High-Angular Momentum Excitations in Collinear Antiferromagnet FePS3

被引：8

作者：

Wyzula, Jan ^{[1
,2
]}

Mohelsky, Ivan ^{[1
]}

Vaclaykoya, Diana ^{[1
]}

Kapuscinski, Piotr ^{[1
]}

Veis, Martin ^{[3
]}

Faugeras, Clement ^{[1
]}

Potemski, Marek ^{[4
]}

Zhitomirsky, Mike E. ^{[5
]}

Orlita, Milan ^{[1
,2
]}

机构：

[1] Univ Grenoble Alpes, Univ Toulouse, Univ Toulouse 3,EMFL, INSA T,Lab Natl Champs Magnet Intenses,CNRS UPR32, Grenoble, France

[2] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[3] Charles Univ Prague, Inst Phys, CZ-12116 Prague, Czech Republic

[4] Inst High Pressure Phys, CENTERA Labs, PAS, PL-01142 Warsaw, Poland

[5] Univ Grenoble Alpes, PHELIQS, IRIG, CEA, F-38000 Grenoble, France

来源：

NANO LETTERS | 2022年 / 22卷 / 23期

基金：

瑞士国家科学基金会;

关键词：

Magnon; THz; infrared magneto-spectroscopy; 2D antiferromagnets; van der Waals materials; antiferromagnetic resonance; 2-MAGNON BOUND-STATES; RAMAN-SCATTERING; RESONANCE; ANISOTROPY; CHAINS;

D O I：

10.1021/acs.nanolett.2c04111

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on magneto-optical studies of the quasi-two-dimensional van der Waals antiferromagnet FePS3. Our measurements reveal an excitation that closely resembles the antiferromagnetic resonance mode typical of easy-axis antiferromagnets; nevertheless, it displays an unusual, four-times larger Zeeman splitting in an applied magnetic field. We identify this excitation with an |Sz| = 4 multipolar magnon-a single-ion 4-magnon bound state -that corresponds to a full reversal of a single magnetic moment of the Fe2+ion. We argue that condensation of multipolar magnons in large-spin materials with a strong magnetic anisotropy can produce new exotic states.

引用

页码：9741 / 9747

页数：7

共 50 条

[1] 2-MAGNON EXCITATIONS IN THE HEISENBERG-FERROMAGNET WITH UNIAXIAL ANISOTROPY [J].