Coulomb spin liquid in anion-disordered pyrochlore Tb2Hf2O7
| Autor: | Gøran J. Nilsen, O. Zaharko, Tom Fennell, Anthony A. Amato, Michel Kenzelmann, Uwe Stuhr, Monica Ciomaga Hatnean, Georg Ehlers, Hubertus Luetkens, Geetha Balakrishnan, Matthias Frontzek, Chris Baines, Vladimir Pomjakushin, Romain Sibille, Eric Ressouche, D. T. Adroja, Helen Walker, Antonio Cervellino, Elsa Lhotel |
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| Přispěvatelé: | Paul Scherrer Institute (PSI), Magnétisme et Supraconductivité (MagSup ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), University of Warwick [Coventry], Institut Laue-Langevin (ILL), ILL, ISIS Facility, STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC), Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, Magnétisme et Diffusion Neutronique (MDN), Modélisation et Exploration des Matériaux (MEM), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), European Project: 290605,EC:FP7:PEOPLE,FP7-PEOPLE-2011-COFUND,PSI-FELLOW(2012), European Project: 228464,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2008-1,MICROKELVIN(2009), Magnétisme et Supraconductivité (NEEL - MagSup), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Magnetism Science Pyrochlore FOS: Physical sciences General Physics and Astronomy 02 engineering and technology engineering.material 01 natural sciences Condensed Matter::Disordered Systems and Neural Networks General Biochemistry Genetics and Molecular Biology Ion Crystal Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Coulomb lcsh:Science 010306 general physics Spin (physics) QC ComputingMilieux_MISCELLANEOUS Multidisciplinary Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Charge (physics) General Chemistry 021001 nanoscience & nanotechnology 3. Good health engineering Condensed Matter::Strongly Correlated Electrons lcsh:Q Quantum spin liquid [PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el] 0210 nano-technology |
| Zdroj: | Nature Communications Nature Communications, Nature Publishing Group, 2017, 8, pp.892. ⟨10.1038/s41467-017-00905-w⟩ Nature Communications, 2017, 8, pp.892. ⟨10.1038/s41467-017-00905-w⟩ 'Nature Communications ', vol: 8, pages: 892-1-892-9 (2017) Nature Communications, Vol 8, Iss 1, Pp 1-9 (2017) |
| ISSN: | 2041-1723 |
| Popis: | The charge ordered structure of ions and vacancies characterizing rare-earth pyrochlore oxides serves as a model for the study of geometrically frustrated magnetism. The organization of magnetic ions into networks of corner-sharing tetrahedra gives rise to highly correlated magnetic phases with strong fluctuations, including spin liquids and spin ices. It is an open question how these ground states governed by local rules are affected by disorder. In the pyrochlore Tb$_2$Hf$_2$O$_7$, we demonstrate that the vicinity of the disordering transition towards a defective fluorite structure translates into a tunable density of anion Frenkel disorder while cations remain ordered. Quenched random crystal fields and disordered exchange interactions can therefore be introduced into otherwise perfect pyrochlore lattices of magnetic ions. We show that disorder can play a crucial role in preventing long-range magnetic order at low temperatures, and instead induces a strongly-fluctuating Coulomb spin liquid with defect-induced frozen magnetic degrees of freedom. 18 pages, 4 figures, + Supplementary Information (4 figures) |
| Databáze: | OpenAIRE |
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