Spin-orbital excitations encoding the magnetic phase transition in the van der Waals antiferromagnet FePS3

被引：0

作者：

Wei, Yuan ^{[1
]}

Tseng, Yi ^{[1
,2
,7
]}

Elnaggar, Hebatalla ^{[3
]}

Zhang, Wenliang ^{[1
]}

Asmara, Teguh Citra ^{[1
]}

Paris, Eugenio ^{[1
]}

Domaine, Gabriele ^{[1
,2
]}

Strocov, Vladimir N. ^{[1
]}

Testa, Luc ^{[2
]}

Favre, Virgile ^{[2
]}

Di Luca, Mario ^{[4
]}

Banerjee, Mitali ^{[4
]}

Wildes, Andrew R. ^{[5
]}

de Groot, Frank M. F. ^{[6
]}

Ronnow, Henrik M. ^{[2
]}

Schmitt, Thorsten ^{[1
]}

机构：

[1] Paul Scherrer Inst, PSI Ctr Photon Sci, CH-5232 Villigen, Switzerland

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

[3] Sorbonne Univ, Inst Mineral Phys Mat & Cosmochimi, UMR 7590, CNRS, 4 Pl Jussieu, F-75005 Paris, France

[4] Ecole Polytech Fed Lausanne, Inst Phys, Lab Quantum Phys Topol & Correlat, CH-1015 Lausanne, Switzerland

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

[6] Univ Utrecht, Debye Inst Nanomat Sci, NL-3584 CG Utrecht, Netherlands

[7] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

来源：

NPJ QUANTUM MATERIALS | 2025年 / 10卷 / 01期

基金：

瑞士国家科学基金会; 荷兰研究理事会;

关键词：

X-RAY PHOTOEMISSION; SPECTRA; ABSORPTION; FERROMAGNETISM; VISUALIZATION; CRYSTAL; ABSENCE; FE;

D O I：

10.1038/s41535-025-00777-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Van der Waals (vdW) materials are featuring intertwined electronic order and collective phenomena. Elucidating the dynamics of the elementary excitations within the fundamental electronic degrees of freedom is of paramount importance. Here we performed resonant inelastic X-ray scattering (RIXS) to elaborate the spin-orbital excitations of the vdW antiferromagnet FePS3 and their role for magnetism. We observed the spectral enhancement of spin-orbital multiplet excitations at about similar to 100 and similar to 220 meV, as well as the quasielastic response, when entering the antiferromagnetic phase with an order-parameter-like evolution in temperature. By comparing with model calculations, we discovered the trigonal lattice distortion, spin-orbit interaction and metal-ligand charge-transfer to be essential for these emergent excitations. We further reveal their spectral robustness down to the few atomic-layer limit by mechanical exfoliation, in accordance with the persistent antiferromagnetism reported previously. Our study highlights the crucial role of lattice and orbital anisotropy for stabilizing the quasi-two-dimensional magnetism and tailoring vdW magnets.

引用

页数：10