نتایج جستجو برای: crystal symmetry

تعداد نتایج: 238788  

2009
L. R. BICKFORD

The general behavior of majrn»!it< (iron ferrite) at its low temperature transformation (ca 1!8°K) is reviewed. One of the properties which undergoes a largr change is the magnetocrystailine snisotropy, which is larger in magnitude and has a lower symmetry below the transformation. The magnetic symmetry axis below the transition tempeiature can be predetermined by cooling a single crystal throu...

Journal: :Acta Crystallographica Section A Foundations of Crystallography 2006

2009
John Hunt

The structure of a crystalline material may be described by a crystal lattice structure and the locations of atoms in this lattice. The crystal lattice is a 3-dimensional periodic array that defines the symmetries, i.e. shape, of the crystal. There are seven possible crystal lattices: cubic, hexagonal, tetragonal, rombohedral, orthorhombic, monoclinic and triclinic. When we define the possible ...

Journal: :Journal of Physics: Condensed Matter 2021

Crystal structure determines properties of materials. With the crystal a chemical substance, many physical and can be predicted by first-principles calculations or machine learning models. Since it is relatively easy to generate hypothetical chemically valid formula, prediction becomes an important method for discovering new In our previous work, we proposed contact map-based method, which uses...

Journal: :Physical review 2022

It was recently discovered that atoms subject to a time-periodic drive can give rise crystal structure in phase space. In this work, we point out the atom-atom interactions collective phonon excitations of phase-space via pairing interaction with intrinsically complex phases lead Chern insulator, accompanied by topologically robust chiral transport along edge crystal. This topological is realiz...

2008
J. C. Dore J. B. W. Webber

Cyclohexane, C6H12, is one of the simplest organic molecules due to its sixfold symmetry and weak van der Waals interaction. The dynamic characteristics have been extensively studied in the liquid and plastic crystal phases by spectroscopic means and have been analysed in terms of an unhindered rotator model. The transition from the liquid to the plastic crystal at 6.55C involves a low entropy ...

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