Structure, Spin Correlations, and Magnetism of the S=1/2 Square-Lattice Antiferromagnet Sr2CuTe1-x W x O6 (0 ≤ x ≤ 1)

被引：4

作者：

Mustonen, Otto H. J. ^{[8
,9
]}

Fogh, Ellen ^{[5
]}

Paddison, Joseph A. M. ^{[1
]}

Mangin-Thro, Lucile ^{[2
]}

Hansen, Thomas ^{[2
]}

Playford, Helen Y. ^{[3
]}

Diaz-Lopez, Maria ^{[4
]}

Babkevich, Peter ^{[5
]}

Vasala, Sami ^{[6
]}

Karppinen, Maarit ^{[7
]}

Cussen, Edmund J. ^{[8
]}

Ronnow, Henrik M. ^{[3
]}

Walker, Helen C. ^{[3
]}

机构：

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[2] Inst Laue Langevin, F-38042 Grenoble 9, France

[3] Rutherford Appleton Lab, ISIS Neutron & Muon Source, Didcot OX11 OQX, England

[4] Univ Grenoble Alpes, Inst Neel, CNRS, Grenoble INP, F-38000 Grenoble, France

[5] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lab Quantum Magnetism LQM, CH-1015 Lausanne, Switzerland

[6] ESRF European Synchrotron, 38000 Grenoble, France

[7] Aalto Univ, Dept Chem & Mat Sci, FI-00076 Espoo, Finland

[8] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, England

[9] Univ Birmingham, Sch Chem, Birmingham B15 2TT, England

来源：

CHEMISTRY OF MATERIALS | 2023年 / 36卷 / 01期

基金：

欧洲研究理事会;

关键词：

BILBAO CRYSTALLOGRAPHIC SERVER; MU-SR; SCATTERING; STATE; SUPERCONDUCTIVITY; VISUALIZATION; SPECTROMETER; REFINEMENT; SEPARATION; CRYSTAL;

D O I：

10.1021/acs.chemmater.3c02535

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Quantum spin liquids are highly entangled magnetic states with exotic properties. The S = 1/2 square-lattice Heisenberg model is one of the foundational models in frustrated magnetism with a predicted, but never observed, quantum spin liquid state. Isostructural double perovskites Sr2CuTeO6 and Sr2CuWO6 are physical realizations of this model but have distinctly different types of magnetic order and interactions due to a d(10)/d(0) effect. Long-range magnetic order is suppressed in the solid solution Sr2CuTe1-xWxO6 in a wide region of x = 0.05-0.6, where the ground state has been proposed to be a disorder-induced spin liquid. Here, we present a comprehensive neutron scattering study of this system. We show using polarized neutron scattering that the spin liquid-like x = 0.2 and x = 0.5 samples have distinctly different local spin correlations, which suggests that they have different ground states. Low-temperature neutron diffraction measurements of the magnetically ordered W-rich samples reveal magnetic phase separation, which suggests that the previously ignored interlayer coupling between the square planes plays a role in the suppression of magnetic order at x approximate to 0.6. These results highlight the complex magnetism of Sr2CuTe1-xWxO6 and hint at a new quantum critical point between 0.2 < x < 0.4.

引用

页码：501 / 513

页数：13