71 citations · 358 across the 25 of their papers we have counts for
25 papers
Size and Impurity Effects on Scattering of Valley Hall Modes in Gate-Defined Bilayer Graphene Superlattices
Marcus N. Kanestrøm, Antonio L. R. Manesco, D. O. Oriekhov
In the present paper we perform a tight-binding simulation of gate-defined islands in Bernal bilayer graphene (BLG). The inversion of the gap sign on the boundaries of the islands…
Twist-modulated magnetic interactions in bilayer van der Waals materials
Tomas T. Osterholt, D. O. Oriekhov, Lumen Eek +2
The ability to control magnetic interactions at the nanoscale is crucial for the development of next-generation spintronic devices and functional magnetic materials. In this work,…
Why is topology hard to learn?
D. O. Oriekhov, Stan Bergkamp, Guliuxin Jin +5
Much attention has been devoted to the use of machine learning to approximate physical concepts. Yet, due to challenges in interpretability of machine learning techniques, the ques…
RKKY quadratic and biquadratic spin-spin interactions in twisted bilayer graphene
D. O. Oriekhov, T. T. Osterholt, R. A. Duine +1
We study the competition between the RKKY quadratic and biquadratic spin-spin interactions of two magnetic impurities in twisted bilayer graphene away from the magic angle. We appl…
Density of states and differential entropy in Dirac materials in crossed magnetic and in-plane electric fields
Andrii A. Chaika, Yelizaveta Kulynych, D. O. Oriekhov +1
The density of states and differential entropy per particle are analyzed for Dirac-like electrons in graphene subjected to a perpendicular magnetic field and an in-plane electric f…
Topological finite size effect in one-dimensional chiral symmetric systems
Guliuxin Jin, D. O. Oriekhov, Lukas Johannes Splitthoff +1
Topological phases of matter have been widely studied for their robustness against impurities and disorder. The broad applicability of topological materials relies on the reliable…
Dynamical localization in 2D topological quantum random walks
D. O. Oriekhov, Guliuxin Jin, Eliska Greplova
We study the dynamical localization of discrete time evolution of topological split-step quantum random walk (QRW) on a single-site defect starting from a uniform distribution. Usi…
Electron binding energy of a donor in bilayer graphene with gate-tunable gap
E. V. Gorbar, V. P. Gusynin, D. O. Oriekhov +1
In gapped bilayer graphene, similarly to conventional semiconductors, Coulomb impurities (such as nitrogen donors) may determine the activation energy of its conductivity and provi…
Optical conductivity of bilayer dice lattices
P. O. Sukhachov, D. O. Oriekhov, E. V. Gorbar
We calculate optical conductivity for bilayer dice lattices in commensurate vertically aligned stackings. The interband optical conductivity reveals a rich activation behavior uniq…
Landau quantization near generalized Van Hove singularities: Magnetic breakdown and orbit networks
V. A. Zakharov, A. Mert Bozkurt, A. R. Akhmerov +1
We develop a theory of magnetic breakdown (MB) near high-order saddle points in the dispersions of two-dimensional materials, where two or more semiclassical cyclotron orbits appro…
Kondo effect in twisted bilayer graphene
A. S. Shankar, D. O. Oriekhov, Andrew K. Mitchell +1
The emergence of flat bands in twisted bilayer graphene at the magic angle can be understood in terms of a vanishing Fermi velocity of the Dirac cone. This is associated with van H…
Stackings and effective models of bilayer dice lattices
P. O. Sukhachov, D. O. Oriekhov, E. V. Gorbar
We introduce and classify nonequivalent commensurate stackings for bilayer dice or lattice. For each of the four stackings with vertical alignment of sites in two l…
Breathing mode in open-orbit magnetotransport: a magnetic lens with a quantum mechanical focal length
D. O. Oriekhov, T. T. Osterholt, T. Vakhtel +2
We consider the propagation of electrons in a lattice with an anisotropic dispersion in the -- plane (lattice constant ), such that it supports open orbits along the -a…
Optical conductivity of semi-Dirac and pseudospin-1 models: Zitterbewegung approach
D. O. Oriekhov, V. P. Gusynin
We present a method to calculate the optical conductivity of semi-Dirac and pseudospin models based on the evaluation of quasiparticle velocity correlators which also describe the…
Bloch oscillations in the magnetoconductance of twisted bilayer graphene
T. Vakhtel, D. O. Oriekhov, C. W. J. Beenakker
We identify a mapping between two-dimensional (2D) electron transport in a minimally twisted graphene bilayer and a 1D quantum walk, where one spatial dimension plays the role of t…
Differential entropy per particle as a probe of van Hove singularities and flat bands
Yelizaveta Kulynych, D. O. Oriekhov
In the present paper we derive the general expressions for the differential entropy per particle near van Hove singularities (vHs) in the density of states. The dependence of entro…
Voltage staircase in a current-biased quantum-dot Josephson junction
D. O. Oriekhov, Y. Cheipesh, C. W. J. Beenakker
We calculate the current-voltage (I-V) characteristic of a Josephson junction containing a resonant level in the weakly coupled regime (resonance width small compared to the superc…
Gap generation and flat band catalysis in dice model with local interaction
E. V. Gorbar, V. P. Gusynin, D. O. Oriekhov
The gap generation in the dice model with local four-fermion interaction is studied. Due to the presence of two valleys with degenerate electron states, there are two main types of…
Orbital susceptibility of T-graphene: Interplay of high-order van Hove singularities and Dirac cones
D. O. Oriekhov, V. P. Gusynin, V. M. Loktev
Square-octagon lattice underlies the description of a family of two-dimensional materials such as tetragraphene. In the present paper we show that the tight-binding model of square…
Half-integer charge injection by a Josephson junction without excess noise
F. Hassler, A. Grabsch, M. J. Pacholski +4
A Josephson junction in a topological superconductor can inject a charge e/2 into a normal-metal contact, carried by chiral Majorana edge modes. Here we address the question whethe…
RKKY interaction in a doped pseudospin-1 fermion system at finite temperature
D. O. Oriekhov, V. P. Gusynin
We study the RKKY interaction of magnetic impurities in the model which hosts pseudospin-1 fermions with two dispersive and one flat bands. By using the effective…
Plasmon Resonances and Tachyon Ghost Modes in Highly Conducting Sheets
D. O. Oriekhov, L. S. Levitov
Plasmon-polariton modes in two-dimensional electron gases have a dual field-matter nature that endows them with unusual properties when electrical conductivity exceeds a certain th…
Electron states for gapped pseudospin-1 fermions in the field of charged impurity
E. V. Gorbar, V. P. Gusynin, D. O. Oriekhov
The electron states of gapped pseudospin-1 fermions of the lattice in the Coulomb field of a charged impurity are studied. The free model has three di…
Electronic states of pseudospin-1 fermions in dice lattice ribbons
D. O. Oriekhov, E. V. Gorbar, V. P. Gusynin
Boundary conditions for the two-dimensional fermions in ribbons of the hexagonal lattice are studied in the dice model whose energy spectrum in infinite system consists of three ba…