# Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr$\_2$O$\_4$

Source: [Molecular spin-liquid state in spin-3/2 frustrated spinel HgCr$\_2$O$\_4$](<https://www.sota2.com/research/paper/68fa2a9b1e209131ce83ef2e>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T13:39:46.524Z

Authors: K. Tomiyasu, H. Ueda, M. Matsuda, M. Yokoyama, K. Iwasa, K. Yamada

Published: 2011-04-12T10:47:38.000Z

## Abstract

A hexamer-type spin excitation seen in spinel chromates $A$Cr$\_2$O$\_4$ ($A$ = Mg, Zn, or Cd) is the representative spin-liquid-like state caused by geometrical frustration. To clarify an origin of the state, we comparatively studied spin excitations in an isomorphic material HgCr$\_2$O$\_4$ by inelastic neutron scattering, and observed a different molecular-type excitation. Numerical analyses performed using model Hamiltonians suggest that these two types of spin excitations originate from a spin-3/2 molecular singlet hidden in a magnetically ordered phase. The difference between the molecular types is explained by the difference in the kind of exchange interactions occurring in the chromates.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1104.2163>)

[PDF](<https://arxiv.org/pdf/1104.2163.pdf>)