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Hydrocarbon tribopolymer, a type of polymer formed due to friction between surfaces, is a major impediment to the development of micro- and nanoelectromechanical systems (MEMS/NEMS) devices for industrial application. Tribopolymer buildup…

材料科学 · 物理学 2016-12-12 Hyeong-Seok D. Kim , Jing Yang , Yubo Qi , Andrew M. Rappe

A nonlinear model representing the tribological problem of a thin solid lubricant layer between two sliding periodic surfaces is used to analyze the phenomenon of hysteresis at pinning/depinning around a moving state rather than around a…

材料科学 · 物理学 2009-11-13 N. Manini , G. E. Santoro , E. Tosatti , A. Vanossi

In this paper, starting from a non-convex and nonlocal $3D-$variational model for the electric polarization in a ferroelectric material, and using an asymptotic process based on dimensional reduction, we analyze junction phenomena for two…

偏微分方程分析 · 数学 2023-11-02 Luisa Faella , Pedro Hernández-Llanos , Ravi Prakash

It is far well accepted that the morphology of nanoparticles and nanoalloys is of paramount importance to understand their properties. Furthemore, the morphology depends on the growth mechanism with coalescence generally accepted as one the…

介观与纳米尺度物理 · 物理学 2023-07-27 Sofia Zinzani , Francesca Baletto

Previously we numerically showed that thermalization can occur in an oscillating Bose-Einstein condensate (BEC) with a disordered harmonic trap when healing length $\xi$ of the condensate is shorter than the correlation length $\sigma_{D}$…

量子气体 · 物理学 2018-07-31 Che-Hsiu Hsueh , Makoto Tsubota , Wen-Chin Wu

We investigate the orientation dependence of Enhanced Ionization (EI) during strong-field-driven nuclear motion in acetylene (C$_2$H$_2$). Here, we both initiate and probe molecular dynamics in acetylene with intense 6-fs cross-polarized…

原子物理 · 物理学 2024-11-08 S. A. Mohideen , A. J. Howard , C. Cheng , I. Gabalski , A. M. Ghrist , E. Weckwerth , P. H. Bucksbaum

Non-adiabatic effects play an important role in many chemical processes. In order to study the underlying non-adiabatic potential-energy surfaces (PESs), we present a locally-constrained density-functional theory approach, which enables us…

材料科学 · 物理学 2015-06-25 Joerg Behler , Bernard Delley , Karsten Reuter , Matthias Scheffler

We consider dynamically generated spin squeezing in interacting bimodal condensates. We show that particle losses and non-zero temperature effects in a multimode theory completely change the scaling of the best squeezing for large atom…

量子气体 · 物理学 2012-09-10 Alice Sinatra , Jean-Christophe Dornstetter , Yvan Castin

Large aromatic carbon nanostructures are cornerstone materials due to their increasingly active role in functional devices, but their synthesis in solution encounters size and shape limitations. New on-surface strategies facilitate the…

We investigate the spin- and energy dependent tunneling through a single organic molecule (CoPc) adsorbed on a ferromagnetic Fe thin film, spatially resolved by low-temperature spin-polarized scanning tunneling microscopy. Interestingly,…

We numerically solve the non-linear Poisson-Boltzmann equation for two cylinders confined by two parallel charged plates. The repulsive electrical double layer component of the cylinder pair potential is substantially reduced by confinement…

软凝聚态物质 · 物理学 2009-10-31 Mark Ospeck , Seth Fraden

Chemically driven fluids can demix to form condensed droplets that exhibit phase behaviors not observed at equilibrium. In particular, nonequilibrium interfacial properties can emerge when the chemical reactions are driven differentially…

软凝聚态物质 · 物理学 2023-11-20 Yongick Cho , William M. Jacobs

Coarsening dynamics, the canonical theory of phase ordering following a quench across a symmetry breaking phase transition, is thought to be driven by the annihilation of topological defects. Here we show that this understanding is…

量子气体 · 物理学 2019-09-11 L. A. Williamson , P. B. Blakie

The behavior as a function of temperature of very thin films (10 to 200 nm) of pentylcyanobiphenyl (5CB) on silicon substrates is reported. In the vicinity of the nematic/isotropic transition we observe a coexistence of two regions of…

软凝聚态物质 · 物理学 2009-11-07 D. van Effenterre , R. Ober , M. P. Valignat , A. M. Cazabat

Strong electron-electron interaction in ultraflat edge states can be responsible for correlated phases of matter, such as magnetism, charge density wave or superconductivity. Here we consider the diamond(111) surface that, after Pandey…

材料科学 · 物理学 2019-03-25 Betül Pamuk , Matteo Calandra

In this paper we prove the existence and uniqueness of the solution of a non-stationary problem that modelizes the behaviour of the concentrations and the temperature of gases going through a cylindrical passage of an automotive catalytic…

偏微分方程分析 · 数学 2007-05-23 J. -D. Hoernel

The frontier orbital sequence of individual dicyanovinyl-substituted oligothiophene molecules is studied by means of scanning tunneling microscopy. On NaCl/Cu(111) the molecules are neutral and the two lowest unoccupied molecular states are…

介观与纳米尺度物理 · 物理学 2017-08-09 Ping Yu , Nemanja Kocić , Benjamin Siegert , Andrea Donarini , Jascha Repp

We present a thorough analysis of the foundations of models of stabilization of negative capacitance (NC) in a ferroelectric (FE) layer by capacitance matching to a dielectric layer, which claim that the FE is stabilized in a low…

介观与纳米尺度物理 · 物理学 2020-03-03 J. A. Kittl , J. -P. Locquet , M. Houssa , V. V. Afanasiev

We consider fermionic polar molecules in a bilayer geometry where they are oriented perpendicularly to the layers, which permits both low inelastic losses and superfluid pairing. The dipole-dipole interaction between molecules of different…

量子气体 · 物理学 2010-11-29 A. Pikovski , M. Klawunn , G. V. Shlyapnikov , L. Santos

This paper presents an experimental and modeling study of the oxidation of large linear akanes (from C10) representative from diesel fuel from low to intermediate temperature (550-1100 K) including the negative temperature coefficient (NTC)…