A magnetic continuum in the cobalt-based honeycomb magnet BaCo2(AsO4)2

被引：20

作者：

Zhang, Xinshu ^{[1
]}

Xu, Yuanyuan ^{[1
]}

Halloran, T. ^{[1
]}

Zhong, Ruidan ^{[2
]}

Broholm, C. ^{[1
,3
,4
]}

Cava, R. J. ^{[2
]}

Drichko, N. ^{[1
]}

Armitage, N. P. ^{[1
,5
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Inst Quantum Matter, Baltimore, MD 21218 USA

[2] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[3] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA

[5] Canadian Inst Adv Res, Toronto, ON, Canada

来源：

NATURE MATERIALS | 2023年 / 22卷 / 01期

关键词：

49;

D O I：

10.1038/s41563-022-01403-1

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 (QSLs) are topologically ordered states of matter that host fractionalized excitations. A particular route towards a QSL is via strongly bond-dependent interactions on the hexagonal lattice. A number of Ru- and Ir-based candidate Kitaev QSL materials have been pursued, but all have appreciable non-Kitaev interactions. Using time-domain terahertz spectroscopy, we observed a broad magnetic continuum over a wide range of temperatures and fields in the honeycomb cobalt-based magnet BaCo2(AsO4)(2), which has been proposed to be a more ideal version of a Kitaev QSL. Applying an in-plane magnetic field of similar to 0.5 T suppresses the magnetic order, and at higher fields, applying the field gives rise to a spin-polarized state. Under a 4 T magnetic field that was oriented principally out of plane, a broad magnetic continuum was observed that may be consistent with a field-induced QSL. Our results indicate BaCo2(AsO4)(2) is a promising QSL candidate.

引用

页码：58 / +

页数：7

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