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UO2 and (U,Pu)O2 solid solutions (the so-called MOX) nowadays are used as commercial nuclear fuels in many countries. One of the safety issues during the storage of these fuels is related to their self-irradiation that produces and…

材料科学 · 物理学 2015-05-18 D. Gryaznov , S. Rashkeev , E. A. Kotomin , E. Heifets , Y. Zhukovskii

The Fe-Cu system has attracted much attention over the last several decades due to its technological importance as a model alloy for Cu steels. In spite of these efforts several aspects of its phase diagram remain unexplained. Here we use…

材料科学 · 物理学 2013-11-20 Paul Erhart , Jaime Marian , Babak Sadigh

We calculate the effects of carrier-density structuration and patterning on thin films of the cuprate superconductor La$_{2-x}$Sr$_{x}$CuO$_{4}$, in order to optimize its functional characteristics as sensing material for resistive…

超导电性 · 物理学 2024-12-02 M. M. Botana , A. S. Viz , M. V. Ramallo

A method has been developed to permit the diffusion of Sb into Ge at high temperatures (~850 C) without contamination by fast diffusing electrically active impurities in particular by Cu. A liquid metal alloy is used as a getter of Cu and…

材料科学 · 物理学 2007-05-23 D. Alexiev , D. A. Prokopovich , L. Mo

We report an optical spectroscopy study on the newly discovered superconductor Cu$_{0.07}$TiSe$_2$. Consistent with the development from a semimetal or semiconductor with a very small indirect energy gap upon doping TiSe$_2$, it is found…

超导电性 · 物理学 2009-11-13 G. Li , W. Z. Hu , J. Dong , D. Qian , D. Hsieh , M. Z. Hasan , E. Morosan , R. J. Cava , N. L. Wang

We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of momentum-dependent charge excitations in Nd$_{2-x}$Ce$_x$CuO$_4$ ($x$ = 0.075 and 0.18). The peak position and width of the excitations coincide excellently with…

We have studied the electronic structure of unoccupied states measured by O K-edge and Cu L-edge x-ray absorption spectroscopy (XAS), combined with crystal structure studied by high resolution powder x-ray diffraction (HRPXRD), of…

超导电性 · 物理学 2014-03-28 S. Agrestini , S. Sanna , K. Zheng , R. De Renzi , E. Pusceddu , G. Concas , N. L. Saini , A. Bianconi

The crystal structure of the copper(II) tellurium(IV) oxochloride Cu$_{4}$Te$_{5}$O$_{12}$Cl$_{4}$ (Cu-45124) is composed of weakly coupled tetrahedral Cu clusters and shows crystallographic similarities with the intensively investigated…

Interdiffusion phenomena between adjacent materials are highly prevalent in semiconductor device architectures and can present a major reliability challenge for the industry. To fully capture and better understand these phenomena,…

We present a detailed study of the adsorption of CO on Cu, Rh, and Pt (111) surfaces in top and hollow sites. The study has been performed using the local density approximation, the gradient corrected functional PBE, and the hybrid…

材料科学 · 物理学 2011-12-30 A. Stroppa , K. Termentzidis , J. Paier , G. Kresse , J. Hafner

Induction of holes not only in the superconductive CuO2 plane but also in the Bi2O2+d charge reservoir of the Bi2Sr2(Y1-xCax)Cu2O8+d superconductor upon CaII-for-YIII substitution is evidenced by means of two independent techniques, i.e.,…

超导电性 · 物理学 2009-11-10 M. Karppinen , M. Kotiranta , T. Nakane , H. Yamauchi , S. C. Chang , R. S. Liu , J. M. Chen

Tungsten (W) exhibits desirable properties for extreme applications, such as the divertor in magnetic fusion reactors, but its practicality remains limited due to poor formability and insufficient irradiation resistance. In this work, we…

材料科学 · 物理学 2025-03-11 Akshay Korpe , Osman El-Atwani , Enrique Martinez Saez

This study explores the relationship between phonon dynamics and negative thermal expansion (NTE) in Cu$_x$Ni$_{2-x}$(CN)$_4$. The partial replacement of nickel (II) by copper (II) in Ni(CN)$_2$ leads to a line phase, CuNi(CN)$_4$ (x = 1),…

材料科学 · 物理学 2019-10-02 Stella d'Ambrumenil , Mohamed Zbiri , Ann Chippindale , Simon Hibble

We have performed resonant inelastic x-ray scattering (RIXS) near the Cu-K edge on cuprate superconductors La(2-x)Sr(x)CuO(4), La(2-x)Ba(x)CuO(4), La(2-x)Sr(x)Cu(1-y)Fe(y)O(4) and Bi(1.76)Pb(0.35)Sr(1.89)CuO(6+d), covering underdoped to…

IV-VI diluted magnetic semiconductor Ge1-xCrxTe layers up to x=0.1 were grown on SrF2 substrates by molecular beam epitaxy. In site reflection high-energy electron diffraction shows a streaky pattern with sixfold symmetry in the plane for…

材料科学 · 物理学 2016-03-01 Y. Fukuma , H. Asada , S. Senba , T. Koyanagi

By means of high-pressure resistivity measurements on single crystals, we investigate the charge transport properties of Cu$_x$PdTe$_2$, notable for the combination of topological type-II Dirac semimetallic properties with superconductivity…

超导电性 · 物理学 2021-06-11 H. Yang , M. K. Hooda , C. S. Yadav , D. Hrabovsky , A. Gauzzi , Y. Klein

This study investigates the activation behavior of $TiFe_{0.80}$-$X_{0.20}$ (X = Co, Cu, Cr, Al) alloys to identify the most effective materials for producing hydrogen storage alloys from recycled sources in view of a circular economy…

X-ray diffraction was employed to study the evolution of the charge density wave (CDW) in CuxTiSe2 as a function of copper intercalation in order to clarify the relationship between the CDW and superconductivity. The results show a CDW…

Efficient adsorption and segregation of Xe & Kr gases is of high importance in commercial as well as nuclear industries. Systematic ab initio calculations reveal that transition metal (TM) decorated boron doped graphene (BDG-TM) sheet can…

材料科学 · 物理学 2021-09-09 P. Anees

The electronic and transport properties of CuInTe2 chalcopyrite are investigated using density functional calculations combined with Boltzmann theory. The band gap predicted from hybrid functional is 0.92 eV, which agrees well with…

材料科学 · 物理学 2016-01-06 J. Wei , H. J. Liu , L. Cheng , J. Zhang , J. H. Liang , P. H. Jiang , D. D. Fan , J. Shi