Gapped ground state in a spin-1/2 frustrated square lattice

We present a model compound with a spin-1/2 frustrated square lattice, in which three ferromagnetic (F) interactions and one antiferromagnetic (AF) compet. Considering the effective spin-1 formed by the dominant F dimer, this square lattice can be mapped to a spin-1 spatially anisotropic triangular...

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Bibliographic Details
Published inarXiv.org
Main Authors Yamaguchi, H, Uemoto, N, Okubo, T, Kono, Y, Kittaka, S, Sakakibara, T, Yajima, T, Shimono, S, Iwasaki, Y, Hosokoshi, Y
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 29.08.2021
Subjects
Antiferromagnetism
Dimers
Ferromagnetism
Ground state
Magnetic permeability
Magnetization curves
Phase transitions
Physics - Materials Science
Physics - Strongly Correlated Electrons
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Summary:We present a model compound with a spin-1/2 frustrated square lattice, in which three ferromagnetic (F) interactions and one antiferromagnetic (AF) compet. Considering the effective spin-1 formed by the dominant F dimer, this square lattice can be mapped to a spin-1 spatially anisotropic triangular lattice. The magnetization curve exhibits gapped behavior indicative of a dominant one-dimensional (1D) AF correlation. In the field-induced gapless phase, the specific heat and magnetic susceptibility show a phase transition to an ordered state with 2D characteristics. These results indicate that the spin-1 Haldane state is extended to the 2D system. We demonstrate that the gapped ground state observed in the present spin-1/2 frustrated square lattice originates from the one-dimensionalization caused by frustration.
ISSN:2331-8422
DOI:10.48550/arxiv.2108.12761