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Quantifying quasiparticle chirality in a chiral topological semimetal
Jiaju Wang, Jaime Sánchez-Barriga, Amit Kumar +17
Recently, the projection of the electron's spin on its crystal momentum has been proposed as a metric to quantify electronic chirality of Bloch states in crystals, which is expecte…
Observation of Chiral Surface State in Superconducting NbGe
Mengyu Yao, Martin Gutierrez-Amigo, Subhajit Roychowdhury +5
The interplay between topology and superconductivity in quantum materials harbors rich physics ripe for discovery. In this study, we investigate the topological properties and supe…
Parallel spin-momentum locking in a chiral topological semimetal
Jonas A. Krieger, Samuel Stolz, Inigo Robredo +23
Spin-momentum locking in solids describes a directional relationship between the electron's spin angular momentum and its linear momentum over the entire Fermi surface. While ortho…
What's knot to like? Observation of a linked loop quantum state
Ilya Belopolski, Guoqing Chang, Tyler A. Cochran +22
Quantum phases can be classified by topological invariants, which take on discrete values capturing global information about the quantum state. Over the past decades, these invaria…
Signature of band inversion in the antiferromagnetic phase of axion insulator candidate EuIn2As2
Takafumi Sato, Zhiwei Wang, Daichi Takane +12
We have performed angle-resolved photoemission spectroscopy on EuIn2As2 which is predicted to be an axion insulator in the antiferromagnetic state. By utilizing soft-x-ray and vacu…
Unusual Valence State in the Antiperovskites SrSnO and SrPbO Revealed by X-ray Photoelectron Spectroscopy
D. Huang, H. Nakamura, K. Küster +6
The class of antiperovskite compounds O ( = Ca, Sr, Ba; = Sn, Pb) has attracted interest as a candidate 3D Dirac system with topological surface states protected by cr…