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Showing 2009 · cond-mat.mes-hallShow all

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cond-mat.mes-hall2009★ 28 cited

Theory of non-Abelian Fabry-Perot interferometry in topological insulators

Johan Nilsson, A. R. Akhmerov

Interferometry of non-Abelian edge excitations is a useful tool in topological quantum computing. In this paper we present a theory of a non-Abelian edge state interferometer in a…

cond-mat.mes-hall2009★ 21 cited

A Nanoscale Experiment Measuring Gravity's Role in Breaking the Unitarity of Quantum Dynamics

Jasper van Wezel, Tjerk H. Oosterkamp

Modern, state of the art nanomechanical devices are capable of creating spatial superpositions that are massive enough to begin to experimentally access the quantum to classical cr…

cond-mat.mes-hall2009★ 19 cited

Quantum manipulation in a Josephson LED

Fabian Hassler, Yuli V. Nazarov, Leo P. Kouwenhoven

We access the suitability of the recently proposed Josephson LED for quantum manipulation purposes. We show that the device can both be used for on-demand production of entangled p…

cond-mat.mes-hall2009★ 39 cited

Charge transport in a single superconducting tin nanowire encapsulated in a multiwalled carbon nanotube

Nikolaos Tombros, Luuk Buit, Imad Arfaoui +6

The charge transport properties of single superconducting tin nanowires, encapsulated by multiwalled carbon nanotubes have been investigated by multi-probe measurements. The multiw…

cond-mat.mes-hall2009★ 23 cited

Hartman effect and spin precession in graphene

R. A. Sepkhanov, M. V. Medvedyeva, C. W. J. Beenakker

Spin precession has been used to measure the transmission time τover a distance L in a graphene sheet. Since conduction electrons in graphene have an energy-independent velocity v,…

cond-mat.mes-hall2009★ 2 cited

Pseudodiffusive transmission of nodal Dirac fermions through a clean d-wave superconductor

J. K. Asboth, A. R. Akhmerov, A. C. Berceanu +1

We calculate the transmission of electrons and holes between two normal-metal electrodes (N), separated over a distance L by an impurity-free superconductor (S) with d-wave symmetr…

cond-mat.mes-hall2009★ 56 cited

Parallel Transport of Electrons in Graphene Parallels Gravity

Andrej Mesaros, Darius Sadri, Jan Zaanen

Geometrically a crystal containing dislocations and disclinations can be envisaged as a `fixed frame' Cartan--Einstein space-time carrying torsion and curvature, respectively. We d…

cond-mat.mes-hall2009★ 5 cited

Magneto-orientation and quantum size effect in SP-STM conductance in the presence of a subsurface magnetic cluster

Ye. S. Avotina, Yu. A. Kolesnichenko, J. M. van Ruitenbeek

The influence of a single magnetic cluster in a non-magnetic host metal on the spin current and the charge current in the vicinity of a ferromagneti…

cond-mat.mes-hall2009★ 475 cited

Theory of the topological Anderson insulator

C. W. Groth, M. Wimmer, A. R. Akhmerov +2

We present an effective medium theory that explains the disorder-induced transition into a phase of quantized conductance, discovered in computer simulations of HgTe quantum wells.…

cond-mat.mes-hall2009★ 38 cited

Observation of the Kohn anomaly near the K point of bilayer graphene

D. L. Mafra, L. M. Malard, S. K. Doorn +4

The dispersion of electrons and phonons near the K point of bilayer graphene was investigated in a resonant Raman study using different laser excitation energies in the near infrar…

cond-mat.mes-hall2009★ 7 cited

Metallic properties of magnesium point contacts

R. H. M. Smit, A. I. Mares, M. Haefner +3

We present an experimental and theoretical study of the conductance and stability of Mg atomic-sized contacts. Using Mechanically Controllable Break Junctions (MCBJ), we have obser…

cond-mat.mes-hall2009★ 27 cited

Bistable hysteresis and resistance switching in hydrogen gold junctions

M. L. Trouwborst, E. H. Huisman, S. J. van der Molen +1

Current-voltage characteristics of H2-Au molecular junctions exhibit intriguing steps around a characteristic voltage of 40 mV. Surprisingly, we find that a hysteresis is connected…

cond-mat.mes-hall2009★ 18 cited

Switching of electrical current by spin precession in the first Landau level of an inverted-gap semiconductor

A. R. Akhmerov, C. W. Groth, J. Tworzydlo +1

We show how the quantum Hall effect in an inverted-gap semiconductor (with electron- and hole-like states at the conduction- and valence-band edges interchanged) can be used to inj…

cond-mat.mes-hall2009

Qubit decoherence due to detector switching

I. Serban, F. K. Wilhelm

We provide insight into the qubit measurement process involving a switching type of detector. We study the switching-induced decoherence during escape events. We present a simple m…

cond-mat.mes-hall2009★ 623 cited

Electrically detected interferometry of Majorana fermions in a topological insulator

A. R. Akhmerov, Johan Nilsson, C. W. J. Beenakker

We show how a chiral Dirac fermion (a massless electron or hole) can be converted into a pair of neutral chiral Majorana fermions (a particle equal to its own antiparticle). These…

cond-mat.mes-hall2009★ 36 cited

Dephasing-enabled triplet Andreev conductance

B. Béri

We study the conductance of normal-superconducting quantum dots with strong spin-orbit scattering, coupled to a source reservoir using a single-mode spin-filtering quantum point co…

cond-mat.mes-hall2009★ 51 cited

The Josephson light-emitting diode

Patrik Recher, Yuli V. Nazarov, Leo P. Kouwenhoven

We consider an optical quantum dot where an electron level and a hole level are coupled to respective superconducting leads. We find that electrons and holes recombine producing ph…

cond-mat.mes-hall2009★ 13 cited

Generalization of the Poisson kernel to the superconducting random-matrix ensembles

B. Béri

We calculate the distribution of the scattering matrix at the Fermi level for chaotic normal-superconducting systems for the case of arbitrary coupling of the scattering region to…

cond-mat.mes-hall2009★ 260 cited

Quantum Goos-Hanchen effect in graphene

C. W. J. Beenakker, R. A. Sepkhanov, A. R. Akhmerov +1

The Goos-Hanchen (GH) effect is an interference effect on total internal reflection at an interface, resulting in a shift sigma of the reflected beam along the interface. We show t…