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(Fe,Co)$_2$B-based compounds with specified 5$d$ substitutions are considered as promising materials for permanent magnets without rare-earth elements. We conducted a combined first-principles and experimental study focused on…

Adjusting chemical pressure through doping is a highly effective method for customizing the chemical and physical properties of materials, along with their respective phase diagrams, thereby uncovering novel quantum phenomena. Here, we…

Materials Science · Physics 2024-05-15 Qian Zhao , Kaitong Sun , Junchao Xia , Hai-Feng Li

Colloids that interact via a short-range attraction serve as the primary building blocks for a broad range of self-assembled materials. However, one of the well-known drawbacks to this strategy is that these building blocks rapidly and…

Soft Condensed Matter · Physics 2020-09-16 S. A. Mallory , M. L. Bowers , A. Cacciuto

Effect of L-threonine (LT) doping on crystalline perfection, second harmonic generation (SHG) efficiency, optical transparency and laser damage threshold (LDT) in potassium dihydrogen phosphate (KDP) crystals grown by slow evaporation…

Materials Science · Physics 2014-03-20 S. K. Kushwaha , Mohd. Shakir , K. K. Maurya , A. L. Shah , M. A. Wahab , G. Bhagavannarayana

We have performed x-ray absorption spectroscopy (XAS) and x-ray photoemission spectroscopy (XPS) studies of single crystal Ba_{1-x}K_{x}BiO_{3} (BKBO) covering the whole composition range $0 \leq x \leq 0.60$. Several features in the oxygen…

Superconductivity · Physics 2009-10-31 K. Kobayashi , T. Mizokawa , A. Ino , J. Matsuno , A. Fujimori , H. Samata , A. Mishiro , Y. Nagata , F. M. F. de Groot

We have studied the structure of $^4$He droplets doped with magnesium atoms using density functional theory. We have found that the solvation properties of this system strongly depend on the size of the $^4$He droplet. For small drops, Mg…

Other Condensed Matter · Physics 2008-07-14 Alberto Hernando , Manuel Barranco , Ricardo Mayol , Marti Pi , Francesco Ancilotto

Doping dependence of the superconducting state structure and spin-fluctuation pairing mechanism in the $Ba(Fe_{1-x}Co_{x})_{2}As_{2}$ family is studied. BCS-like analysis of experimental data shows that in the overdoped regime, away from…

Superconductivity · Physics 2019-02-20 A. E. Karakozov , M. V. Magnitskaya , L. S. Kadyrov , B. P. Gorshunov

The incorporation paths of Be in GaAs nanowires grown by the Ga-assisted method in molecular beam epitaxy has been investigated by electrical measurements of nanowires with different doping profiles. We find that Be atoms incorporate…

Single crystals of Fe(1+x)Te(1-y)Se(y) have been grown with a controlled Fe excess and Se doping, and the crystal structure has been refined for various compositions. The systematic investigation of magnetic and superconducting properties…

Superconductivity · Physics 2015-05-14 R. Viennois , E. Giannini , D. van der Marel , R. Cerny

AgF$_2$ is a correlated charge-transfer insulator with properties remarkably similar to insulating cuprates which have raised hope that it may lead to a new family of unconventional superconductors upon doping. We use ab initio computations…

Strongly Correlated Electrons · Physics 2021-06-16 Subrahmanyam Bandaru , Mariana Derzsi , Adam Grzelak , Jose Lorenzana , Wojciech Grochala

This work investigates how site-specific doping can enhance the thermoelectric performance of tetragonal Cu$_{2}$S using Density functional Theory and Projected Atomic Orbital Framework for Electronic Transport. We address the gap in…

Materials Science · Physics 2025-01-29 Sonam Phuntsho

Phase diagram of electron and hole-doped SrFe2As2 single crystals is investigated using Co and Mn substitution at the Fe-sites. We found that the spin-density-wave state is suppressed by both dopants, but the superconducting phase appears…

Superconductivity · Physics 2015-05-18 J. S. Kim , Seunghyun Khim , H. J. Kim , M. J. Eom , J. Law , R. K. Kremer , Ji Hoon Shim , Kee Hoon Kim

The effects of isovalent doping on the superconducting transition temperature Tc in novel 112-type iron arsenide Ca1-xLaxFeAs2 were studied by conducting measurements of electrical resistivity rho and magnetization M. P or Sb doping…

SnSe monolayer with orthorhombic Pnma GeS structure is an important two-dimensional (2D) indirect band gap material at room temperature. Based on first-principles density functional theory calculations, we present systematic studies on the…

Computational Physics · Physics 2016-03-17 Qingxia Wang , Weiyang Yu , Xiaonan Fu , Chong Qiao , Congxin Xia , Yu Jia

The electronic properties of Fe-based superconductors are drastically affected by deformations on their crystal structure introduced by doping and pressure. Here we study single crystals of FeSe$_{1-x}$S$_{x}$ and reveal that local crystal…

This study investigates the structural, electronic, and catalytic properties of pristine and doped C$_4$N$_2$ nanosheets as potential electrocatalysts for the hydrogen evolution reaction. The pristine C$_{36}$N$_{18}$ nanosheets exhibit…

Superconductivity in ultra-doped $Si_{1-x}Ge_{x}:B$ epilayers is demonstrated by nanosecond laser doping, which allows introducing substitutional B concentrations well above the solubility limit and up to $7\,at.\%$. A Ge fraction $x$…

Superconductivity · Physics 2024-04-04 S. Nath , I. Turan , L. Desvignes , L. Largeau , O. Mauguin , M. Túnica , M. Amato , C. Renard , G. Hallais , D. Débarre , F. Chiodi

We investigated the influence of different Ag additions (up to 10 wt %) on the superconducting properties of FeSe0.94. The structural investigations (XRD and SEM) indicated that Ag is present in three different forms. Ag at grain boundaries…

Superconductivity · Physics 2015-10-08 E. Nazarova , N. Balchev , K. Nenkov , K. Buchkov , D. Kovacheva , A. Zahariev , G. Fuchs

Hybrid Monte Carlo (MC)/molecular dynamics (MD) simulations are conducted to study the microstructures of nanocrystalline (nc) Cu/Ag alloys with various Ag concentrations. When the Ag concentration is below 50 Ag atoms/nm!, an increase in…

Materials Science · Physics 2017-04-05 A. Li , I. Szlufarska

We report on doping dependencies of structural parameters and superconducting transition temperatures in the solid solution (Ba1-xKx)Fe2As2. As the main effect of doping on the crystal structure, we find linear decreasing As-Fe-As bond…

Superconductivity · Physics 2008-09-26 Marianne Rotter , Michael Pangerl , Marcus Tegel , Dirk Johrendt
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