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Although unstable, the Si(337) orientation has been known to appear in diverse experimental situations such as the nanoscale faceting of Si(112), or in the case of miscutting a Si(113) surface. Various models for Si(337) have been proposed…

Materials Science · Physics 2007-05-23 F. C. Chuang , C. V. Ciobanu , C. Z. Wang , K. M. Ho

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…

Mesoscale and Nanoscale Physics · Physics 2015-03-06 Danielle McDermott , Kathie E. Newman

Silicon carbide (SiC) is one of the major cosmic dust components in carbon-rich environments. However, the formation of SiC dust is not well understood. In particular, the initial stages of the SiC condensation (i.e. the SiC nucleation)…

Astrophysics of Galaxies · Physics 2021-05-05 David Gobrecht

Raman spectroscopy has been used to identify defective bonding in neon and silicon ion irradiated single crystals of 6H-SiC. Observable differences exist in the C-C bonding region corresponding to different defect structures for neon and…

Materials Science · Physics 2020-07-06 Alexander J. Leide , Matthew J. Lloyd , Richard I. Todd , David E. J. Armstrong

The influence of implantation-induced point defects (PDs) on SiC oxidation is investigated via molecular dynamics simulations. PDs generally increase the oxidation rate of crystalline grains. Particularly, accelerations caused by Si…

Materials Science · Physics 2021-04-01 Jianqi Xi , Cheng Liu , Izabela Szlufarska

By applying our methodology, we propose a defect in 4H-SiC which combines a Si vacancy and a C atom substituted with S (VSiSC) to have a spin-triplet ground state with the spin qubit functionality. Our calculations confirm that all…

Materials Science · Physics 2026-04-17 Marisol Alcántara Ortigoza , Sergey Stolbov

We derived surface brightness profiles in the \emph{g} band for 170 Small Magellanic Cloud (SMC) star clusters (SCs) mainly located in the central region of the galaxy. We provide a set of homogeneous structural parameters obtained by…

Astrophysics of Galaxies · Physics 2021-08-18 M. Gatto , V. Ripepi , M. Bellazzini , M. Tosi , M. Cignoni , C. Tortora , S. Leccia , G. Clementini , E. K. Grebel , G. Longo , M. Marconi , I. Musella

The physical properties of star cluster populations offer valuable insights into their birth, evolution, and disruption. However, individual stars in clusters beyond the nearest neighbours of the Milky Way are unresolved, forcing analyses…

Astrophysics of Galaxies · Physics 2024-07-24 Jianling Tang , Kathryn Grasha , Mark R. Krumholz

Adaptive optics observations of the flattened nuclear star cluster in the nearby edge-on spiral galaxy NGC 4244 using the Gemini Near-Infrared Integral Field Spectrograph (NIFS) have revealed clear rotation. Using these kinematics plus…

Astrophysics of Galaxies · Physics 2015-06-11 F. De Lorenzi , M. Hartmann , V. P. Debattista , A. C. Seth , O. Gerhard

Even when starting with a very poor initial guess, the iterative configuration interaction (iCI) approach can converge from above to full CI very quickly by constructing and diagonalizing a small Hamiltonian matrix at each…

Chemical Physics · Physics 2020-01-07 Ning Zhang , Wenjian Liu , Mark R. Hoffmann

Our objective is to investigate the physical properties of the ionised gas of the low-metallicity dwarf galaxy, IC 10, at various spatial scales: from individual HII regions to the entire galaxy scale and examine whether diagnostics for…

Although point defects in solids are one of the most promising physical systems to build functioning qubits, it remains challenging to position them in a deterministic array and to integrate them into large networks. By means of advanced ab…

Materials Science · Physics 2024-06-12 Daniel Barragan-Yani , Ludger Wirtz

We assess whether intracluster light (ICL) can serve as an observational discriminator of dark matter physics. The self-interacting dark matter (SIDM) model has gained increasing attention as a possible resolution to small-scale…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-07 Jaewon Yoo , Ellen L. Sirks , Cristiano G. Sabiu , Changbom Park , Jaehyun Lee , Ankit Singh , Juhan Kim , Jongwan Ko

Neutron irradiation progressively changes the properties of zirconium alloys: they harden and their average c/a lattice parameter ratio decreases with fluence. The bombardment by neutrons produces point defects, which evolve into…

Materials Science · Physics 2021-02-03 Rory Hulse , Christopher P Race

Self-interacting dark matter (SIDM) has been proposed to solve small-scale problems in $\Lambda$CDM cosmology. In previous work, constraints on the self-interaction cross-section of dark matter have been derived assuming that the…

Cosmology and Nongalactic Astrophysics · Physics 2024-07-03 V. M. Sabarish , Marcus Brüggen , Kai Schmidt-Hoberg , Moritz S. Fischer , Felix Kahlhoefer

Crystal structure prediction (CSP) has emerged as one of the most important approaches for discovering new materials. CSP algorithms based on evolutionary algorithms and particle swarm optimization have discovered a great number of new…

Materials Science · Physics 2022-04-06 Wenhui Yang , Edirisuriya M. Dilanga Siriwardane , Jianjun Hu

Stochasticity of bright stars introduces uncertainty and bias into derived structural parameters of star clusters. We have simulated a grid of cluster $V$-band images, observed with Subaru Suprime-Cam with age, mass, and size representing a…

Astrophysics of Galaxies · Physics 2018-03-14 D. Narbutis , R. Stonkutė , P. de Meulenaer , T. Mineikis , V. Vansevičius

Among the silicon bearing species discovered in the interstellar medium, SiS and SiO stand out as key tracers due to their distinct chemistry and abundances in interstellar and circumstellar environments. Our objective is to enhance the…

Astrophysics of Galaxies · Physics 2024-07-17 Edgar Mendoza , Samuel F. M. Costa , Miguel Carvajal , Sérgio Pilling , Márcio O. Alves , Breno R. L. Galvão

The algebraic cluster model is is applied to study cluster states in the nuclei 12C and 16O. The observed level sequences can be understood in terms of the underlying discrete symmetry that characterizes the geometrical configuration of the…

Nuclear Theory · Physics 2017-11-02 Roelof Bijker

Many young star clusters appear to be fractal, i.e. they appear to be concentrated in a nested hierarchy of clusters within clusters. We present a new algorithm for statistically analysing the distribution of stars to quantify the level of…

Astrophysics of Galaxies · Physics 2017-01-20 S. E. Jaffa , A. P. Whitworth , O. Lomax