64 citations · 145 across the 7 of their papers we have counts for
7 papers
Robust Signatures of Fragile Topology in Nonmagnetic Materials
Viktor Könye, Ihor Nimyi, Oleg Janson +3
Some topological phases of matter are called fragile. They can be trivialized by adding additional valence bands and do not generically host protected gapless boundary states. Here…
Non-unitary Time Evolution via the Chebyshev Expansion Method
Áron Holló, Dániel Varjas, Cosma Fulga +2
The Chebyshev expansion method is a well-established technique for computing the time evolution of quantum states, particularly in Hermitian systems with a bounded spectrum. Here,…
Topological Weyl Altermagnetism in CrSb
Cong Li, Mengli Hu, Zhilin Li +12
Altermagnets constitute a novel, third fundamental class of collinear magnetic ordered materials, alongside with ferro- and antiferromagnets. They share with conventional antiferro…
Topological fine structure of an energy band
Hui Liu, Cosma Fulga, Emil J. Bergholtz +1
A band with a nonzero Chern number cannot be fully localized by weak disorder. There must remain at least one extended state, which ``carries the Chern number.'' Here we show that…
Real-space topological localizer index to fully characterize the dislocation skin effect
Nisarg Chadha, Ali G. Moghaddam, Jeroen van den Brink +1
The dislocation skin effect exhibits the capacity of topological defects to trap an extensive number of modes in two-dimensional non-Hermitian systems. Similar to the corresponding…
Nontrivial gapless electronic states at the stacking faults of weak topological insulators
Gabriele Naselli, Viktor Könye, Sanjib Kumar Das +4
Lattice defects such as stacking faults may obscure electronic topological features of real materials. In fact, defects are a source of disorder that can enhance the density of sta…
Non-Hermitian physics without gain or loss: the skin effect of reflected waves
S. Franca, V. Könye, F. Hassler +2
Physically, one tends to think of non-Hermitian systems in terms of gain and loss: the decay or amplification of a mode is given by the imaginary part of its energy. Here, we intro…