Visualization of Tunable Weyl Line in A-A Stacking Kagome Magnets

被引：4

作者：

Cheng, Zi-Jia ^{[1
]}

Belopolski, Ilya ^{[1
]}

Tien, Hung-Ju ^{[2
]}

Cochran, Tyler A. ^{[1
]}

Yang, Xian P. ^{[1
]}

Ma, Wenlong ^{[3
]}

Yin, Jia-Xin ^{[1
]}

Chen, Dong ^{[4
]}

Zhang, Junyi ^{[5
]}

Jozwiak, Chris ^{[6
]}

Bostwick, Aaron ^{[6
]}

Rotenberg, Eli ^{[6
]}

Cheng, Guangming ^{[7
]}

Hossain, Md. Shafayat ^{[1
]}

Zhang, Qi ^{[1
]}

Litskevich, Maksim ^{[1
]}

Jiang, Yu-Xiao ^{[1
]}

Yao, Nan ^{[7
]}

Schroeter, Niels B. M. ^{[8
]}

Strocov, Vladimir N. ^{[8
]}

Lian, Biao ^{[5
]}

Felser, Claudia ^{[4
]}

Chang, Guoqing ^{[9
]}

Jia, Shuang ^{[3
]}

Chang, Tay-Rong ^{[2
,10
,11
]}

Hasan, M. Zahid ^{[1
,12
]}

机构：

[1] Princeton Univ, Dept Phys, Lab Topol Quantum Matter & Adv Spect B7, Princeton, NJ 08544 USA

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 70101, Taiwan

[3] Peking Univ, Int Ctr Quantum Mat, Sch Phys, Beijing 100871, Peoples R China

[4] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[5] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[6] EO Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[7] Princeton Univ, Princeton Inst Sci & Technol Mat, Princeton, NJ 08544 USA

[8] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[9] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, 21 Nanyang Link, Singapore 637371, Singapore

[10] Ctr Quantum Frontiers Res & Technol QFort, Tainan 701, Taiwan

[11] Natl Ctr Theoret Sci, Phys Div, Taipei 10617, Taiwan

[12] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

来源：

ADVANCED MATERIALS | 2023年 / 35卷 / 03期

基金：

美国国家科学基金会; 欧洲研究理事会; 新加坡国家研究基金会; 美国能源部; 中国国家自然科学基金;

关键词：

ARPES; kagome; Kane-Mele; spin-orbit coupling; tunability; Weyl semimetal; DISCOVERY; FERMIONS;

D O I：

10.1002/adma.202205927

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Kagome magnets provide a fascinating platform for a plethora of topological quantum phenomena, in which the delicate interplay between frustrated crystal structure, magnetization, and spin-orbit coupling (SOC) can engender highly tunable topological states. Here, utilizing angle-resolved photoemission spectroscopy, the Weyl lines are directly visualized with strong out-of-plane dispersion in the A-A stacked kagome magnet GdMn6Sn6. Remarkably, the Weyl lines exhibit a strong magnetization-direction-tunable SOC gap and binding energy tunability after substituting Gd with Tb and Li, respectively. These results not only illustrate the magnetization direction and valence counting as efficient tuning knobs for realizing and controlling distinct 3D topological phases, but also demonstrate AMn(6)Sn(6) (A = rare earth, or Li, Mg, or Ca) as a versatile material family for exploring diverse emergent topological quantum responses.

引用

页数：8

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