Chirality-Driven Orbital Angular Momentum and Circular Dichroism in CoSi

被引：4

作者：

Brinkman, Stefanie Suzanne ^{[1
]}

Tan, Xin Liang ^{[1
,2
,3
]}

Brekke, Bjornulf ^{[1
]}

Mathisen, Anders Christian ^{[1
]}

Finnseth, Oyvind ^{[4
]}

Schenk, Richard Justin ^{[1
]}

Hagiwara, Kenta ^{[2
,3
]}

Huang, Meng-Jie ^{[5
,6
,7
]}

Buck, Jens ^{[5
,6
,8
]}

Kallaene, Matthias ^{[5
,6
,8
]}

Hoesch, Moritz ^{[7
]}

Rossnagel, Kai ^{[5
,6
,7
,8
]}

Yang, Kui-Hon Ou ^{[9
]}

Lin, Minn-Tsong ^{[9
,10
,11
]}

Shu, Guo-Jiun ^{[1
,2
,12
]}

Chen, Ying-Jiun ^{[2
,3
,13
,14
]}

Tusche, Christian ^{[2
,3
]}

Bentmann, Hendrik ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Ctr Quantum Spintron, Dept Phys, N-7491 Trondheim, Norway

[2] Forschungszentrum Julich, Peter Grunberg Inst PGI 6, D-52425 Julich, Germany

[3] Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany

[4] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway

[5] Univ Kiel, Ruprecht Haensel Lab, D-24098 Kiel, Germany

[6] Univ Kiel, Ruprecht Haensel Lab, D-24098 Kiel, Germany

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

[8] Christian Albrechts Univ Kiel, Inst Experimentelle & Angew Phys, D-24098 Kiel, Germany

[9] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[10] Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan

[11] Acad Sinica, Res Ctr Appl Sci, Taipei 11529, Taiwan

[12] Natl Taipei Univ Technol, Dept Mat & Mineral Resources Engn, Taipei 10608, Taiwan

[13] Forschungszentrum Julich, Ernst Ruska Ctr Microscopy & Spect Electrons, D-52425 Julich, Germany

[14] Forschungszentrum Julich, Peter Grunberg Inst, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 19期

关键词：

SPIN SELECTIVITY; SURFACE; SEMIMETAL;

D O I：

10.1103/PhysRevLett.132.196402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Chiral crystals and molecules were recently predicted to form an intriguing platform for unconventional orbital physics. Here, we report the observation of chirality-driven orbital textures in the bulk electronic structure of CoSi, a prototype member of the cubic B20 family of chiral crystals. Using circular dichroism in soft x-ray angle -resolved photoemission, we demonstrate the formation of a bulk orbital -angularmomentum texture and monopolelike orbital -momentum locking that depends on crystal handedness. We introduce the intrinsic chiral circular dichroism, ic CD, as a differential photoemission observable and a natural probe of chiral electron states. Our findings render chiral crystals promising for spin-orbitronics applications.

引用

页数：7

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