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Magnetically ordered and kagome quantum spin liquid states in the Zn-doped claringbullite series

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PHYSICAL REVIEW B
卷 107, 期 2, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.107.024416

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Neutron scattering measurements were conducted on deuterated powder samples of claringbullite and Zn-doped claringbullite [ZnxCu4-x(OD)6FCl]. At low temperatures, claringbullite Cu4(OD)6FCl exhibits long-range magnetic order and spin-wave-like magnetic excitations due to its distorted pyrochlore lattice. Partial Zn doping results in the formation of ZnCu3(OD)6FCl compound, a geometrically frustrated spin-1/2 kagome antiferromagnet, which displays no transition to magnetic order down to 1.5 K and exhibits a gapless continuum of magnetic excitations, indicating the presence of fractional excitations in a quantum spin liquid.
Neutron scattering measurements have been performed on deuterated powder samples of claringbullite and Zn-doped claringbullite [ZnxCu4-x(OD)6FCl]. At low temperatures, claringbullite Cu4(OD)6FCl forms a distorted pyrochlore lattice with long-range magnetic order and spin-wave-like magnetic excitations. Partial Zn doping leads to the nominal ZnCu3(OD)6FCl compound, a geometrically frustrated spin-1/2 kagome antiferromagnet that shows no transition to magnetic order down to 1.5 K. The magnetic excitations form a gapless continuum, a signature of fractional excitations in a quantum spin liquid.

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