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The effective elasticity of highly charged stiff polyelectrolytes is studied in the presence of counterions, with and without added salt. The rigid polymer conformations may become unstable due to an effective attraction induced by…

软凝聚态物质 · 物理学 2009-11-07 Ramin Golestanian , Tanniemola B. Liverpool

We developed a theory of electric and thermoelectric conductivity of lightly doped SrTiO$_3$ in the non-degenerate region $k_B T \geq E_F$, assuming that the major source of electron scattering is their interaction with soft transverse…

其他凝聚态物理 · 物理学 2021-09-15 Kh. G. Nazaryan , M. V. Feigelman

The interplay of electronic and structural degrees of freedom in solids is a topic of intense research. Experience and intuition suggest that structural changes drive conduction electron behavior, because the large number of valence…

Surface sensitive synchrotron x-ray scattering studies were performed to obtain the distribution of monovalent ions next to a highly charged interface. A lipid phosphate (dihexadecyl hydrogen-phosphate) was spread as a monolayer at the…

软凝聚态物质 · 物理学 2007-05-23 Wei Bu , David Vaknin , Alex Travesset

Density functional theory (DFT) calculations are used to investigate the electronic and magnetic structures of a two-dimensional (2D) monolayer Li$_{2}$N. It is shown that bulk Li$_{3}$N is a non-magnetic semiconductor. The…

材料科学 · 物理学 2017-12-06 Gul Rahman , Altaf Ur Rahman , Saima Kanwal , P. Kratzer

The adiabatic connection of density functional theory (DFT) for electronic systems is generalized here to negative values of the coupling strength $\alpha$ (with {\em attractive} electrons). In the extreme limit $\alpha\to-\infty$ a simple…

其他凝聚态物理 · 物理学 2015-05-14 Michael Seidl , Paola Gori-Giorgi

Counterion distribution around an isolated flexible polyelectrolyte in the presence of a divalent salt is evaluated using the adsorption model [M. Muthukumar, J. Chem. Phys. {\bf 120}, 9343 (2004)] that considers Bjerrum length, salt…

软凝聚态物质 · 物理学 2008-12-29 Arindam Kundagrami , M. Muthukumar

These brief comments on the article in Phys. Rev. B 93, 155116 (2016), address an inadvertent misrepresentation of the capabilities of density functional theory (DFT) and of its local density approximation (LDA) in describing electronic and…

材料科学 · 物理学 2016-10-18 Diola Bagayoko , Yacouba Issa Diakité , Chinedu E. Ekuma , Lashounda Franklin

We present a general multi-component density functional theory in which electrons and nuclei are treated completely quantum mechanically, without the use of a Born-Oppenheimer approximation. The two fundamental quantities in terms of which…

材料科学 · 物理学 2007-05-23 Thomas Kreibich , Robert van Leeuwen , E. K. U. Gross

Studies of the thermodynamics of complex coacervation of pairs of symmetric, strongly ionizable, oppositely charged polyelectrolyte chains are abundant. To generalize such understanding to asymmetric chain lengths and variable ionizability…

软凝聚态物质 · 物理学 2023-06-07 Souradeep Ghosh , Soumik Mitra , Arindam Kundagrami

Energy transfer processes from a high-intensity ultrashort laser pulse to electrons in simple dielectrics, silicon, diamond, and $\alpha$-quartz are theoretically investigated by first-principles calculations based on time-dependent density…

光学 · 物理学 2019-05-22 Atsushi Yamada , Kazuhiro Yabana

We use a version of the density functional theory to study the solvation force between two plates modified with a tethered layer of chains. The chains are built of tangentially jointed charged spherical segments. The plates are immersed in…

软凝聚态物质 · 物理学 2012-10-09 O. Pizio , A. Patrykiejew , S. Sokołowski , J. M. Ilnytskyi

The line tension of an electrolyte wetting a non-polar substrate is computed analytically and numerically. The results show that, depending on the value of the apparent contact angle, positive or negative line tension values may be…

化学物理 · 物理学 2014-11-06 Aaron Dörr , Steffen Hardt

Combining classical electrodynamics and density functional theory (DFT) calculations, we develop a general and rigorous theoretical framework that describes the energetics of metal surfaces under high electric fields. We show that the…

材料科学 · 物理学 2019-05-22 Andreas Kyritsakis , Ekaterina Baibuz , Ville Jansson , Flyura Djurabekova

Organic molecular ferroelectrics, including organic proton-transfer ferroelectrics and antiferroelectrics, are potentially attractive in organic electronics and have significant chemical tunability. Among these, acid-base proton transfer…

材料科学 · 物理学 2024-10-29 Seyedmojtaba Seyedraoufi , Graeme M. Day , Kristian Berland

The electronic energy structures and magnetic properties of layered superconductors $R$Ni$_2$B$_2$C, $R$Fe$_4$Al$_8$ and FeSe are systematically studied, by using the density functional theory (DFT). The calculations allowed us to reveal a…

超导电性 · 物理学 2014-04-04 G. E. Grechnev , A. V. Logosha , A. A. Lyogenkaya , A. G. Grechnev , A. V. Fedorchenko

To examine the applicability of the time-dependent density-functional theory (TDDFT) for treating the electron-nucleus coupling in excited states, we calculate the strength distribution associated with the pi-pi* transition in ethylene. The…

化学物理 · 物理学 2007-05-23 G. F. Bertsch , J. Giansiracusa , K. Yabana

The ionization energy theory is used to calculate the evolution of the resistivity and specific heat curves with respect to different doping elements in the recently discovered superconducting Pnictide materials. Subsequently, the…

超导电性 · 物理学 2009-11-05 Andrew Das Arulsamy , Kostya "Ken" Ostrikov

The persistence length of a single, intrinsically rigid polyelectrolyte chain, above the Manning condensation threshold is investigated theoretically in presence of added salt. Using a loop expansion method, the partition function is…

统计力学 · 物理学 2009-11-07 Gil Ariel , David Andelman

We demonstrate the capabilities of time-dependent density functional theory (TDDFT) for strong-field, short wavelength (soft X-ray) physics, as compared to a formalism based on rate equations. We find that TDDFT provides a very good…