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The study focuses on propagation of longitudinal waves in an elastic pipe partly embedded in a medium with dry friction. Mathematical formulation of the problem on the impact pipe driving into the soil is based on the model of longitudinal…

偏微分方程分析 · 数学 2013-12-06 Nadezhda Aleksandrova

We study experimentally the flow of a liquid metal confined between differentially rotating cylinders, in the presence of externally imposed axial and azimuthal magnetic fields. For increasingly large azimuthal fields a wave-like…

The static polarizability of cylindrical systems is shown to have a strong dependence on a uniform magnetic field applied parallel to the tube axis. This dependence is demonstrated by performing exact numerical diagonalizations of simple…

凝聚态物理 · 物理学 2009-11-07 S. Pleutin , A. A. Ovchinnikov

Collective ferromagnetic motion in a conducting medium is damped by the transfer of the magnetic moment and energy to the itinerant carriers. We present a calculation of the corresponding magnetization relaxation as a linear-response…

介观与纳米尺度物理 · 物理学 2009-11-10 Yaroslav Tserkovnyak , Gregory A. Fiete , Bertrand I. Halperin

We address the electronic resonant transport in presence of a transverse magnetic field through the single level of a suspended carbon nanotube acting as a quantum oscillator. We predict a negative magneto-conductance with a magnetic-field…

介观与纳米尺度物理 · 物理学 2010-06-17 G. Rastelli , M. Houzet , F. Pistolesi

We propose and demonstrate an experimental implementation for the observation of magnetic fields from spatial features of absorption profiles in a warm atomic vapor. A radially polarized vector beam that traverses an atomic vapor will…

Recent experiments on amorphous materials have established the existence of surface states similar to those of crystalline three-dimensional topological insulators (TIs). Amorphous topological insulators are also independently of interest…

介观与纳米尺度物理 · 物理学 2024-11-18 Siddhant Mal , Elizabeth J. Dresselhaus , Joel E. Moore

We calculate the conductance variation of several metallic carbon nanotubes as their end is being dipped into a liquid metal electrode, where experiments have shown an achievable conductance close to 1 quantum of conductance. The calculated…

凝聚态物理 · 物理学 2009-11-07 N. Mingo , Jie Han

We present a new model, and the validating experiments, that unveil the rich physics behind the flight of a conductive ring in the Thomson experiment, a physics veiled by the fast thrust that impels the ring. We uncover interesting features…

物理教育 · 物理学 2015-06-19 Celso L. Ladera , Guillermo Donoso

We propose a review of the current knowledge about the synthesis, magnetic properties and applications of magnetic cylindrical nanowires and nanotubes. By "nano" we consider diameters reasonably smaller than a micrometer. At this scale,…

介观与纳米尺度物理 · 物理学 2018-12-19 Michal Stano , Olivier Fruchart

We analytically and numerically study the nonreciprocal surface waves guided by a magnetized metasurface tube. When applying the magnetic bias perpendicularly to the cylinder axis, the conductivity profile cross-section is nonuniform, which…

光学 · 物理学 2024-04-01 Yarden Mazor

Under analysis is travel of P-waves in an elastic pipe partly embedded in soil with dry friction. The mathematical formulation of the problem on impact pipe driving in soil is based on the model of axial vibration of an elastic bar,…

偏微分方程分析 · 数学 2013-12-06 Nadezhda Aleksandrova

We study the transport properties in nodal line semimetals with short-ranged impurity potentials at zero temperature. By computing the Drude conductivity and the corrections from the interference of particle and hole trajectories, we find…

介观与纳米尺度物理 · 物理学 2019-08-26 Hui Yang , Fa Wang

The magnetoconductance of p-n junctions formed in clean single wall carbon nanotubes is studied in the noninteracting electron approximation and perturbatively in electron-electron interaction, in the geometry where a magnetic field is…

介观与纳米尺度物理 · 物理学 2009-11-13 A. V. Andreev

We calculate the conductance of tubular-shaped nanowires having many potential scatterers at random positions. Our approach is based on the scattering matrix formalism and our results analyzed within the scaling theory of disordered…

其他凝聚态物理 · 物理学 2010-01-12 Llorens Serra , Mahn-Soo Choi

In Co-nanotubes with a curling magnetization, the orbital motion of the conduction electrons interacts with their spin. We predict that the (absolute) value of the magnetic energy of the spin is strongly reduced. The new precession axis for…

介观与纳米尺度物理 · 物理学 2015-03-16 G. Bergmann , R. S. Thompson , J. G. Lu

We examine a nonlinear magnetoinductive dimer and compute its linear and nonlinear symmetric, antisymmetric and asymmetric modes in closed-form, in the rotating-wave approximation. A linear stability analysis of these modes reveals that the…

可精确求解与可积系统 · 物理学 2015-06-12 Mario I. Molina

The non-equilibrium properties of a driven quasi-one dimensional superconducting ring subjected to a constant electromotive force ({\it emf}) is studied. The {\it emf} accelerates the superconducting electrons until the critical current is…

超导电性 · 物理学 2009-11-07 Mikko Karttunen , K. R. Elder , Martin B. Tarlie , Martin Grant

We propose a novel method for guiding cold, neutral atoms using static magnetic fields. A theoretical study of the magnetic field produced by a tube consisting of two identical, interwound solenoids carrying equal but opposite currents is…

原子物理 · 物理学 2007-05-23 J. A. Richmond , S. Nic Chormaic , B. P. Cantwell , G. I. Opat

We study stationary electron flow through a three-terminal quantum ring and describe effects due to deflection of electron trajectories by classical magnetic forces. We demonstrate that generally at high magnetic field ($B$) the current is…

介观与纳米尺度物理 · 物理学 2010-05-10 M. R. Poniedzialek , B. Szafran