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We have observed spontaneous formation of a stationary vortex structure in a rotating magnetized plasma produced in a linear ECR plasma device named HYPER-I at National Institute for Fusion Science. The vortex appears with a deep…

Plasma Physics · Physics 2007-05-23 Shinji Yoshimura , Atushi Okamoto , Masayoshi Y. Tanaka

We examine the vibrational stability of three candidate structures for the B24N24 cage and report their infra-red (IR) and Raman spectra. The candidate structures considered are a round cage with octahedral O symmetry, a cage with S_4…

Atomic and Molecular Clusters · Physics 2016-09-08 Rajendra R. Zope , Tunna Baruah , Mark R. Pederson , Brett I. Dunlap

We study spontaneous-symmetry-broken phase-separated vortex lattice in a weakly interacting uniform rapidly rotating binary Bose superfluid contained in a quasi-two-dimensional circular or square bucket. For the inter-species repulsion…

Quantum Gases · Physics 2019-12-30 S K Adhikari

"Brane supersymmetry breaking" is a peculiar phenomenon that can occur in perturbative orientifold vacua. It results from the simultaneous presence, in the vacuum, of non-mutually BPS sets of BPS branes and orientifolds, which leave behind…

High Energy Physics - Theory · Physics 2017-12-01 J. Mourad , A. Sagnotti

In this work, we foresee the structure of a new class of borophenes with smaller 2D densities of atoms than those explored so far for 2D boron crystals. Boron atoms in the porous borophenes tend to be $5$-coordinated in contrast to commonly…

Materials Science · Physics 2021-11-25 T. Tarkowski , M. Marchwiany , N. Gonzalez Szwacki

We further elaborate on the triviality and spontaneous symmetry breaking scenario where the Higgs boson without self-interaction coexists with spontaneous symmetry breaking. The trivial Higgs boson is rather heavy with mass m_H = 754 +/- 20…

High Energy Physics - Phenomenology · Physics 2011-06-22 P. Cea , L. Cosmai

Atoms within moir\'e bilayers relax in-plane to minimize elastic energy [e.g., Cazeaux et al., J. Elast. 154, 443 (2023)]; such relaxation brings their space group symmetries down to P1. Here, the ab initio second harmonic generation (SHG)…

A line of hard spheres confined by a transverse harmonic potential, with hard walls at its ends, exhibits a variety of buckled structures as it is compressed longitudinally. Here we show that these may be conveniently observed in a rotating…

Soft Condensed Matter · Physics 2019-09-24 Jens Winkelmann , Adil Mughal , Denis Weaire , Stefan Hutzler

Using the minima hopping global geometry optimization method on the density functional potential energy surface we study medium size and large boron clusters. Even though for isolated medium size clusters the ground state is a cage like…

Atomic and Molecular Clusters · Physics 2015-03-17 Sandip De , Alexander Willand , Maximilian Amsler , Pascal Pochet , Luigi Genovese , Stefan Goedecker

We propose an alternative mechanism of baryogenesis in which a scalar baryon undergoes a percolating first-order phase transition in the early Universe. The potential barrier that divides the phases contains explicit B and CP violation and…

High Energy Physics - Phenomenology · Physics 2015-06-05 Clifford Cheung , Alex Dahlen , Gilly Elor

We discuss the formation and evolution of boxy/peanut bulges (B/Ps) and present new simulations results. Orbital structure studies show that B/Ps are parts of bars seen edge-on, they have their origin in vertical instabilities of the disc…

Astrophysics · Physics 2015-05-13 E. Athanassoula , I. Martinez-Valpuesta

We consider the generation of the baryon asymmetry in the two-Higgs doublet model. Investigating the thermal potential in the presence of CP violation, as relevant for baryogenesis, we find a strong first-order phase transition if the extra…

High Energy Physics - Phenomenology · Physics 2011-09-29 Lars Fromme , Stephan J. Huber , Michael Seniuch

In this work we present a systematic Raman Scattering study in the Ca$_{1-x}$% Eu$_{x}$B$_{6}$ series ($0.00\leqslant x\leqslant 1.00$). Our results are the first experimental evidence for the occurrence of a local symmetry break of the…

Strongly Correlated Electrons · Physics 2007-05-23 H. Martinho , C. Rettori , Z. Fisk , S. B. Oseroff

In this work, we present large-scale electron-correlated computations on various conformers of B$_{12}$H$_{12}$ and B$_{12}$H$_{6}$ clusters, to understand the reasons behind the high stability of di-anion icosahedron ($I_{h}$) and…

Chemical Physics · Physics 2022-01-03 Pritam Bhattacharyya , Ihsan Boustani , Alok Shukla

Experimental and theoretical studies of the unoccupied electronic structure of CaCu2O3 single crystals have been performed using polarization-dependent x-ray absorption spectroscopy and band structure calculations. The measured hole…

Strongly Correlated Electrons · Physics 2009-11-07 T. K. Kim , H. Rosner , S. -L. Drechsler , Z. Hu , C. Sekar , G. Krabbes , J. Malek , M. Knupfer , J. Fink , H. Eschrig

Using a systematic search algorithm we identify several types of point defects in the boron fullerene with 80 atoms. All these point defect leave the cage structure intact. In addition the cage structure is also very stable with respect to…

Materials Science · Physics 2009-02-11 Kuo Bao , Stefan Goedecker , Luigi Genovese , Alexey Neelov , S. Alireza Ghasemi , Thierry Deutsch

We investigate the stability of boron fullerene sets B76, B78 and B82. We evaluate the ground state energies, nucleus-independent chemical shift (NICS), the binding energies per atom and the band gap values by means of first-principles…

Materials Science · Physics 2017-09-13 Serkan Polad , Mete Ozay

In this short note we consider a permitted region in the space of couplings of the 126 GeV boson that extends far away from the standard model Higgs couplings. This region is of interest for more natural models of electroweak symmetry…

High Energy Physics - Phenomenology · Physics 2013-06-10 B. Holdom

We study the coupled system consisting of a complex matter scalar field, a U(1) gauge field, and a complex Higgs scalar field that causes spontaneously symmetry breaking. We show by numerical calculations that there are spherically…

High Energy Physics - Theory · Physics 2019-04-03 Hideki Ishihara , Tatsuya Ogawa

We present results of computer simulations of amorphous Si3B3N7 ceramics. The computed pair correlation functions are in agreement with the experimental results. Regarding the structural properties of the B-N, Si-N and N-Si/B coordination…

Materials Science · Physics 2007-05-23 A. Hannemann , J. C. Schoen , C. Oligschleger , M. Jansen