Disorder-driven magnetic duality in the spin-$\frac{1}{2}$ system ktenasite, Cu$_\text{2.7}$Zn$_\text{2.3}$(SO$_\text{4}$)$_\text{2}$(OH)$_\text{6}\cdot$6H$_\text{2}$O
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| Format: | Preprint |
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2025
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| author | Parui, Kaushick K. Kulbakov, Anton A. Gumeniuk, Roman Carrillo-Aravena, Eduardo Fernández-Díaz, María Teresa Savvin, Stanislav Korshunov, Artem Granovsky, Sergey Doert, Thomas Inosov, Dmytro S. Peets, Darren C. |
| author_facet | Parui, Kaushick K. Kulbakov, Anton A. Gumeniuk, Roman Carrillo-Aravena, Eduardo Fernández-Díaz, María Teresa Savvin, Stanislav Korshunov, Artem Granovsky, Sergey Doert, Thomas Inosov, Dmytro S. Peets, Darren C. |
| contents | Disorder in frustrated quantum systems can critically influence their magnetic ground states and drive exotic correlated behavior. In the $S = \frac{1}{2}$ system ktenasite, Cu$_\text{2.7}$Zn$_\text{2.3}$(SO$_\text{4}$)$_\text{2}$(OH)$_\text{6}\cdot$6H$_\text{2}$O, we show that structural disorder drives an unexpected dimensional crossover and stabilizes a rare coexistence of distinct magnetic states. Neutron diffraction reveals significant Cu/Zn mixing at the Cu2 site, which tunes the Cu$^{2+}$ sublattice from a two-dimensional scalene-distorted triangular lattice into a one-dimensional spin-chain network. Magnetic susceptibility, neutron diffraction, ac susceptibility, and specific heat measurements collectively indicate magnetic duality: a coexistence of incommensurate long-range magnetic order below $T_\text{N} = 4\,$K and a cluster spin-glass state with $T_\text{f} = 3.28\,$K at $ν= 10\,$Hz. Our findings highlight ktenasite as a rare platform where structural disorder tunes the effective dimensionality and stabilizes coexisting ordered and glassy magnetic phases, offering a unique opportunity to explore the interplay of frustration, disorder, and dimensional crossover in quantum magnets. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_18939 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Disorder-driven magnetic duality in the spin-$\frac{1}{2}$ system ktenasite, Cu$_\text{2.7}$Zn$_\text{2.3}$(SO$_\text{4}$)$_\text{2}$(OH)$_\text{6}\cdot$6H$_\text{2}$O Parui, Kaushick K. Kulbakov, Anton A. Gumeniuk, Roman Carrillo-Aravena, Eduardo Fernández-Díaz, María Teresa Savvin, Stanislav Korshunov, Artem Granovsky, Sergey Doert, Thomas Inosov, Dmytro S. Peets, Darren C. Strongly Correlated Electrons Disorder in frustrated quantum systems can critically influence their magnetic ground states and drive exotic correlated behavior. In the $S = \frac{1}{2}$ system ktenasite, Cu$_\text{2.7}$Zn$_\text{2.3}$(SO$_\text{4}$)$_\text{2}$(OH)$_\text{6}\cdot$6H$_\text{2}$O, we show that structural disorder drives an unexpected dimensional crossover and stabilizes a rare coexistence of distinct magnetic states. Neutron diffraction reveals significant Cu/Zn mixing at the Cu2 site, which tunes the Cu$^{2+}$ sublattice from a two-dimensional scalene-distorted triangular lattice into a one-dimensional spin-chain network. Magnetic susceptibility, neutron diffraction, ac susceptibility, and specific heat measurements collectively indicate magnetic duality: a coexistence of incommensurate long-range magnetic order below $T_\text{N} = 4\,$K and a cluster spin-glass state with $T_\text{f} = 3.28\,$K at $ν= 10\,$Hz. Our findings highlight ktenasite as a rare platform where structural disorder tunes the effective dimensionality and stabilizes coexisting ordered and glassy magnetic phases, offering a unique opportunity to explore the interplay of frustration, disorder, and dimensional crossover in quantum magnets. |
| title | Disorder-driven magnetic duality in the spin-$\frac{1}{2}$ system ktenasite, Cu$_\text{2.7}$Zn$_\text{2.3}$(SO$_\text{4}$)$_\text{2}$(OH)$_\text{6}\cdot$6H$_\text{2}$O |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.18939 |