Imaging Orbital Vortex Lines in Three-Dimensional Momentum Space

被引：0

作者：

Figgemeier, T. ^{[1
]}

Uenzelmann, M. ^{[1
]}

Eck, P. ^{[2
,3
]}

Schusser, J. ^{[1
,4
]}

Crippa, L. ^{[2
,3
]}

Neu, J. N. ^{[5
,6
]}

Geldiyev, B. ^{[1
]}

Kagerer, P. ^{[1
]}

Buck, J. ^{[7
,8
,9
]}

Kallaene, M. ^{[7
,8
,9
]}

Hoesch, M. ^{[10
]}

Rossnagel, K. ^{[7
,8
,9
,10
]}

Siegrist, T. ^{[5
,6
]}

Lim, L. -k. ^{[11
]}

Moessner, R. ^{[12
,13
]}

Sangiovanni, G. ^{[2
,3
]}

Di Sante, D. ^{[14
]}

Reinert, F. ^{[1
]}

Bentmann, H. ^{[1
,15
]}

机构：

[1] Univ Wurzburg, Expt Phys & Wurzburg Dresden Cluster Excellence Ct, D-97074 Wurzburg, Germany

[2] Univ Wurzburg, ITPA, D-97074 Wurzburg, Germany

[3] Univ Wurzburg, Wurzburg Dresden Cluster Excellence Ct Qmat, D-97074 Wurzburg, Germany

[4] Univ West Bohemia Pilsen, New Technol Res Ctr, Plzen 30614, Czech Republic

[5] FAMU FSU, Dept Chem & Biomed Engn, Coll Engn, Tallahassee, FL 32310 USA

[6] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[7] Christian Albrechts Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany

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

[9] DESY, D-22607 Hamburg, Germany

[10] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[11] Zhejiang Univ, Zhejiang Inst Modern Phys, Hangzhou 310027, Zhejiang, Peoples R China

[12] Max Planck Inst Phys Komplexer Syst, Noethnitzer Str 38, D-01187 Dresden, Germany

[13] Wurzburg Dresden Cluster Excellence Ct Qmat, D-01187 Dresden, Germany

[14] Univ Bologna, Dept Phys & Astron, I-40127 Bologna, Italy

[15] NTNU Norwegian Univ Sci & Technol, Ctr Quantum Spintron, Dept Phys, NO-7491 Trondheim, Norway

来源：

PHYSICAL REVIEW X | 2025年 / 15卷 / 01期

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

SEMIMETAL; SURFACE;

D O I：

10.1103/PhysRevX.15.011032

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the experimental discovery of orbital vortex lines in the three-dimensional (3D) band structure of a topological semimetal. Combining linear and circular dichroism in soft x-ray angle-resolved photoemission (SX-ARPES) with first-principles theory, we image the winding of atomic orbital angular momentum, thereby revealing-and determining the location of-lines of vorticity in full 3D momentum space. We determine the core of the orbital angular momentum vortex to host an almost movable, twofold, spin-degenerate Weyl nodal line, a topological feature predicted to occur in certain nonsymmorphic crystals. These results establish bimodal dichroism in SX-ARPES as a robust approach to trace 3D orbital textures. Our findings constitute the first imaging of nontrivial quantum-phase winding at line nodes and may pave the way to new orbitronic phenomena in quantum materials.

引用

页数：10

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