85 citations · 493 across the 36 of their papers we have counts for
19 papers · 1 filter
One-way electron mirrors from single-layer stacking shifts in rhombohedral graphite
Konrád Kandrai, András Balogh, Dóra Varga +11
One-way mirrors or asymmetric scatterers are key components of photonic systems, protecting sources from back-reflections and routing light along a chosen path. Acoustic systems ca…
Signature of pressure-induced topological phase transition in ZrTe
Zoltán Kovács-Krausz, Dániel Nagy, Albin Márffy +9
The layered van der Waals material ZrTe is known as a candidate topological insulator (TI), however its topological phase and the relation with other properties such as an appa…
Surface magnon spectra of nodal loop semimetals
Assem Alassaf, János Koltai, László Oroszlány
In this paper we establish a connection between the bulk topological structure and the magnetic properties of drumhead surface states of nodal loop semimetals. We identify the magn…
Revealing the band structure of ZrTe using Multicarrier Transport
Zoltán Kovács-Krausz, Endre Tóvári, Dániel Nagy +9
The layered material ZrTe appears to exhibit several exotic behaviors which resulted in significant interest recently, although the exact properties are still highly debated. A…
Observation of competing, correlated ground states in the flat band of rhombohedral graphite
Imre Hagymási, Mohammad Syahid Mohd Isa, Zoltán Tajkov +10
In crystalline solids the interactions of charge and spin can result in a variety of emergent quantum ground states, especially in partially filled, topological flat bands such as…
Linearly controlled arrangement of C isotopes in single-wall carbon nanotubes
J. Koltai, H. Kuzmany, T. Pichler +1
The growth of single wall carbon nanotubes (SWCNT) inside host SWCNTs remains a compelling alternative to the conventional catalyst induced growth processes. It not only provides a…
Competition of trivial and topological phases in patterned graphene based heterostructures
Zoltán Tajkov, János Koltai, József Cserti +1
We explore the effect of mechanical strain on the electronic spectrum of patterned graphene based heterostructures. We focus on the competition of Kekulé-O type distortion favoring…
Uniaxial Strain Induced Topological Phase Transition in Bismuth-Tellurohalide-Graphene Heterostructures
Zoltán Tajkov, Dávid Visontai, László Oroszlány +1
We explore the electronic structure and topological phase diagram of heterostructures formed of graphene and ternary bismuth tellurohalide layers. We show that mechanical strain in…
Magic number theory of superconducting proximity effects and Wigner delay times in graphene-like molecules
Péter Rakyta, Asma Alanazy, Andor Kormányos +7
When a single molecule is connected to external electrodes by linker groups, the connectivity of the linkers to the molecular core can be controlled to atomic precision by appropri…
Large intravalley scattering due to pseudo-magnetic fields in crumpled graphene
Péter Kun, Gergő Kukucska, Gergely Dobrik +5
The pseudo-magnetic field generated by mechanical strain in graphene can have dramatic consequences on the behavior of electrons and holes. Here we show that pseudo-magnetic field…
Exfoliation of single layer BiTeI flakes
Bálint Fülöp, Zoltán Tajkov, János Pető +9
Spin orbit interaction can be strongly boosted when a heavy element is embedded into an inversion asymmetric crystal field. A simple structure to realize this concept in a 2D cryst…
Preparing local strain patterns in graphene by atomic force microscope based indentation
Péter Nemes-Incze, Gergő Kukucska, János Koltai +4
Patterning graphene into various mesoscopic devices such as nanoribbons, quantum dots, etc. by lithographic techniques has enabled the guiding and manipulation of graphene's Dirac-…
I-band-like non-dispersive inter-shell interaction induced Raman lines in the D band region of double-walled carbon nanotubes
Bálint Gyimesi, János Koltai, Viktor Zólyomi +1
Non-dispersive, inter-layer interaction induced Raman peaks (I bands) -- in the region of the D band -- have been observed recently for bilayer graphene, when the two layers were r…
Catastrophe optics of caustics in single and bilayer graphene: fine structure of caustics
Csaba Péterfalvi, András Pályi, Ádám Rusznyák +2
We theoretically study the scattering of a plane wave of a ballistic electron on a circular n-p junction in single and bilayer graphene. We compare the exact wave function inside t…
Nonthermal broadening in the conductance of double quantum dot structures
Laszlo Oroszlany, Andor Kormanyos, Janos Koltai +2
We study the transport properties of a double quantum dot (DQD) molecule at zero and at finite temperature. The properties of the zero temperature conductance depends on whether th…
Non-local current correlations in ferromagnet/superconductor nanojunctions
C. J. Lambert, J. Koltai, J. Cserti
When two fully polarized ferromagnetic (F) wires with opposite polarizations make contact with a spin-singlet superconductor, a potential-induced current in wire 1 induces a non-lo…
Andreev bound states for superconducting-ferromagnetic box
J. Cserti, J. Koltai, C. J. Lambert
Within the microscopic Bogoliubov--de Gennes (BdG) formalism an exact quantization condition for Andreev bound states of the ferromagnetic-superconducting hybrid systems of box geo…
Proximity-induced sub-gaps in Andreev billiards
J. Cserti, A. Kormányos, Z. Kaufmann +2
We examine the density of states of an Andreev billiard and show that any billiard with a finite upper cut-off in the path length distribution will possess an energy gap on…
Excitation spectra for Andreev billiards of Box and Disk geometries
J. Cserti, A. Bodor, J. Koltai +1
We study Andreev billiards of box and disk geometries by matching the wave functions at the interface of the normal and the superconducting region using the exact solutions of the…