The Experts below are selected from a list of 10011 Experts worldwide ranked by ideXlab platform

Cosimo Gorini - One of the best experts on this subject based on the ideXlab platform.

  • magnetoconductance quantum hall effect and coulomb blockade in topological insulator nanocones
    Physical Review Letters, 2020
    Co-Authors: Raphael Kozlovsky, Ansgar Graf, Denis Kochan, Klaus Richter, Cosimo Gorini
    Abstract:

    Magnetotransport through cylindrical topological insulator (TI) nanowires is governed by the interplay between quantum confinement and geometric (Aharonov-Bohm and Berry) phases. Here, we argue that the much broader class of TI nanowires with varying radius -- for which a homogeneous coaxial magnetic field induces a varying Aharonov-Bohm flux that gives rise to a non-trivial mass-like potential along the wire -- is accessible by studying its simplest member, a TI nanocone. Such nanocones allow to observe intriguing mesoscopic transport phenomena: While the conductance in a perpendicular magnetic field is quantized due to higher-order topological hinge states, it shows resonant transmission through Dirac Landau levels in a coaxial magnetic field. Furthermore, it may act as a quantum magnetic bottle, Confining Surface Dirac electrons and leading to Coulomb blockade. We show numerically that the above-mentioned effects occur for experimentally accessible values of system size and magnetic field, suggesting that TI nanocone junctions may serve as building blocks for Dirac electron optics setups.

Raphael Kozlovsky - One of the best experts on this subject based on the ideXlab platform.

  • magnetoconductance quantum hall effect and coulomb blockade in topological insulator nanocones
    Physical Review Letters, 2020
    Co-Authors: Raphael Kozlovsky, Ansgar Graf, Denis Kochan, Klaus Richter, Cosimo Gorini
    Abstract:

    Magnetotransport through cylindrical topological insulator (TI) nanowires is governed by the interplay between quantum confinement and geometric (Aharonov-Bohm and Berry) phases. Here, we argue that the much broader class of TI nanowires with varying radius -- for which a homogeneous coaxial magnetic field induces a varying Aharonov-Bohm flux that gives rise to a non-trivial mass-like potential along the wire -- is accessible by studying its simplest member, a TI nanocone. Such nanocones allow to observe intriguing mesoscopic transport phenomena: While the conductance in a perpendicular magnetic field is quantized due to higher-order topological hinge states, it shows resonant transmission through Dirac Landau levels in a coaxial magnetic field. Furthermore, it may act as a quantum magnetic bottle, Confining Surface Dirac electrons and leading to Coulomb blockade. We show numerically that the above-mentioned effects occur for experimentally accessible values of system size and magnetic field, suggesting that TI nanocone junctions may serve as building blocks for Dirac electron optics setups.

Marcia C. Barbosa - One of the best experts on this subject based on the ideXlab platform.

  • Relation between boundary slip mechanisms and waterlike fluid behavior.
    Physical Review E, 2018
    Co-Authors: Patricia Ternes, Evy Salcedo, Marcia C. Barbosa
    Abstract:

    The slip of a fluid layer in contact with a solid Confining Surface is investigated for different temperatures and densities using molecular dynamic simulations. We show that for an anomalous waterlike fluid the slip goes as follows: for low levels of shear, defect slip appears and is related to the particle exchange between the fluid layers; at high levels of shear, global slip occurs and is related to the homogeneous distribution of the fluid in the Confining Surfaces. The oscillations in the transition velocity from defect to global slip are shown to be associated with changes in the layering distribution in the anomalous fluid.

  • Relation between boundary slip mechanisms and water-like fluid behavior
    arXiv: Soft Condensed Matter, 2018
    Co-Authors: Patricia Ternes, Evy Salcedo, Marcia C. Barbosa
    Abstract:

    The slip of a fluid layer in contact with a solid Confining Surface is investigated for different temperatures and densities using molecular dynamic simulations. We show that for an anomalous water-like fluid the slip goes as follows. For low levels of shear, the defect slip appears and it is related with the particle exchange between the fluid layers. At high levels of shear, the global slip occurs and it is related to the homogeneous distribution of the fluid in the Confining Surfaces. The oscillations in the transition velocity from the defect to the global slip is shown to be associated with changes in the layering distribution in the anomalous fluid.

Klaus Richter - One of the best experts on this subject based on the ideXlab platform.

  • magnetoconductance quantum hall effect and coulomb blockade in topological insulator nanocones
    Physical Review Letters, 2020
    Co-Authors: Raphael Kozlovsky, Ansgar Graf, Denis Kochan, Klaus Richter, Cosimo Gorini
    Abstract:

    Magnetotransport through cylindrical topological insulator (TI) nanowires is governed by the interplay between quantum confinement and geometric (Aharonov-Bohm and Berry) phases. Here, we argue that the much broader class of TI nanowires with varying radius -- for which a homogeneous coaxial magnetic field induces a varying Aharonov-Bohm flux that gives rise to a non-trivial mass-like potential along the wire -- is accessible by studying its simplest member, a TI nanocone. Such nanocones allow to observe intriguing mesoscopic transport phenomena: While the conductance in a perpendicular magnetic field is quantized due to higher-order topological hinge states, it shows resonant transmission through Dirac Landau levels in a coaxial magnetic field. Furthermore, it may act as a quantum magnetic bottle, Confining Surface Dirac electrons and leading to Coulomb blockade. We show numerically that the above-mentioned effects occur for experimentally accessible values of system size and magnetic field, suggesting that TI nanocone junctions may serve as building blocks for Dirac electron optics setups.

Ansgar Graf - One of the best experts on this subject based on the ideXlab platform.

  • magnetoconductance quantum hall effect and coulomb blockade in topological insulator nanocones
    Physical Review Letters, 2020
    Co-Authors: Raphael Kozlovsky, Ansgar Graf, Denis Kochan, Klaus Richter, Cosimo Gorini
    Abstract:

    Magnetotransport through cylindrical topological insulator (TI) nanowires is governed by the interplay between quantum confinement and geometric (Aharonov-Bohm and Berry) phases. Here, we argue that the much broader class of TI nanowires with varying radius -- for which a homogeneous coaxial magnetic field induces a varying Aharonov-Bohm flux that gives rise to a non-trivial mass-like potential along the wire -- is accessible by studying its simplest member, a TI nanocone. Such nanocones allow to observe intriguing mesoscopic transport phenomena: While the conductance in a perpendicular magnetic field is quantized due to higher-order topological hinge states, it shows resonant transmission through Dirac Landau levels in a coaxial magnetic field. Furthermore, it may act as a quantum magnetic bottle, Confining Surface Dirac electrons and leading to Coulomb blockade. We show numerically that the above-mentioned effects occur for experimentally accessible values of system size and magnetic field, suggesting that TI nanocone junctions may serve as building blocks for Dirac electron optics setups.