نتایج جستجو برای: crystal atomic structure

تعداد نتایج: 1716189  

Journal: :Physical review letters 2013
U Bissbort D Cocks A Negretti Z Idziaszek T Calarco F Schmidt-Kaler W Hofstetter R Gerritsma

We propose and theoretically investigate a hybrid system composed of a crystal of trapped ions coupled to a cloud of ultracold fermions. The ions form a periodic lattice and induce a band structure in the atoms. This system combines the advantages of high fidelity operations and detection offered by trapped ion systems with ultracold atomic systems. It also features close analogies to natural s...

2016
Michael S. Titus Robert K. Rhein Peter B. Wells Philip C. Dodge Gopal Babu Viswanathan Michael J. Mills Anton Van der Ven Tresa M. Pollock

It has long been known that solute segregation at crystalline defects can have profound effects on material properties. Nevertheless, quantifying the extent of solute segregation at nanoscale defects has proven challenging due to experimental limitations. A combined experimental and first-principles approach has been used to study solute segregation at extended intermetallic phases ranging from...

Journal: :Crystals 2023

Rare-earth fluorine-containing molybdates of the Ln5Mo3O16+δ oxygen–electron conductor family with LiLa4Mo3O15F composition were synthesized for first time as single crystals by flux method. An accurate X-ray diffraction analysis obtained was carried out at 20 and −183 °C. The compound is isostructural to fluorine-free analogue a cubic structure (space group Pn3¯n). It shown that lithium atoms ...

Journal: :Journal of molecular biology 1996
J Pontius J Richelle S J Wodak

Standard ranges of atomic and residue volumes are computed in 64 highly resolved and well-refined protein crystal structures using the classical Voronoi procedure. Deviations of the atomic volumes from the standard values, evaluated as the volume Z-scores, are used to assess the quality of protein crystal structures. To score a structure globally, we compute the volume Z-score root mean square ...

2012
Deok-Yong Cho Hyung Suk Jung Il-Hyuk Yu Jung Ho Yoon Hyo Kyeom Kim Sang Young Lee Sang Ho Jeon Seungwu Han Jeong Hwan Kim Tae Joo Park Byeong-Gyu Park Cheol Seong Hwang

The structural and electronic properties of HfO2 thin films grown by atomic layer deposition (ALD) under various ozone concentrations were investigated using X-ray diffraction (XRD), photoemission (XPS), reflectometry (XRR), and absorption spectroscopy (XAS) and their fine structure (XAFS) analysis. It was found that in the as-grown states, the oxygen stoichiometry and local atomic structure in...

2007
G. Campi A. Bianconi

We have studied temperature evolution of the local as well as the average crystal structure of MgB2 and Mg0.5Al0.5B2 using real-space atomic pair distribution function (PDF) measured by high resolution neutron powder diffraction in a wide temperature range of T = 10–600 K. The mean square relative displacements (MSRD) of atomic B–B, B–Mg (B–Al) pairs are compared with mean-square displacements ...

Different Aluminum: alkaline earth metal atomic weight ratios effects on structure transformations in alanates nanopowders were studied. Changes in crystal structures from alane to alanates by increasing alkaline earth metals dopants in the mixture with slight changes in crystal structures from rhombohedral centered – trigonal (alane) to trigonal (magnesium alanate), and monoclinic (calcium ala...

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