Observation of Coherent Gapless Magnons in an Antiferromagnet

被引：1

作者：

Chen, Jilei ^{[1
,2
]}

Jin, Zhejunyu ^{[3
]}

Yuan, Rundong ^{[4
,5
]}

Wang, Hanchen ^{[5
,6
]}

Jia, Hao ^{[1
,2
]}

Wei, Weiwei ^{[1
,2
]}

Sheng, Lutong ^{[1
,5
]}

Wang, Jinlong ^{[5
]}

Zhang, Yuelin ^{[5
,7
]}

Liu, Song ^{[1
,2
]}

Yu, Dapeng ^{[1
,2
]}

Ansermet, Jean-Philippe ^{[2
,8
]}

Yan, Peng ^{[3
]}

Yu, Haiming ^{[1
,2
,5
]}

机构：

[1] Int Quantum Acad, Shenzhen 518048, Peoples R China

[2] Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China

[3] Univ Elect Sci & Technol China, Sch Phys, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China

[4] Univ Cambridge, Cavendish Lab, TCM Grp, 19 JJ Thomson Ave, Cambridge CB3 0HE, England

[5] Beihang Univ, Fert Beijing Inst, Sch Integrated Circuit Sci & Engn, MIIT Key Lab Spintron, Beijing 100191, Peoples R China

[6] Swiss Fed Inst Technol, Dept Mat, CH-8093 Zurich, Switzerland

[7] Beijing Normal Univ, Sch Phys & Astron, Beijing 100875, Peoples R China

[8] Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2025年 / 134卷 / 05期

基金：

中国博士后科学基金;

关键词：

MAGNETIC DOMAIN-WALLS; SPIN-WAVES; PROPAGATION;

D O I：

10.1103/PhysRevLett.134.056701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Antiferromagnetic magnons possess high speed and are immune to external disturbance, making them promising for future magnonic circuits. In this Letter, we report the observation of gapless magnons in an easy-axis antiferromagnet alpha-Fe2O3 at low temperatures. These antiferromagnetic magnons are detected at nearly zero frequency by all-electrical spin-wave spectroscopy and propagate along antiferromagnetic domain walls as revealed by our theoretical model and simulations. Moreover, we demonstrate high coherency of these gapless magnons by showing their strong coupling with microwave photons. Our results open the pathway for antiferromagnetic texture based magnonic devices operating at microwave frequencies.

引用

页数：7

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