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Our density functional theory calculations for Fe_{13-n}M_{n} for M = Sc, Ti, V, Cr, Mn, Co, Ni, and Cu up to n = 4 show that the icosahedral symmetry of Fe13, albeit minor changes in bond lengths, is robust despite doping and is retained…

材料科学 · 物理学 2014-08-04 Anteneh G. Tefera , Mogus D. Mochena

We investigate the properties of clusters formed from two connected $\mathrm{Ge_{m}}$ cage-like clusters, such as experimentally synthesized $\mathrm{Au_3Ge_{18}^{5-}}$, using first-principles DFT methods. We focus particularly on…

介观与纳米尺度物理 · 物理学 2015-03-06 Danielle McDermott , Kathie E. Newman

We present results of a study of small stoichiometric $Cd_{n}Te_{n}$ ($1{\leq}n{\leq}6$) clusters and few medium sized non-stoichiometric $Cd_{m}Te_{n}$ [($m,n= 13, 16, 19$); ($m{\neq}n$)] clusters using the Density Functional formalism and…

材料科学 · 物理学 2013-05-29 Somesh Kr. Bhattacharya , Anjali Kshirsagar

The metal content of clusters of galaxies and its relation to their stellar content is revisited making use of a cluster sample for which all four basic parameters are homogeneously measured within consistent radii, namely core-excised…

星系天体物理 · 物理学 2015-06-22 A. Renzini , S. Andreon

We report an unusual evolution of structure and magnetism in stoichiometric MnO clusters based on an extensive and unbiased search through the potential energy surface within density functional theory. The smaller clusters, containing up to…

介观与纳米尺度物理 · 物理学 2011-11-11 Shreemoyee Ganguly , Mukul Kabir , Biplab Sanyal , Abhijit Mookerjee

We obtain an effective parametrization of the bulk electronic structure of InP within the Tight Binding scheme. Using these parameters, we calculate the electronic structure of InP clusters with the size ranging upto 7.5 nm. The calculated…

材料科学 · 物理学 2009-11-10 Sameer Sapra , Ranjani Viswanatha , D. D. Sarma

We report on the structure and adsorption properties of Pd$_n$ ($n=1-4$) clusters supported on the rutile TiO$_2$ (110) surfaces with the possible presence of a surface oxygen vacancy or a subsurface Ti-interstitial atom. As predicted by…

材料科学 · 物理学 2012-04-12 Jin Zhang , Anastassia N. Alexandrova

Zinc and cadmium clusters interacting with a Gupta potential have previously been identified as prototypical metallic systems that exhibiting disordered cluster structures. Here, putative global minima of the potential energy have been…

凝聚态物理 · 物理学 2007-05-23 Jonathan P. K. Doye

The electronic structures of a variety of experimentally identified gold and silver nanoclusters from 20 to 246 atoms, either unprotected or protected by several types of ligands, are characterized by using point group specific symmetry…

原子与分子团簇 · 物理学 2018-11-21 Sami Kaappa , Sami Malola , Hannu Häkkinen

We present a comprehensive study of the structure, formation, and dynamics of a one-component model system that self-assembles into an icosahedral quasicrystal (IQC). Using molecular dynamics simulations combined with unsupervised machine…

软凝聚态物质 · 物理学 2025-07-22 Edwin A. Bedolla-Montiel , Susana Marín-Aguilar , Marjolein Dijkstra

We study the formation of a colloidal gel by means of Molecular Dynamics simulations of a model for colloidal suspensions. A slowing down with gel-like features is observed at low temperatures and low volume fractions, due to the formation…

软凝聚态物质 · 物理学 2009-11-13 A. Fierro , E. Del Gado , A. de Candia , A. Coniglio

We propose a model of mass-conserving heterogeneous nucleation to describe the dynamics of ligand-receptor binding in closed cellular compartments. When the ligand dissociation rate is small, competition among receptors for free ligands…

软凝聚态物质 · 物理学 2015-05-30 T. Chou , M. D'Orsogna

We study the spontaneous crystallization of an assembly of highly monodisperse steel spheres under shaking, as it evolves from localized icosahedral ordering towards a packing reaching crystalline ordering. Towards this end, real space…

软凝聚态物质 · 物理学 2018-12-06 Indu Dhiman , Simon A. J. Kimber , Anita Mehta , Tapan Chatterji

We report equilibrium geometric structures of CuO2, CuO3, CuO6, and CuO clusters obtained by an all-electron linear combination of atomic orbitals scheme within the density-functional theory with generalized gradient approximation to…

原子与分子团簇 · 物理学 2009-11-10 Tunna Baruah , Rajendra R. Zope , Mark R. Pederson

Nuclei at both the neutron- and proton-drip lines are studied. In the cluster-core model, the halo-structure of all the observed and proposed cases of neutron- or proton-halos is investigated in terms of simple potential energy surfaces…

核理论 · 物理学 2011-11-09 Raj K. Gupta , Sushil Kumar , M. Balasubramaniam , G. Munzenberg , Werner Scheid

We report results of the observations of 15 regions in several molecular lines for a statistical study of massive cluster-forming clumps. We identified 24 clumps based on the C18O (J=1-0) data obtained by the NRO 45 m telescope, and found…

星系天体物理 · 物理学 2018-03-21 Tomomi Shimoikura , Kazuhito Dobashi , Fumitaka Nakamura , Tomoaki Matsumoto , Tomoya Hirota

Discovery of clusters with high symmetrical geometry, such as C60 fullerene, always attract lots of interest because of their diverse nature. However, most of such interesting cluster were sporadically discovered, is there any systematic…

材料科学 · 物理学 2024-11-05 Silei Wang , Jing Tian , Jiayu Li , Tian Gong , Xing Yan , Jijun Zhao , Xin-Gao Gong , Xiao Gu

We examine the structure and dynamics of small isolated $N$-particle clusters interacting via short-ranged Morse potentials. "Ideally preprared ensembles" obtained via exact enumeration studies of sticky hard sphere packings serve as…

软凝聚态物质 · 物理学 2015-06-22 Robert S. Hoy

We present a study of the optical response of compact and hollow icosahedral clusters containing up to 868 silver atoms by means of time-dependent density functional theory. We have studied the dependence on size and morphology of both the…

材料科学 · 物理学 2016-06-22 Peter Koval , Federico Marchesin , Dietrich Foerster , Daniel Sánchez-Portal

The evolution of the magnetic moment in iron clusters containing 20 to 400 atoms is investigated using first-principles numerical calculations based on density-functional theory and real-space pseudopotentials. Three families of clusters…

材料科学 · 物理学 2009-11-11 Murilo L. Tiago , Yunkai Zhou , M. M. G. Alemany , Yousef Saad , James R. Chelikowsky