Quantum critical phenomena in a spin-1/2 frustrated square lattice with spatial anisotropy

doi:10.1103/PhysRevB.103.L220407

Quantum critical phenomena in a spin-1/2 frustrated square lattice with spatial anisotropy

2021-06-15

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DOI：10.1103/PhysRevB.103.L220407

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We present a model compound with a spin-1/2 spatially anisotropic frustrated square lattice, in which three antiferromagnetic interactions and one ferromagnetic interaction are competing. We observe an unconventional gradual increase in the low-temperature magnetization curve reminiscent of the quantum critical behavior between gapped and gapless phases. In addition, the specific heat and electron spin resonance signals indicate one-dimensional characteristics. These results demonstrate quantum critical behavior associated with one dimensionalization caused by frustrated interactions in the spin-1/2 spatially anisotropic square lattice.

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Quantum critical phenomena in a spin-1/2 frustrated square lattice with spatial anisotropy

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