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Developing phosphors with narrow photoluminescence emission peaks and high chromatic stability holds significant importance in light-emitting diode (LED) display technologies, where a wide color gamut is essential to achieve the Rec. 2020…

Materials Science · Physics 2025-03-04 Nakyung Lee , Justyna Zeler , Małgorzata Sójka , Eugeniusz Zych , Jakoah Brgoch

Predictions of elliptic flow ($v_2$) and nuclear modification factor ($R_{AA}$) are provided as a function of centrality in U + U collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV. Since the $^{238}$U nucleus is naturally deformed, one could…

Nuclear Theory · Physics 2009-11-05 Hiroshi Masui , Bedangadas Mohanty , Nu Xu

Phase stability of various phases of MX (M = Ti, Zr; X = C, N) at equilibrium and under pressure is examined based on first-principles calculations of the electronic and phonon structures. The results reveal that all B1 (NaCl-type) MX…

Materials Science · Physics 2013-09-25 V. I. Ivashchenko , P. E. A. Turchi , V. I. Shevchenko

First principles density functional theory calculations within the GGA+U approximation were performed for LiMn$_{1-x}$M$_x$O$_{2}$, a candidate cathode material for lithium-ion batteries, with ($x=0.25$, M=Ni, Fe, Co, Mg), to investigate…

Materials Science · Physics 2008-07-01 N. N. Shukla , S. Shukla , R. Prasad , R. Benedek

The equations of state at room temperature as well as the energies of crystal structures up to pressures exceeding 100 GPa are calculated for Na and K . It is shown that the allowance for generalized gradient corrections (GGA) in the…

Materials Science · Physics 2009-10-31 M. I. Katsnelson , G. V. Sinko , N. A. Smirnov , A. V. Trefilov , K. Yu. Khromov

Our study is motivated by the prospect of several metastable states in the Sb$ ^{+} $, Au$ ^{+} $, and Hg$ ^{2+} $ ions being used as possible candidates for optical clocks. We calculate several atomic properties relevant to the development…

Atomic Physics · Physics 2023-06-21 Saleh O. Allehabi , V. A. Dzuba , V. V. Flambaum

Using ab initio Density Functional Theory (DFT) calculations, we investigate the electronic structure, phase stability, and magnetic properties of equiatomic binary alloys between Al and 3d magnetic transition elements (Cr, Mn, Fe, Co, and…

Materials Science · Physics 2025-10-28 Haireguli Aihemaiti , Esmat Dastanpour , Anders Bergman , Levente Vitos

In the Letter [J. Nucl. Mater. 444, 356 (2014)] and Comment [Phys Rev B 90, 157101 (2014)], Soderlind et al. argue that 1) DFT based on GGA already models U metal and U-Zr alloy accurately, and 2) DFT + U models them worse than DFT…

Materials Science · Physics 2016-02-01 Wei Xie , Chris A. Marianetti , Dane Morgan

In this work we present an experimental study of structure and phase stability in ternary Cu-Sn-In alloys around 55 at.% Cu in the temperature range 100^{\circ}C < T < 550^{\circ}C. We have followed in real-time the sequence of phase…

Materials Science · Physics 2015-06-05 G. Aurelio , S. A. Sommadossi , G. J. Cuello

Previous first-principles calculations of the melting properties of Si, based on the local-density approximation (LDA) for electronic exchange-correlation energy, under-predict the melting temperature by ~ 20%. We present new…

Materials Science · Physics 2016-08-16 D. Alfè , M. J. Gillan

The ability to predict the composition- and temperature-dependent stability of refractory complex concentrated alloys (RCCAs) is vital to the design of high-temperature structural alloys. Here, we present a model based on first-principles…

Materials Science · Physics 2022-10-27 Zhaohan Zhang , Mu Li , John Cavin , Katharine Flores , Rohan Mishra

Neutron elastic, inelastic and high energy x-ray scattering techniques are used to explore the nature of the polaron order and dynamics in La0.7Ca0.3MnO3. Static polaron correlations develop within a narrow temperature regime as the Curie…

Strongly Correlated Electrons · Physics 2007-08-02 J. W. Lynn , D. N Argyriou , Y. Ren , Y. Chen , Y. M. Mukovskii , D. A. Shulyatev

Results of crystallographic refinement, the relationship between electron counts and structural stability, and magnetic characterization of YT$_x$Ge$_2$ (T= Cr, Mn, Fe, Co, and Ni) prepared using the arc melting method are presented. These…

Materials Science · Physics 2017-12-25 Lea Gustin , Lingyi Xing , Max T. Pan , Rongying Jin , Weiwei Xie

U-based binary alloys have been widely adopted in fast nuclear reactors, but their stability under extreme conditions of high-pressure is almost unknown, mounting up to latent risk in applications. Here, possible ordered phases in U-Zr…

Materials Science · Physics 2024-02-27 Xiao L. Pan , Hong X. Song , H. Wang , F. C. Wu , Y. C. Gan , Xiang R. Chen , Ying Chen , Hua Y. Geng

A series of Pr(TM)$_2$X$_{20}$ (with TM=Ti,V,Rh,Ir and X=Al,Zn) Kondo materials, containing non-Kramers Pr$^{3+}$ $4f^2$ moments on a diamond lattice, have been shown to exhibit intertwined orders such as quadrupolar order and…

Strongly Correlated Electrons · Physics 2018-11-07 SungBin Lee , Simon Trebst , Yong Baek Kim , Arun Paramekanti

X-ray and neutron powder diffraction data as a function of temperature are analyzed for the colossal dielectric constant material CaCu3Ti4O12. The local structure is studied using atomic pair distribution function analysis. No evidence is…

Materials Science · Physics 2009-11-10 E. S. Bozin , V. Petkov , P. W. Barnes , P. M. Woodward , T. Vogt , S. D. Mahanti , S. J. L. Billinge

The metallic compound NaRh2O4 forms a full range solid solution to the insulating phase CaRh2O4. At a Na concentration of 0.25 moles per formula unit, we found an unexpected contribution to the specific heat at low temperature [K. Yamaura…

Strongly Correlated Electrons · Physics 2009-11-11 K. Yamaura , Q. Huang , M. Moldovan , D. P. Young , X. L. Wang , E. Takayama-Muromachi

The electron dynamics in the normal state of Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ is studied by inelastic light scattering over a wide range of doping. A strong anisotropy of the electron relaxation is found which cannot be explained by…

Superconductivity · Physics 2009-11-07 F. Venturini , M. Opel , T. P. Devereaux , J. K. Freericks , I. Tüttő , B. Revaz , E. Walker , H. Berger , L. Forró , R. Hackl

We have investigated the pressure dependence of the superconducting transition temperature $T_{c}$ up to 18 GPa of Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+\delta}$ single crystals ranging from the highly underdoped through the nearly optimally…

Superconductivity · Physics 2009-11-10 Xiao-Jia Chen , Viktor V. Struzhkin , Russell J. Hemley , Ho-kwang Mao , Chris Kendziora

The chiral condensate and dressed Polyakov loop at finite temperature and density have been investigated in the framework of Nf = 2+1 Nambu-Jona-Lasinio (NJL) model with two degenerate u, d quarks and one strange quark. In the case of…

High Energy Physics - Phenomenology · Physics 2015-05-27 Fukun Xu , Hong Mao , Tamal K. Mukherjee , Mei Huang
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