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Concealed non-Kekul\'e polybenzenoid hydrocarbons have no sublattice imbalance yet cannot be assigned a classical Kekul\'e structure, leading to an open-shell ground state with potential application in organic spintronics. They constitute…

Mesoscale and Nanoscale Physics · Physics 2025-10-23 Shantanu Mishra , Manuel Vilas-Varela , Igor Rončević , Fabian Paschke , Florian Albrecht , Leo Gross , Diego Peña

The lowest-energy structures of lead clusters interacting via a Gupta potential are obtained for N<151. Structures based on Marks decahedra dominate at the larger sizes. These results are very different from those obtained previously using…

Other Condensed Matter · Physics 2007-05-23 Jonathan P. K. Doye

Materials based on a crown ether complex together with magnetic ions, especially Cu(II), can be used to synthesize new low dimesional quantum spin systems. We have prepared the new crown ether complex…

We show that binary mixtures of Bose-condensates of alkali atoms have a great variety of ground state and vortex structures which can be accessed experimentally by varying the particle numbers of different alkalis. We have constructed a…

Condensed Matter · Physics 2007-05-23 Tin-Lun Ho , V. B. Shenoy

Liquids and solids are two fundamental states of matter. However, due to the lack of direct experimental determination, our understanding of the 3D atomic structure of liquids and amorphous solids remained speculative. Here we advance…

We present a systematic study of the low-energy structures of zinc borohydride, a crystalline material proposed for the hydrogen storage purpose. In addition to the previously proposed structures, many new low-energy structures of zinc…

Materials Science · Physics 2013-03-29 Tran Doan Huan , Maximilian Amsler , Vu Ngoc Tuoc , Alexander Willand , Stefan Goedecker

It is shown that the rotational band structure of the cluster states in 12C and 16O can be understood in terms of the underlying discrete symmetry that characterizes the geometrical configuration of the alpha-particles, i.e. an equilateral…

Nuclear Theory · Physics 2019-10-02 Roelof Bijker

The four most stable structures of Ni$_N$ clusters with $N$ from 2 to 150 have been determined using a combination of the embedded-atom method in the version of Daw, Baskes and Foiles, the {\it variable metric/quasi-Newton} method, and our…

Atomic and Molecular Clusters · Physics 2016-09-08 V. G. Grigoryan , M. Springborg

We present a numerical evaluation of the three-point static correlations functions of the Kob-Andersen Lennard-Jones binary mixture and of its purely repulsive, Weeks-Chandler-Andersen variant. In the glassy regime, the two models possess a…

Statistical Mechanics · Physics 2013-03-01 Daniele Coslovich

A P-type icosahedral quasicrystal is formed in Au-Al-Yb alloy of which 6-dimensional lattice parameter a6D = 7.448 {\AA}. The composition of the quasicrystal was analyzed to be Au51Al34Yb15. This quasicrystal is formed in as-cast alloys,…

Materials Science · Physics 2015-05-27 Tsutomu Ishimasa , Yukinori Tanaka , Shiro Kashimoto

Structural glasses prepared by bulk quenching a liquid melt universally exhibit puzzling low-energy excitations commonly known as the ``two-level systems'' (TLSs). Recent studies indicate that ultrastable glassy films made by vapor…

Disordered Systems and Neural Networks · Physics 2026-04-24 Vassiliy Lubchenko

The heat capacity and isomer distributions of the 38 atom Lennard-Jones cluster have been calculated in the canonical ensemble using parallel tempering Monte Carlo methods. A distinct region of temperature is identified that corresponds to…

Chemical Physics · Physics 2009-11-06 J. P. Neirotti , F. Calvo , David L. Freeman , J. D. Doll

We examine in detail the causes of the structural transitions that occur for those small Lennard-Jones clusters that have a non-icosahedral global minima. Based on the principles learned from these examples we develop a method to construct…

Condensed Matter · Physics 2007-05-23 Jonathan P. K. Doye , Florent Calvo

We argue that 2D dodecagonal spherical quasicrystalls (QCs) will be discovered in the nearest future and investigate how the planar QC order becomes compatible with the spherical geometry. We show that the appearance of curvature-induced…

Soft Condensed Matter · Physics 2014-09-08 I. A. Shevchenko , O. V. Konevtsova , S. B. Rochal

The dibaryon states as six-quark clusters of exotic QCD states are investigated in this paper. With the inherent nodal surface structure analysis, the wave functions of the six-quark clusters (in another word, the dibaryons) are classified.…

Nuclear Theory · Physics 2009-11-07 Yu-xin Liu , Jing-sheng Li , Cheng-guang Bao

For several decades, globular clusters have been considered the best example of simple stellar populations, hosting coeval and chemical homogeneous stars. The last decade of spectroscopic and photometric studies has revealed a more complex…

Solar and Stellar Astrophysics · Physics 2014-01-20 A. Mucciarelli

Low-dimensional quantum magnets are a versatile materials platform for studying the emergent many-body physics and collective excitations that can arise even in systems with only short-range interactions. Understanding their low-temperature…

Complementary one-, two-, and three-dimensional tests for detecting the presence of substructure in clusters of galaxies are applied to recently obtained data from the 2dF Galaxy Redshift Survey. The sample of 25 clusters used in this study…

We model an isothermal aggregation process of particles/atoms interacting according to the Lennard-Jones pair potential by mapping the energy landscapes of each cluster size $N$ onto stochastic networks, computing transition probabilities…

Statistical Mechanics · Physics 2017-06-07 Yakir Forman , Maria Cameron

A new type of a levitating droplet clusters composed of often transforming small aggregates of water droplets is described for the first time. Unlike earlier observed droplet clusters controlled by aerodynamic forces, which formed either an…