₁ , Dayasindhu Dey ₁ , Manoranjan Kumar ₂ , S. Ramasesha ₁

Affiliation

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 (

J_{2} = 1

) between the nearest-neighbor spins along the legs and a varying isotropic AF exchange interaction (

J_{1}

) along the rungs. As a function of

J_{1}

, 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