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Antiferromagnetic Order and Spin-Canting Transition in the Corrugated Square Net Compound Cu3(TeO4)(SO4)·H2O.
Wang, Zhi-Cheng; Thanabalasingam, Kulatheepan; Scheifers, Jan P; Streeter, Alenna; McCandless, Gregory T; Gaudet, Jonathan; Brown, Craig M; Segre, Carlo U; Chan, Julia Y; Tafti, Fazel.
Afiliação
  • Wang ZC; Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, United States.
  • Thanabalasingam K; Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, Texas 75080, United States.
  • Scheifers JP; Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, Texas 75080, United States.
  • Streeter A; Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, United States.
  • McCandless GT; Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, Texas 75080, United States.
  • Gaudet J; Department of Materials Science and Engineering, Maryland University, College Park, Maryland 20942-2115, United States.
  • Brown CM; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United States.
  • Segre CU; NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United States.
  • Chan JY; Department of Physics & CSRRI, Illinois Institute of Technology, Chicago, Illinois 60616, United States.
  • Tafti F; Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, Texas 75080, United States.
Inorg Chem ; 60(14): 10565-10571, 2021 Jul 19.
Article em En | MEDLINE | ID: mdl-34176270
Strongly correlated electrons in layered perovskite structures have been the birthplace of high-temperature superconductivity, spin liquids, and quantum criticality. Specifically, the cuprate materials with layered structures made of corner-sharing square-planar CuO4 units have been intensely studied due to their Mott insulating ground state, which leads to high-temperature superconductivity upon doping. Identifying new compounds with similar lattice and electronic structures has become a challenge in solid-state chemistry. Here, we report the hydrothermal crystal growth of a new copper tellurite sulfate, Cu3(TeO4)(SO4)·H2O, a promising alternative to layered perovskites. The orthorhombic phase (space group Pnma) is made of corrugated layers of corner-sharing CuO4 square-planar units that are edge-shared with TeO4 units. The layers are linked by slabs of corner-sharing CuO4 and SO4. Using both the bond valence sum analysis and magnetization data, we find purely Cu2+ ions within the layers but a mixed valence of Cu2+/Cu+ between the layers. Cu3(TeO4)(SO4)·H2O undergoes an antiferromagnetic transition at TN = 67 K marked by a peak in the magnetic susceptibility. Upon further cooling, a spin-canting transition occurs at T* = 12 K, evidenced by a kink in the heat capacity. The spin-canting transition is explained on the basis of a J1-J2 model of magnetic interactions, which is consistent with the slightly different in-plane superexchange paths. We present Cu3(TeO4)(SO4)·H2O as a promising platform for the future doping and strain experiments that could tune the Mott insulating ground state into superconducting or spin liquid states.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article