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We demonstrate that nascent polymer crystals (i.e., nuclei) are anisotropic entities, with neither spherical nor cylindrical geometry, in contrast to previous assumptions. In fact, cylindrical, spherical, and other high symmetry geometries…

软凝聚态物质 · 物理学 2020-01-08 Kyle Wm. Hall , Timothy W. Sirk , Simona Percec , Michael L. Klein , Wataru Shinoda

We investigate the formation of cluster crystals with multiply occupied lattice sites on a spherical surface in systems of ultra-soft particles interacting via repulsive, bounded pair potentials. Not all interactions of this kind lead to…

软凝聚态物质 · 物理学 2018-07-31 Stefano Franzini , Luciano Reatto , Davide Pini

We report a numerical study of the rate of crystal nucleation in a binary suspension of oppositely charged colloids. Two different crystal structures compete in the thermodynamic conditions under study. We find that the crystal phase that…

软凝聚态物质 · 物理学 2011-11-10 Eduardo Sanz , Chantal Valeriani , Daan Frenkel , Marjolein Dijkstra

A kinetic theory of homogeneous crystal nucleation in unary droplets is presented taking into account that a crystal nucleus can form not only in the volume-based mode (with all its facets within the droplet) but also in the…

材料科学 · 物理学 2016-09-28 Yuri S. Djikaev

We study the phase diagram of a two-dimensional assembly of bosons interacting via a soft core repulsive pair potential of varying strength, and compare it to that of the equivalent system in which particles are regarded as distinguishable.…

量子气体 · 物理学 2015-06-18 Fabio Cinti , Massimo Boninsegni , Thomas Pohl

Monte Carlo simulation on the crystallization of double crystalline diblock copolymer unravels an intrinsic relationship between block asymmetry and crystallization behaviour. We model crystalline A-B diblock copolymer, wherein the melting…

软凝聚态物质 · 物理学 2015-06-19 Chitrita Kundu , Ashok Kumar Dasmahapatra

The physical and chemical properties of metal nanoparticles differ significantly from those of free metal atoms as well as from the properties of bulk metals, and therefore, they may be viewed as a transition regime between the two physical…

适应与自组织系统 · 物理学 2007-05-23 Horacio G. Rotstein , Amy Novick-Cohen , Rina Tannenbaum

We present a sufficient criterion for the emergence of cluster phases in an ensemble of interacting classical particles with repulsive two-body interactions. Through a zero-temperature analysis in the low density region we determine the…

软凝聚态物质 · 物理学 2025-02-25 Alejandro Mendoza-Coto , Rómulo Cenci , Guido Pupillo , Rogelio Díaz-Méndez , Egor Babaev

The formation of alpha-clusters in nuclei close to the decay thresholds is discussed. These states can be considered to be boson-condensates, which are formed in a second order phase transition in a mixture of nucleons and alpha-particles.…

核实验 · 物理学 2015-05-18 Wolfram von Oertzen

We examine the favoured cluster structures for two new potentials, which both behave as monatomic model glass-formers in bulk. We find that the oscillations in the interatomic potential lead to global minima that are non-compact…

凝聚态物理 · 物理学 2007-05-23 Jonathan P. K. Doye , David J. Wales , Fredrik H. M. Zetterling , Mikhail Dzugutov

We systematically study the relationship between equilibrium and non-equilibrium phase diagrams of a system of short-ranged attractive colloids. Using Monte Carlo and Brownian dynamics simulations we find a window of enhanced…

软凝聚态物质 · 物理学 2009-11-13 Andrea Fortini , Eduardo Sanz , Marjolein Dijkstra

The nucleation of a droplet of stable cylinder phase from a metastable lamellar phase is examined within the single-mode approximation to the Brazovskii model for diblock copolymer melts. By employing a variational ansatz for the droplet…

软凝聚态物质 · 物理学 2009-11-10 Robert A. Wickham , An-Chang Shi , Zhen-Gang Wang

The formation mechanism of ice banding in the system of freezing colloidal suspensions, which is of significance in frost heaving, ice-templating porous materials and biological materials, still remains a mystery. Recently, the theory of…

材料科学 · 物理学 2016-12-21 Jiaxue You , Jincheng Wang , Lilin Wang , Zhijun Wang , Junjie Li , Xin Lin

The question whether or not the presence of warm hydrometeors in clouds may play a significant role in the nucleation of new ice particles has been debated for several decades. While the early works of Fukuta and Lee (1986) and Baker (1991)…

大气与海洋物理 · 物理学 2021-02-03 Michael Krayer , Agathe Chouippe , Markus Uhlmann , Jan Dušek , Thomas Leisner

Polymer blends offer an exciting material for various potential applications due to their tunable properties by varying constituting components and their relative composition. Our simulation results unravel an intrinsic relationship between…

软凝聚态物质 · 物理学 2016-10-13 Ashok Kumar Dasmahapatra

The basic physics of nucleation in solid \hl{single-crystal} nanoparticles is revealed by a phase-field theory that includes surface energy, chemical reactions and coherency strain. In contrast to binary fluids, which form arbitrary contact…

材料科学 · 物理学 2014-09-17 Daniel A. Cogswell , Martin Z. Bazant

We study the nucleation of crystalline cluster phases in the generalized exponential model with exponent n=4. Due to the finite value of this pair potential for zero separation, at high densities the system forms cluster crystals with…

软凝聚态物质 · 物理学 2016-09-01 Christian Leitold , Christoph Dellago

We argue that, due to the specific form of the interaction potential between electronic guiding centers, a bubble crystal (BC) with basis may be energetically more favorable than the usual bubble solid. This new BC has well-defined normal…

介观与纳米尺度物理 · 物理学 2009-11-10 A. M. Ettouhami , F. D. Klironomos , A. T. Dorsey

We prove two equilibrium properties of a system of interacting atoms in three or higher dimensional continuous space. (i) If the particles interact via pair potentials of a nonnegative Fourier transform, their self-organization into…

数学物理 · 物理学 2023-05-31 Andras Suto

Simple generic aspects of nuclear pairing in homogeneous medium as well as in finite nuclei are discussed. It is argued that low-energy nuclear structure is not sensitive enough to resolve fine details of nuclear nucleon-nucleon (NN)…

核理论 · 物理学 2009-11-11 Wojciech Satula
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