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We present periodic Density Functional Theory calculations of the electronic properties of molecular junctions formed by amine-, and thiol-terminated alkane chains attached to two metal (Au, Ag) electrodes. Based on extensive analysis that…

Mesoscale and Nanoscale Physics · Physics 2008-07-02 Jian-guo Wang , Emil Prodan , Roberto Car , Annabella Selloni

We report large negative electron affinity (NEA) on diamond (100) using magnesium adsorption on a previously oxygen-terminated surface. The measured NEA is up to $(-2.01\pm0.05)$ eV, the largest reported negative electron affinity to date.…

Point defects in Ga- and Al-doped ZnO thin films are studied by means of first principles electronic structure calculations. Candidate defects are identified to explain recently observed differences in electrical and spectroscopical…

Materials Science · Physics 2016-10-06 E. Menéndez-Proupin , P. Palacios , P. Wahnón

Plasmonic nanostructures enable efficient light-to-energy conversion by concentrating optical energy into nanoscale volumes. A key mechanism in this process is chemical interface damping (CID), where surface plasmons are damped by adsorbed…

Using first-principles calculations based on density-functional theory (DFT) we investigated the effects of the van der Waals (vdW) interactions on the structural and electronic properties of anthracene and pentacene adsorbed on the Ag(111)…

Materials Science · Physics 2017-03-16 Juliana M. Morbec , Peter Kratzer

The electron self-energy of the t1u states in A3C60 (A=K, Rb) is calculated using the so-called GW approximation. The calculation is performed within a model which considers the t1u charge carrier plasmon at 0.5 eV and takes into account…

Strongly Correlated Electrons · Physics 2009-10-30 O. Gunnarsson

Equilibrium atomic configurations and electron energy structure of ethanol adsorbed on the Si (111) surface are studied by the first-principles density functional theory. Geometry optimization is performed by the total energy minimization…

Computational Physics · Physics 2008-02-11 A. V. Gavrilenko , C. E. Bonner , V. I. Gavrilenko

Ab-initio, self-consistent electronic energy bands of zinc blende CdS are reported within the local density functional approximation (LDA). Our first principle, non-relativistic and ground state calculations employed a local density…

Materials Science · Physics 2012-03-23 C. E. Ekuma , L. Franklin , G. L. Zhao , J. T. Wang , D. Bagayoko

Using a novel self-consistent implementation of Hedin's GW perturbation theory we calculate space and energy dependent self-energy for a number of materials. We find it to be local in real space and rapidly convergent on second-- to third--…

Strongly Correlated Electrons · Physics 2012-04-11 N. E. Zein , S. Y. Savrasov , G. Kotliar

Recently, new FeAs based high-temperature superconductors CaAFe4As4 (A=K, Rb, Cs) with a layered tetragonal crystal structure were synthesized (TC ~ 30 K). In this Letter, we report for the first time the band structures, Fermi surface…

Superconductivity · Physics 2017-06-09 D. V. Suetin , I. R. Shein

Using the local spin-density approximation (LSDA) and the (non self-consistent) GW approach, the (quasi-particle) band structure is calculated for MnTe in zinc-blende geometry. Different parameters characterizing the electronic structure…

Strongly Correlated Electrons · Physics 2015-05-13 A. Fleszar , M. Potthoff , W. Hanke

Accurate low-order structure factors (Fg) measured by quantitative convergent beam electron diffraction (QCBED) were used for validation of different density functional theory (DFT) approximations. 23 low-order Fg were measured by QCBED for…

Materials Science · Physics 2013-02-26 Xiahan Sang , Andreas Kulovits , Guofeng Wang , Jorg Wiezorek

We assess the accuracy of vibrational damping rates of diatomic adsorbates on metal surfaces as calculated within the local-density friction approximation (LDFA). An atoms-in-molecules (AIM) type charge partitioning scheme accounts for…

Materials Science · Physics 2016-10-17 Simon P. Rittmeyer , Jörg Meyer , J. Iñaki Juaristi , Karsten Reuter

The GW approximation for the electronic self-energy is an important tool for the quantitative prediction of excited states in solids, but its mathematical exploration is hampered by the fact that it must, in general, be evaluated…

Materials Science · Physics 2013-02-27 Arno Schindlmayr

We theoretically study the energy and optical absorption spectra of alternating twist multilayer graphene (ATMG) under a perpendicular electric field. We obtain analytically the low-energy effective Hamiltonian of ATMG up to pentalayer in…

Mesoscale and Nanoscale Physics · Physics 2024-06-28 Kyungjin Shin , Yunsu Jang , Jiseon Shin , Jeil Jung , Hongki Min

Theoretical calculations based on density functional theory have made significant contributions to our understanding of metal oxides, their surfaces, and the binding of molecules at these surfaces. In this paper we investigate the binding…

Materials Science · Physics 2007-05-23 Oyvind Borck , Elsebeth Schroder

It is demonstrated that the electric dipole layer due to the overlapping of electron wavefunctions at metal/graphene contact results in negative Fermi-level pinning effect on the region of GaAs surface with low interface-trap density in…

Mesoscale and Nanoscale Physics · Physics 2022-08-18 Hoon Hahn Yoon , Wonho Song , Sungchul Jung , Junhyung Kim , Kyuhyung Mo , Gahyun Choi , Hu Young Jeong , Jong Hoon Lee , Kibog Park

For ethylene carbonate on the (100) surface of lithium, we calculate the adsorption energy in two binding motifs as well as the barrier height for a ring-opening decomposition reaction. We validate a scheme for producing results in the…

A method for calculating the electronic levels in the compact superheavy nuclear quasi-molecules, based on solving the two-center Dirac equation using the multipole expansion of two-center potential, is developed. For the internuclear…

Atomic Physics · Physics 2018-01-18 A. A. Roenko , K. A. Sveshnikov

Strong field photoemission and electron recollision provide a viable route to extract electronic and nuclear dynamics from molecular targets with attosecond temporal resolution. However, since an {\em ab-initio} treatment of even the…

Atomic Physics · Physics 2016-11-02 N. Suárez , A. Chacón , M. F. Ciappina , B. Wolter , J. Biegert , M. Lewenstein