Spin-wave dynamics in the KCeS2 delafossite: A theoretical description of powder inelastic neutron-scattering data

被引：6

作者：

Avdoshenko, Stanislav M. ^{[1
]}

Kulbakov, Anton A. ^{[2
]}

Haeussler, Ellen ^{[3
]}

Schlender, Philipp ^{[3
]}

Doert, Thomas ^{[3
]}

Ollivier, Jacques ^{[4
]}

Inosov, Dmytro S. ^{[2
,5
]}

机构：

[1] Leibniz Inst Festkorper & Werkstoffforsch IFW Dres, Helmholtzstr 20, D-01069 Dresden, Germany

[2] Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01069 Dresden, Germany

[3] Tech Univ Dresden, Fak Chem & Lebensmittelchemie, D-01062 Dresden, Germany

[4] Inst Laue Langevin, CS 20156, 71 Ave Martyrs, F-38042 Grenoble 9, France

[5] Tech Univ Dresden, Wurzburg Dresden Cluster Excellence Complex & Topo, D-01069 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2022年 / 106卷 / 21期

关键词：

LIQUID; REALIZATION; ORDER;

D O I：

10.1103/PhysRevB.106.214431

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Layered rare-earth delafossites ARX(2) with R = Yb(III) or Ce(III) received a lot of interest as potential hosts for a quantum spin-liquid ground state. Some systems of this family that show no long-range order down to the lowest-measured temperatures, such as NaYbO2, NaYbS2, and NaYbSe2, are presumed to be in a quantum spin-liquid state. However, other isostructural compounds are known to order antiferromagnetically at subkelvin temperatures. Among them, KCeS2 exhibits stripe-yz magnetic order in the triangular-lattice planes that sets in below 400 mK. Here we investigate the spin-wave spectrum of this ordered phase with powder inelastic neutron scattering and describe it using a model Hamiltonian obtained from first-principles calculations based on the complete vertical bar J, m(J)> mmultiplet description of the Ce sites with an anisotropic nearest-neighbor exchange interaction. Combining the current understanding of the exchange interaction in the systems with the effects of texturing in the powder, we are able to model the inelastic neutron scattering spectrum with high fidelity.

引用

页数：7