Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Leiden Observatory3.6k papers
- Centre National de la Recherche ScientifiqueFR2.4k papers
- Max Planck Institute for AstronomyDE1.4k papers
- European Southern ObservatoryCL1.4k papers
- Max Planck Institute for Extraterrestrial PhysicsDE1.3k papers
- California Institute of TechnologyUS1.1k papers
- University of GroningenNL1.1k papers
- Center for Astrophysics Harvard & SmithsonianUS1k papers
- Royal ObservatoryGB942 papers
- University of AmsterdamNL941 papers
- University College LondonGB886 papers
- University of CambridgeGB870 papers
22 papers · 2 filters
Effects of disorder on the transmission of nodal fermions through a d-wave superconductor
J. K. Asboth, A. R. Akhmerov, M. V. Medvedyeva +1
The bulk microwave conductivity of a dirty d-wave superconductor is known to depend sensitively on the range of the disorder potential: long-range scattering enhances the conductiv…
Random-matrix theory of Andreev reflection from a topological superconductor
C. W. J. Beenakker, J. P. Dahlhaus, M. Wimmer +1
We calculate the probability distribution of the Andreev reflection eigenvalues R_n at the Fermi level in the circular ensemble of random-matrix theory. Without spin-rotation symme…
Quantum interference effects in a system of two tunnel point-contacts in the presence of single scatterer: simulation of a double-tip STM experiment
N. V. Khotkevych, Yu. A. Kolesnichenko, J. M. van Ruitenbeek
The conductance of systems containing two tunnel point-contacts and a single subsurface scatterer is investigated theoretically. The problem is solved in the approximation of s-wav…
Proposal for an optical laser producing light at half the Josephson frequency
Frans Godschalk, Fabian Hassler, Yuli V. Nazarov
We describe a superconducting device capable of producing laser light in the visible range at half of the Josephson generation frequency with the optical phase of the light locked…
Weak localization in mesoscopic hole transport: Berry phases and classical correlations
Viktor Krueckl, Michael Wimmer, Inanc Adagideli +2
We consider phase-coherent transport through ballistic and diffusive two-dimensional hole systems based on the Kohn-Luttinger Hamiltonian. We show that intrinsic heavy-hole light-h…
Quantized conductance at the Majorana phase transition in a disordered superconducting wire
A. R. Akhmerov, J. P. Dahlhaus, F. Hassler +2
Superconducting wires without time-reversal and spin-rotation symmetries can be driven into a topological phase that supports Majorana bound states. Direct detection of these zero-…
Conductivity of interacting massless Dirac particles in graphene: Collisionless regime
Vladimir Juricic, Oskar Vafek, Igor F. Herbut
We provide detailed calculation of the a.c. conductivity in the case of 1/r-Coulomb interacting massless Dirac particles in graphene in the collisionless limit when ω>> T. The anal…
Geodesic scattering by surface deformations of a topological insulator
J. P. Dahlhaus, C. -Y. Hou, A. R. Akhmerov +1
We consider the classical ballistic dynamics of massless electrons on the conducting surface of a three-dimensional topological insulator, influenced by random variations of the su…
Electronic States of Graphene Grain Boundaries
Andrej Mesaros, Stefanos Papanikolaou, C. F. J. Flipse +2
We introduce a model for amorphous grain boundaries in graphene, and find that stable structures can exist along the boundary that are responsible for local density of states enhan…
Straining the Identity of Majorana Fermions
Andrej Mesaros, Stefanos Papanikolaou, Jan Zaanen
We propose an experimental setup of an interferometer for the observation of neutral Majorana fermions on topological insulator - superconductor - ferromagnet junctions. We show th…
Piezoconductivity of gated suspended graphene
M. V. Medvedyeva, Ya. M. Blanter
We investigate the conductivity of graphene sheet deformed over a gate. The effect of the deformation on the conductivity is twofold: The lattice distortion can be represented as p…
Flat-lens focusing of electrons on the surface of a topological insulator
F. Hassler, A. R. Akhmerov, C. W. J. Beenakker
We propose the implementation of an electronic Veselago lens on the conducting surface of a three-dimensional topological insulator (such as Bi2Te3). The negative refraction needed…
Anyonic interferometry without anyons: How a flux qubit can read out a topological qubit
F. Hassler, A. R. Akhmerov, C. -Y. Hou +1
Proposals to measure non-Abelian anyons in a superconductor by quantum interference of vortices suffer from the predominantly classical dynamics of the normal core of an Abrikosov…
Theory of oscillations in the STM conductance resulting from subsurface defects (Review Article)
Ye. S. Avotina, Yu. A. Kolesnichenko, J. M. van Ruitenbeek
In this review we present recent theoretical results concerning investigations of single subsurface defects by means of a scanning tunneling microscope (STM). These investigations…
Effective mass and tricritical point for lattice fermions localized by a random mass
M. V. Medvedyeva, J. Tworzydło, C. W. J. Beenakker
This is a numerical study of quasiparticle localization in symmetry class \textit{BD} (realized, for example, in chiral \textit{p}-wave superconductors), by means of a staggered-fe…
Random-matrix theory of thermal conduction in superconducting quantum dots
J. P. Dahlhaus, B. Béri, C. W. J. Beenakker
We calculate the probability distribution of the transmission eigenvalues T_n of Bogoliubov quasiparticles at the Fermi level in an ensemble of chaotic Andreev quantum dots. The fo…
Robustness of edge states in graphene quantum dots
M. Wimmer, A. R. Akhmerov, F. Guinea
We analyze the single particle states at the edges of disordered graphene quantum dots. We show that generic graphene quantum dots support a number of edge states proportional to c…
Absence of a metallic phase in charge-neutral graphene with a random gap
J. H. Bardarson, M. V. Medvedyeva, J. Tworzydlo +2
It is known that fluctuations in the electrostatic potential allow for metallic conduction (nonzero conductivity in the limit of an infinite system) if the carriers form a single s…
Majorana bound states without vortices in topological superconductors with electrostatic defects
M. Wimmer, A. R. Akhmerov, M. V. Medvedyeva +2
Vortices in two-dimensional superconductors with broken time-reversal and spin-rotation symmetry can bind states at zero excitation energy. These socalled Majorana bound states tra…
Effect of Curvature on the Electronic Structure and Bound State Formation in Rolled-up Nanotubes
Carmine Ortix, Jeroen van den Brink
We analyze the electronic properties of a two-dimensional electron gas rolled-up into a nanotube by both numerical and analytical techniques. The nature and the energy dispersion o…
Nonzero temperature effects on antibunched photons emitted by a quantum point contact out of equilibrium
I. C. Fulga, F. Hassler, C. W. J. Beenakker
Electrical current fluctuations in a single-channel quantum point contact can produce photons (at frequency omega close to the applied voltage V x e/hbar) which inherit the sub-Poi…
How to find conductance tensors of quantum multi-wire junctions through static calculations: application to an interacting Y-junction
Armin Rahmani, Chang-Yu Hou, Adrian Feiguin +2
Conductance is related to dynamical correlation functions which can be calculated with \textit{time-dependent} methods. Using boundary conformal field theory, we relate the conduct…