Results 21 to 30 of about 195 (135)

Challenges and Opportunities for Layered Double Perovskite Solar Cells

Solar RRL, Volume 10, Issue 17, 15 September 2026.
Layered lead‐free double perovskites suffer from intrinsic and extrinsic limitations that hinder high photovoltaic performance. This review identifies key challenges, including unfavorable band structures, strong self‐trapping, defect‐induced recombination, processing‐induced inhomogeneity, and device‐level mismatches.
Krishnaiah Mokurala, Marija Mrkonjić, Ceylan Doyranli, Jovana V. Milić, Mohammad Reza Golobostanfard   +4 more
wiley   +1 more source

A first course in noncommutative rings

, 2001
A First Course in Noncommutative Rings, an outgrowth of the author's lectures at the University of California at Berkeley, is intended as a textbook for a one-semester course in basic ring theory. The material covered includes the Wedderburn-Artin theory
Lam, T Y, T. Y. Lam
core   +1 more source

Unitary groups with excellent S and entire E(u, L) [PDF]

, 1982
Unitary groups of Hermitian forms with a hyperbolic rank at least one over local rings have been studied by D. G. James (J. Algebra 52 (1978), 354–363).
Ishibashi, Hiroyuki
core   +1 more source

An exciting Approach to Theoretical Spectroscopy

Advanced Science, Volume 13, Issue 47, 24 August 2026.
ABSTRACT Theoretical spectroscopy, and more generally, electronic‐structure theory, are powerful concepts for describing the complex many‐body interactions in materials. They cover methods from ground‐state properties to lattice excitations and light‐matter interaction, including time‐resolved variants.
Martí Raya‐Moreno, Alexander Buccheri, Noah Alexy Dasch, Nasrin Farahani, Ignacio Gonzalez Oliva, Andris Gulans, Seokhyun Hong, Manoar Hossain, Hannah Kleine, Martin Kuban, Sven Lubeck, Benedikt Maurer, Pasquale Pavone, Fabian Peschel, Daria Popova‐Gorelova, Lu Qiao, Elias Richter, Santiago Rigamonti, Ronaldo Rodrigues Pela, Maximilian Schebek, Kshitij Sinha, Daniel T. Speckhard, Jan Stutz, Sebastian Tillack, Dmitry Tumakov, Jānis Užulis, Mara Voiculescu, Cecilia Vona, Mao Yang, Claudia Draxl   +29 more
wiley   +1 more source

Analysis of the magnetically induced current density of molecules consisting of annelated aromatic and antiaromatic hydrocarbon rings [PDF]

, 2016
Magnetically induced current susceptibilities and current pathways have been calculated for molecules consisting of two pentalene groups annelated with a benzene (1) or naphthalene (2) moiety.
Berger, Raphael J. F., Sundholm, Dage, Fliegl, Heike   +2 more
core   +1 more source

Universally Accurate or Specifically Inadequate? Stress‐Testing General Purpose Machine Learning Interatomic Potentials

Advanced Intelligent Discovery, Volume 2, Issue 4, August 2026.
We investigate MACE‐MP‐0 and M3GNet, two general‐purpose machine learning potentials, in materials discovery and find that both generally yield reliable predictions. At the same time, both potentials show a bias towards overstabilizing high energy metastable states. We deduce a metric to quantify when these potentials are safe to use.
Konstantin S. Jakob, Karsten Reuter, Johannes T. Margraf   +2 more
wiley   +1 more source

The Complete Quotient Ring of Images of Semilocal Prüfer Domains

, 1977
It is well known that the complete quotient ring of a Noetherian ring coincides with its classical quotient ring, as shown in Akiba [1]. But in general, the structure of the complete quotient ring of a given ring is largely unknown.
John Chuchel, Norman Eggert
core   +1 more source

Generalization of a theorem of Artin-Pfister to arbitrary semilocal rings, and related topics

Journal of Algebra, 1975
(*) with t = (tj in) running through all multi-indices with coordinates 0 or 1 and with coefficients c{ which are sums of squares. In the special case r = 1, ax = 1, this is Artin's well known theorem that totally positive elements are sums of squares [l,Satz 1], and in fact Pfister deduces his theorem from Artin's theorem.
openaire   +1 more source

Ab Initio Investigation of MgXe, Its Cation Mg+Xe and Clusters Mg+Xen: Electronic Structure, Spectroscopic Properties, and Temperature‐Dependent Absorption Spectra

International Journal of Quantum Chemistry, Volume 126, Issue 13, July 5, 2026.
Accurate potential energy curves, spectroscopic constants, and transition dipole moments were determined for the Mg+Xe and MgXe complexes. Spin–orbit effects were explicitly included for the Mg+Xe ionic system. Monte Carlo simulations were employed to investigate Mg+Xen clusters, and the temperature dependence of their absorption spectra was analyzed ...
M. Bejaoui, S. Awali, W. Zrafi, J. Dhiflaoui, H. Berriche   +4 more
wiley   +1 more source

Breaking Inversion Symmetry via Vanadium Coordination Engineering in Bismuth Vanadium Selenites

Small, Volume 22, Issue 40, 17 July 2026.
Vanadium coordination engineering induces symmetry breaking in bismuth selenites by transforming symmetry‐compensated VO6/VO5F units into directionally aligned VO5 polyhedra. The resulting non‐antiparallel vanadyl arrangement eliminates dipole cancellation and stabilizes a polar noncentrosymmetric framework with nonlinear optical activity.
Chanhee Ko, Congcong Jin, Taek Rim Kim, Seung Han Shin, Yunseung Kuk, Jiachen Lu, Chong‐An Chen, Wei Zeng, Joon Ik Jang, Kang Min Ok   +9 more
wiley   +1 more source