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Scattering of electrons by localized spins is the ultimate process enabling electrical detection and control of the magnetic state of a spin-doped material. At the molecular scale, this scattering is mediated by the electronic orbitals…

The peculiarity of the distribution and geometry of metallic ions in enzymes pushed us to set the hypothesis that metallic ions in active-site act like tiny antennas able to pick up very feeble e.m. signals. Enzymatic activity of Cu2+, Zn2+…

Biological Physics · Physics 2008-01-21 A. De Ninno , M. Prosdocimi , V. Ferrari , G. Gerardi , F. Barbaro , T. Badon , D. Bernardini

Charge transfer from a metal substrate stabilizes honeycomb borophene, whose electron deficit would otherwise spoil the hexagonal order of a $\pi$-bonded 2D atomic network. However, the coupling between the substrate and the boron overlayer…

Materials Science · Physics 2022-11-30 Mandana Safari , Erik Vesselli , Stefano de Gironcoli , Stefano Baroni

We study the atomic oxygen adsorption on Pb(111) surface by using density-functional theory within the generalized gradient approximation and a supercell approach. The atomic and energetic properties of purely on-surface and subsurface…

Materials Science · Physics 2009-11-13 Bo Sun , Ping Zhang , Zhigang Wang , Suqing Duan , Xian-Geng Zhao , Xuchun Ma , Qi-Kun Xue

Rate of a reaction is enhanced by increase in temperature, partial pressure or the concentration of reactants, and/or via use of a catalyst or an enzyme. Whereas the former increases the probability of collision rate between different…

Soft Condensed Matter · Physics 2023-02-24 Nitish Singh , Animangsu Ghatak

Ion conducting $(CaO)_x(SiO_2)_{1-x}$ glasses and melts show a threshold behaviour in dc conductivity near $x=x_t=0.50$, with conductivities increasing linearly at $x>x_t$. We show that the behaviour can be traced to a rigid ($x<0.50$) to…

Materials Science · Physics 2009-11-10 M. Malki , M. Micoulaut , F. Chaimbault , Y. Vaills , P. Simon

We study whether Fermi-surface (FS) nesting can give rise to high-temperature superconductivity in iron pnictides. Starting with ab initio construction of an effective four-orbital model, we employ the fluctuation-exchange approximation to…

Superconductivity · Physics 2015-05-14 Ryotaro Arita , Hiroaki Ikeda

Point defect species and concentrations in metastable Fe-C alloys are determined using density functional theory and a constrained free-energy functional. Carbon interstitials dominate unless iron vacancies are in significant excess,…

Materials Science · Physics 2007-05-23 Clemens J. Foerst , Jan Slycke , Krystyn J. Van Vliet , Sidney Yip

Iron chalcogenide Fe(Te,Se) attracted much attention due to its simple structure, which is favorable for probing the superconducting mechanism. Its less toxic nature compared with iron arsenides is also advantageous for applications of…

For generation of sustainable, clean and highly efficient energy, the electrocatalytic oxygen evolution reaction represents an attractive platform, thus inviting immense research activities in recent years. However, designing the catalyst…

Perovskite films have rapidly emerged as leading active materials in optoelectronic devices due to their strong optical absorption, high carrier mobility and ease of fabrication. Whilst proving to be promising materials for solar cells and…

The local structure of a solid-on-solid (SOS) interface in a two-dimensional kinetic Ising ferromagnet with single-spin-flip Glauber dynamics, which is driven far from equilibrium by an applied field, is studied by an analytic mean-field,…

Statistical Mechanics · Physics 2009-11-07 P. A. Rikvold , M. Kolesik

Mg batteries with oxide cathodes have the potential to significantly surpass existing Li-ion technologies in terms of sustainability, abundance, and energy density. However, Mg intercalation at the cathode is often severely hampered by the…

Materials Science · Physics 2023-03-21 Mohsen Sotoudeh , Manuel Dillenz , Johannes Döhn , Julian Hansen , Sonia Dsoke , Axel Groß

First principles calculations are used to study the preferential occupation of ternary alloying additions into the binary Ti-Al phases, namely $\gamma$-TiAl, $\alpha_2$-Ti$_3$Al, $\beta_{\mathrm{o}}$-TiAl, and B19-TiAl. While the early…

Materials Science · Physics 2016-06-22 David Holec , Rajeev K. Reddy , Thomas Klein , Helmut Clemens

Metal-organic frameworks (MOFs) have been widely investigated for challenging catalytic transformations due to their well-defined structures and high degree of synthetic tunability. These features, at least in principle, make MOFs ideally…

Materials Science · Physics 2021-10-19 Andrew S. Rosen , Justin M. Notestein , Randall Q. Snurr

Stationary and instationary Stokes and Navier-Stokes flows are considered on two-dimensional manifolds, i.e., on curved surfaces in three dimensions. The higher-order surface FEM is used for the approximation of the geometry, velocities,…

Computational Engineering, Finance, and Science · Computer Science 2018-08-29 Thomas-Peter Fries

Exotic and robust metallic surface states of topological insulators (TIs) have been expected to provide a promising platform for novel surface chemistry and catalysis. However, it is still an unprecedented field how TIs affect the activity…

Computational Physics · Physics 2015-09-09 Jianping Xiao , Liangzhi Kou , Chi-Yung Yam , Thomas Frauenheim , Binghai Yan

The dynamics of non-equilibrium spin accumulation generated in metals or semiconductors by rf magnetic field pumping is treated within a diffusive picture. The dc spin accumulation produced in a uniform system by a rotating applied magnetic…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 S. M. Watts , J. Grollier , C. H. van der Wal , B. J. van Wees

It is a general challenge to design highly active or selective earth-abundant metals for catalytic hydrogenation. Here, we demonstrated an effective computational approach based on inverse molecular design theory to deterministically search…

Materials Science · Physics 2021-01-12 Dequan Xiao , Trevor Callahan

Three driving forces control the energy level alignment between transition-metal oxides and organic materials: the chemical interaction between the two materials, the organic electronegativity and the possible space charge layer formed in…