61 citations · 189 across the 8 of their papers we have counts for
8 papers
Stability of Weyl node merging processes under symmetry constraints
Gabriele Naselli, György Frank, Dániel Varjas +4
Changes in the number of Weyl nodes in Weyl semimetals occur through merging processes, usually involving a pair of oppositely charged nodes. More complicated processes involving m…
Non-Hermitian topological ohmmeter
Viktor Könye, Kyrylo Ochkan, Anastasiia Chyzhykova +4
Measuring large electrical resistances forms an essential part of common applications such as insulation testing, but suffers from a fundamental problem: the larger the resistance,…
Observation of non-Hermitian topology in a multi-terminal quantum Hall device
Kyrylo Ochkan, Raghav Chaturvedi, Viktor Könye +10
Quantum devices characterized by non-Hermitian topology are predicted to show highly robust and potentially useful properties, but realizing them has remained a daunting experiment…
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…
Landau level collapse in graphene in the presence of in-plane radial electric and perpendicular magnetic fields
I. O. Nimyi, V. Könye, S. G. Sharapov +1
It is known that in two-dimensional relativistic Dirac systems placed in orthogonal uniform magnetic and electric fields, the Landau levels collapse as the applied in-plane electri…
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…
Chirality flip of Weyl nodes and its manifestation in strained MoTe
Viktor Könye, Adrien Bouhon, Ion Cosma Fulga +3
Due to their topological charge, or chirality, the Weyl cones present in topological semimetals are considered robust against arbitrary perturbations. One well-understood exception…
Microscopic theory of magnetoconductivity at low magnetic fields in terms of Berry curvature and orbital magnetic moment
Viktor Könye, Masao Ogata
Using a microscopic theory for the magnetoconductivity at low magnetic fields we show how the Hall and longitudinal conductivity can be calculated in the low scattering rate limit.…