Browsing by Author "Feig, Manuel"

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    Open Access
    Data Underpinning: Coupled frustrated ferromagnetic and antiferromagnetic quantum spin chains in the quasi-one-dimensional mineral antlerite Cu₃⁢SO₄(OH)₄
    (Technische Universität Dresden, 2024-11-06) Kulbakov, Anton A.; Kononenko, Denys Y.; Nishimoto, Satoshi; Stahl, Quirin; Mannathanath Chakkingal, Aswathi; Feig, Manuel; Gumeniuk, Roman; Skourski, Yurii; Bhaskaran, Lakshmi; Zvyagin, Sergei A.; Embs, Jan Peter; Puente-Orench, Inés; Wildes, Andrew; Geck, Jochen; Janson, Oleg; Inosov, Dmytro S.; Peets, Darren C.
    Abstract of the published article: Magnetic frustration, the competition among exchange interactions, often leads to novel magnetic ground states with unique physical properties which can hinge on details of interactions that are otherwise difficult to observe. Such states are particularly interesting when it is possible to tune the balance among the interactions to access multiple types of magnetic order. We present antlerite Cu₃⁢SO₄⁢(OH)₄ as a potential platform for tuning frustration. Contrary to previous reports, the low-temperature magnetic state of its three-leg zigzag ladders is a quasi-one-dimensional analog of the magnetic state recently proposed to exhibit spinon-magnon mixing in botallackite. Density functional theory calculations indicate that antlerite's magnetic ground state is exquisitely sensitive to fine details of the atomic positions, with each chain independently on the cusp of a phase transition, indicating an excellent potential for tunability.
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    Open Access
    Data Underpinning: Incommensurate and multiple-q magnetic misfit order in the frustrated quantum spin ladder material antlerite
    (Technische Universität Dresden, 2024-11-28) Kulbakov, Anton A.; Sadrollahi, Elaheh; Rasch, Florian; Avdeev, Maxim; Gaß, Sebastian; Corredor Bohorquez, Laura Teresa; Wolter, Anja U. B.; Feig, Manuel; Gumeniuk, Roman; Poddig, Hagen; Stötzer, Markus; Litterst, F. Jochen; Puente-Orench, Inés; Wildes, Andrew; Weschke, Eugen; Geck, Jochen; Inosov, Dmytro S.; Peets, Darren Campbell
    This contains the data underpinning our recent paper on antlerite, Cu₃⁢SO₄(OH)₄, published in Phys. Rev. B 106, 174431 (2022). The abstract of the article is reproduced here: In frustrated magnetic systems, the competition amongst interactions can introduce extremely high degeneracy and prevent the system from readily selecting a unique ground state. In such cases, the magnetic order is often exquisitely sensitive to the balance among the interactions, allowing tuning among novel magnetically ordered phases. In antlerite, Cu3⁢SO4⁢(OH)4, Cu2+ (𝑆=1/2) quantum spins populate three-leg zigzag ladders in a highly frustrated quasi-one-dimensional structural motif. We demonstrate that at zero applied field, in addition to its recently reported low-temperature phase of coupled ferromagnetic and antiferromagnetic spin chains, this mineral hosts an incommensurate helical+cycloidal state, an idle-spin state, and a multiple-𝑞 phase which is the magnetic analog of misfit crystal structures. The antiferromagnetic order on the central leg is reentrant. The high tunability of the magnetism in antlerite makes it a particularly promising platform for pursuing exotic magnetic order.