Jonas A. Krieger

2 weeks ago | nature.com | Shafayat Hossain |Zahir Muhammad |Zurab Guguchia |Jonas A. Krieger |Yu-Xiao Jiang |Maksim Litskevich | +10 more

AbstractThe interplay between topology and superconductivity generated great interest in condensed matter physics. Here, we unveil an unconventional two-dimensional superconducting state in the Dirac nodal line semimetal ZrAs2 which is exclusively confined to the top and bottom surfaces within the crystal’s ab plane.

Sep 30, 2024 | nature.com | Yun Yen |Jonas A. Krieger |Mengyu Yao |Kaustuv Manna |Emily C. McFarlane |Chandra Shekhar | +6 more

AbstractThe emerging field of orbitronics aims to generate and control orbital angular momentum for information processing. Chiral crystals are promising orbitronic materials because they have been predicted to host monopole-like orbital textures, where the orbital angular momentum aligns isotropically with the electron’s crystal momentum. However, such monopoles have not yet been directly observed in chiral crystals.

May 2, 2024 | nature.com | Jonas A. Krieger |Kaustuv Manna |Emily C. McFarlane |Mihir Date |J. Hugo Dil |Chandra Shekhar | +10 more

AbstractSpin-orbit coupling in noncentrosymmetric crystals leads to spin-momentum locking – a directional relationship between an electron’s spin angular momentum and its linear momentum. Isotropic orthogonal Rashba spin-momentum locking has been studied for decades, while its counterpart, isotropic parallel Weyl spin-momentum locking has remained elusive in experiments.