Flat band separation and robust spin Berry curvature in bilayer kagome metals

D Di Sante, C Bigi, P Eck, S Enzner, A Consiglio… - Nature Physics, 2023 - nature.com
Kagome materials have emerged as a setting for emergent electronic phenomena that
encompass different aspects of symmetry and topology. It is debated whether the XV6Sn6 …

Measurements of the quantum geometric tensor in solids

M Kang, S Kim, Y Qian, PM Neves, L Ye, J Jung… - Nature Physics, 2024 - nature.com
Understanding the geometric properties of quantum states and their implications in
fundamental physical phenomena is a core aspect of contemporary physics. The quantum …

Controllable orbital angular momentum monopoles in chiral topological semimetals

Y Yen, JA Krieger, M Yao, I Robredo, K Manna… - Nature Physics, 2024 - nature.com
The emerging field of orbitronics aims to generate and control orbital angular momentum for
information processing. Chiral crystals are promising orbitronic materials because they have …

Unveiling the orbital texture of 1T-TiTe2 using intrinsic linear dichroism in multidimensional photoemission spectroscopy

S Beaulieu, M Schüler, J Schusser, S Dong… - npj quantum …, 2021 - nature.com
The momentum-dependent orbital character in crystalline solids, referred to as orbital
texture, is of capital importance in the emergence of symmetry-broken collective phases …

Observation of termination-dependent topological connectivity in a magnetic Weyl kagome lattice

F Mazzola, S Enzner, P Eck, C Bigi, M Jugovac… - Nano Letters, 2023 - ACS Publications
Engineering surfaces and interfaces of materials promises great potential in the field of
heterostructures and quantum matter designers, with the opportunity to drive new many …

Strongly anisotropic spin and orbital Rashba effect at a tellurium–noble metal interface

B Geldiyev, M Ünzelmann, P Eck, T Kißlinger… - Physical Review B, 2023 - APS
We study the interplay of lattice, spin, and orbital degrees of freedom in a two-dimensional
model system: a flat square lattice of Te atoms on a Au (100) surface. The atomic structure of …

Berry curvature signatures in chiroptical excitonic transitions

S Beaulieu, S Dong, V Christiansson, P Werner… - Science …, 2024 - science.org
The topology of the electronic band structure of solids can be described by its Berry
curvature distribution across the Brillouin zone. We theoretically introduce and …

Observation of asymmetric oxidation catalysis with B20 chiral crystals

G Li, Q Yang, K Manna, Y Zhang, P Merz… - Angewandte …, 2023 - Wiley Online Library
The study of heterogeneous reactions for enantiomeric processes based on inorganic
crystals has been resurgent in recent years. However, the question remains how …

Assessing nontrivial topology in weyl semimetals by dichroic photoemission

J Schusser, H Bentmann, M Ünzelmann, T Figgemeier… - Physical review …, 2022 - APS
The electronic structure of Weyl semimetals features Berry flux monopoles in the bulk and
Fermi arcs at the surface. While angle-resolved photoelectron spectroscopy (ARPES) is …

Braiding topology of symmetry-protected degeneracy points in non-Hermitian systems

JZ Li, K Bai, C Guo, TR Liu, L Fang, D Wan, M **ao - Physical Review B, 2024 - APS
Degeneracy points in non-Hermitian systems are of great interest. While a homotopic
framework exists for understanding their behavior in the absence of symmetry, it does not …