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Giant Pressure Dependence And Dimensionality Switching In A Metal-organic Quantum Antiferromagnet

Title: Giant Pressure Dependence And Dimensionality Switching In A Metal-organic Quantum Antiferromagnet.
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Name(s): Wehinger, B., author
Fiolka, C., author
Lanza, A., author
Scatena, R., author
Kubus, M., author
Grockowiak, A., author
Coniglio, W. A., author
Graf, D., author
Skoulatos, M., author
Chen, J.-H., author
Gukelberger, J., author
Casati, N., author
Zaharko, O., author
Macchi, P., author
Kramer, K. W., author
Tozer, S., author
Mudry, C., author
Normand, B., author
Ruegg, Ch, author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-09-11
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We report an extraordinary pressure dependence of the magnetic interactions in the metal-organic system [CuF2(H2O)(2)](2) pyrazine. At zero pressure, this material realizes a quasi-two-dimensional spin-1/2 squarelattice Heisenberg antiferromagnet. By high-pressure, high-field susceptibility measurements we show that the dominant exchange parameter is reduced continuously by a factor of 2 on compression. Above 18 kbar, a phase transition occurs, inducing an orbital re-ordering that switches the dimensionality, transforming the quasi-two-dimensional lattice into weakly coupled chains. We explain the microscopic mechanisms for both phenomena by combining detailed x-ray and neutron diffraction studies with quantitative modeling using spin-polarized density functional theory.
Identifier: FSU_libsubv1_wos_000444586600017 (IID), 10.1103/PhysRevLett.121.117201 (DOI)
Keywords: field, exchange, thermochemistry, low-temperatures, magnetic-properties, electron-density, pyrazine
Publication Note: The publisher’s version of record is available at https://doi.org/10.1103/PhysRevLett.121.117201
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000444586600017
Owner Institution: FSU
Is Part Of: Physical Review Letters.
0031-9007
Issue: iss. 11, vol. 121

Choose the citation style.
Wehinger, B., Fiolka, C., Lanza, A., Scatena, R., Kubus, M., Grockowiak, A., … Ruegg, C. (2018). Giant Pressure Dependence And Dimensionality Switching In A Metal-organic Quantum Antiferromagnet. Physical Review Letters. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000444586600017