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Robust porous silicon substrates were employed for generating interconnected networks of superconducting ultrathin Nb nanowires. Scanning electron microscopy analysis was performed to investigate the morphology of the samples, which…

Silicon nanowires have attracted considerable interest due to their wide-ranging applications in nanoelectromechanical systems and nanoelectronics. Molecular dynamics simulations are powerful tools for studying the mechanical properties of…

材料科学 · 物理学 2023-08-25 Sina Zare Pakzad , Mohammad Nasr Esfahani , B. Erdem Alaca

We measure quantum and thermal phase-slip rates using the standard deviation of the switching current in superconducting nanowires at high bias current. Our rigorous quantitative analysis provides firm evidence for the presence of quantum…

超导电性 · 物理学 2015-06-04 T. Aref , A. Levchenko , V. Vakaryuk , A. Bezryadin

An experimental study of the dynamics and droplet production in three mechanically generated plunging breaking waves is presented in this two-part paper. In the present paper (Part 1), the dynamics of the three breakers are studied through…

流体动力学 · 物理学 2023-08-09 Martin A. Erinin , Xinan Liu , Sophie D. Wang , James H. Duncan

We investigate the histograms of conductance values obtained during controlled electromigration thinning of Cu thin films. We focus on the question whether the most frequently observed conductance values, apparent as peaks in conductance…

介观与纳米尺度物理 · 物理学 2017-09-22 Robert Pfender-Siedle , Julia Hauser , Regina Hoffmann-Vogel

Core-shell nanowires made of Si and Ge can be grown experimentally with excellent control for different sizes of both core and shell. We have studied the structural properties of Si/Ge and Ge/Si core-shell nanowires aligned along the…

We study the diffusion of a linear polymer in the presence of permeable membranes without excluded volume interactions, using scaling theory and Monte Carlo simulations. We find that the average time it takes for a chain with polymerization…

凝聚态物理 · 物理学 2016-08-31 Hyoungsoo Yoon , J. M. Deutsch

Structural transformations, electronic spectra and ballistic transport in pulled gold nanowires are investigated with ab initio simulations, and correlated with recent measurements. Strain-induced yield of an initial double-strand wire…

材料科学 · 物理学 2007-05-23 H. Hakkinen , R. N. Barnett , A. G. Scherbakov , U. Landman

Nanowires have been considered for a number of applications in nanometrology. In such a context, we have explored the possibility of using ultrathin twisted nanowires as torsion nanobalances to probe forces and torques at molecular level…

介观与纳米尺度物理 · 物理学 2014-11-05 Joelson Cott-Garcia , Joao F. Justo

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

We demonstrate a theoretical analysis concerning the geometrical structures and electrical conduction of infinite monatomic gold and aluminum wires in the process of their elongation, based on first-principles molecular-dynamics simulations…

凝聚态物理 · 物理学 2009-11-07 Tomoya Ono , Hideki Yamasaki , Yoshiyuki Egami , Kikuji Hirose

Nickel/Bismuth (Ni/Bi) bilayers have recently attracted attention due to the occurrence of time-reversal symmetry breaking in the superconducting state. Here, we report on the structural, magnetic and electric characterization of thin film…

We study the high-velocity regime mode-I fracture instability when small microbranches start to appear near the main crack, using large scale simulations. Some of the features of those microbranches have been reproduced qualitatively in…

统计力学 · 物理学 2015-07-13 Shay I. Heizler , David A. Kessler

Using computer simulations, we have studied the percolation and the electrical conductance of two-dimensional, random percolating networks of curved, zero-width metallic nanowires. We mimicked the curved nanowires using circular arcs. The…

统计力学 · 物理学 2023-05-01 Yuri Yu. Tarasevich , Andrei V. Eserkepov , Irina V. Vodolazskaya

Using variable temperature scanning tunneling microscopy and dI/dz barrier height spectroscopy, the structure of water on h-BN/Rh(111) nanomesh has been investigated. Below its desorption temperature, two distinct phases of water…

The temperature dependence of structural properties for infinitely long gold nanowires is studied. The molecular dynamics simulation method and the embedded-atom potential are used. The wires constructed at T=0 K with a face-centered cubic…

材料科学 · 物理学 2009-10-31 G. Bilalbegovic

We use the phase-field method to study the martensitic transformation at the nanoscale. For nanosystems such as nanowires and nanograins embedded in a stiff matrix, the geometric constraints and boundary conditions have an impact on…

材料科学 · 物理学 2008-07-23 Mathieu Bouville , Rajeev Ahluwalia

Using a phase-field model which incorporates enhanced diffusion at the nanowire surfaces, we study the effect of different parameters on the stability of intersecting nanowires. Our study shows that at the intersection of nanowires,…

材料科学 · 物理学 2021-12-01 Abhinav Roy , Arjun Varma R , M P Gururajan

We theoretically and experimentally examine the effect of forcing and damping on systems that can be described by the nonlinear Schr\"odinger equation (NLSE), by making use of the phase-space predictions of the three-wave truncation of the…

斑图形成与孤子 · 物理学 2020-05-11 D. Eeltink , A. Armaroli , C. Luneau , M. Brunetti , H. Branger , J. Kasparian

In Hot or Warm Dark Matter universes the density fluctuations at early times contain very little power below a characteristic wavelength related inversely to the particle mass. We study how discreteness noise influences the growth of…

天体物理学 · 物理学 2007-08-23 Jie Wang , Simon D. M. White