Results 21 to 30 of about 4,168 (159)

Valley Coherent Hot Carriers and Thermal Relaxation in Monolayer Transition Metal Dichalcogenides

, 2016
We show room temperature valley coherence with in MoS2, MoSe2, WS2 and WSe2 monolayers using linear polarization resolved hot photoluminescence (PL), at energies close to the excitation - demonstrating preservation of valley coherence before sufficient ...
Kallatt, Sangeeth, Majumdar, Kausik, Umesh, Govindarao   +2 more
core   +2 more sources

Dispersion‐compensated Rowland spectrometer: implications for uranium VB‐RIXS

Journal of Synchrotron Radiation, Volume 33, Issue 1, Page 218-226, January 2026.
A valence‐band resonant inelastic X‐ray scattering instrument, operating in the tender X‐ray range, uses an incoming beam with a linear energy dispersion to reach the intrinsic resolution of the Rowland spectrometer. Such a scheme is insensitive to the incident bandwidth and therefore preserves count‐rates despite the higher resolution.The total energy
Martin Sundermann, Manuel Harder, Ayman H. Said, Bernhard Keimer, Hlynur Gretarsson   +4 more
wiley   +1 more source

Indiscernibles in monadically NIP theories

Bulletin of the London Mathematical Society, Volume 57, Issue 11, Page 3326-3345, November 2025.
Abstract We prove various results around indiscernibles in monadically NIP theories. First, we provide several characterizations of monadic NIP in terms of indiscernibles, mirroring previous characterizations in terms of the behavior of finite satisfiability. Second, we study (monadic) distality in hereditary classes and complete theories.
Samuel Braunfeld, Michael C. Laskowski
wiley   +1 more source

Locally finite groups with all subgroups either subnormal or nilpotent-by-Chernikov

Open Mathematics, 2012
Abstract Let G be a locally finite group satisfying the condition given in the title and suppose that G is not nilpotent-by-Chernikov. It is shown that G has a section S that is not nilpotent-by-Chernikov, where S is either a p-group or a semi-direct product of the additive group A of a locally finite field F by a subgroup K of the ...
CUTOLO, GIOVANNI, H. Smith
openaire   +9 more sources

Narrow‐Linewidth Emission and Weak Exciton‐Phonon Coupling in 2D Layered Germanium Halide Perovskites

Advanced Materials, Volume 37, Issue 27, July 10, 2025.
The structural and photophysical properties of the 2D layered metal halides (4F‐PMA)2GeI4 and (4F‐PMA)2PbI4 are reported. For the Ge composition, reduced exciton‐phonon coupling is found and the absence of bound‐exciton emission, present for the Pb composition.
Zachary A. VanOrman, Benjamin Savinson, Tejas Deshpande, Isaiah W. Gilley, Rosario Scopelliti, Antti‐Pekka M. Reponen, Mercouri G. Kanatzidis, Edward H. Sargent, Oleksandr Voznyy, Sascha Feldmann   +9 more
wiley   +1 more source

Groups with boundedly Černikov conjugacy classes

Advances in Group Theory and Applications, 2021
Summary: A relevant theorem of B. H. Neumann states that if a group \(G\) has boundedly finite conjugacy classes, then its commutator subgroup \(G'\) is finite. This result has been generalized in [\textit{E. Detomi} et al., Glasg. Math. J. 63, No. 1, 54--58 (2021; Zbl 1530.20084)], where it is proved in particular that if the orbits of a group \(G ...
M. De Falco, G. Fernandez Alcober, F. de Giovanni, C. Musella   +3 more
openaire   +4 more sources

Dispersive X‐ray absorption spectroscopy using independent grazing‐incidence focusing and convexly bent Bragg‐crystal dispersing optics

Journal of Synchrotron Radiation, Volume 32, Issue 4, Page 1068-1084, July 2025.
A dispersive X‐ray absorption spectroscopy instrument has been developed and implemented at the Advanced Photon Source's Advanced Spectroscopy Beamline. The instrument uses a convexly bent Bragg‐crystal analyzer to disperse a polychromatic X‐ray beam and independent Kirkpatrick–Baez mirrors for focusing, thereby providing a simple and flexible method ...
Juanjuan Huang, Adam P. Tornheim, Xianbo Shi, Mark Wolfman, Yanna Chen, Steve M. Heald, Shelly D. Kelly, George E. Sterbinsky   +7 more
wiley   +1 more source

A graviton propagator for inflation

, 2007
We construct the scalar and graviton propagator in quasi de Sitter space up to first order in the slow roll parameter $\epsilon\equiv -\dot{H}/H^2$. After a rescaling, the propagators are similar to those in de Sitter space with an $\epsilon$ correction ...
Abramo L R W Brandenberger R H Mukhanov V F M Olinto A V Frieman J A Schramm D N, Birrell N D, Brunier T, Carroll S M, Chernikov N A, Danielsson U H, Grishchuk L P, Grishchuk L P, Higuchi A, Janssen T, Kaloper N, Liddle A R, Miao S P, Mukhanov V, Mukhanov V F, Mukhanov V F, Onemli V K, Penrose R, Prokopec T, Prokopec T Janssen T, Prokopec T Tsamis N C Woodard R P, Starobinsky A A, Starobinsky A A, Tomas Janssen, Tomislav Prokopec, Tsamis N C Woodard R P, Woodard R P, Woodard R P   +27 more
core   +1 more source

Oxidative Assemblies of Flavonoids (Quercetin, Morin) to Form Dimer in Weak Base Circumstances and Its Mechanism Analysis by UPLC‐ESI‐TSQ‐MS/MS

Food Chemistry International, Volume 1, Issue 2, Page 167-182, June 2025.
Product identification of flavonoids under weak base conditions and mechanism analysis of dimer formation by the oxidative assembly of quercetin and morin, respectively. ABSTRACT Flavonoids are susceptible to autoxidation in aqueous solutions, which is largely dependent on pH, generating various free radicals and oxidation products. Quercetin and morin
Pengren Zou, Susan Jyakhwo, Paz Otero, Shengxiong Chen, Celia Costas, Carla Cameselle, Fan Zhang, Hui Cao   +7 more
wiley   +1 more source

Excitonic States in Semiconducting Two-dimensional Perovskites

, 2018
Hybrid organic/inorganic perovskites have emerged as efficient semiconductor materials for applications in photovoltaic solar cells with conversion efficiency above 20 \%.
Molina-Sánchez, Alejandro
core   +2 more sources