Results 61 to 70 of about 504,986 (312)

Ultrafast Superradiant Scintillation from Isolated Weakly Confined Perovskite Nanocrystals

Advanced Materials, EarlyView.
Efficiency and scintillation velocity are critical for high‐energy and medical physics. These parameters, typically conflicting in conventional scintillators, are simultaneously optimized by exploiting the giant oscillator strength of CsPbBr3 nanocrystals, leading to radiatively accelerated (multi)excitonic emission with unity efficiency without ...
Matteo L. Zaffalon, Andrea Fratelli, Zhanzhao Li, Francesco Bruni, Ihor Cherniukh, Francesco Carulli, Francesco Meinardi, Maksym V. Kovalenko, Liberato Manna, Sergio Brovelli   +9 more
wiley   +1 more source

Isomerism in Hexacoordinate Ti(IV) and Zr(IV) Complexes with a Tetradentate ONNO‐Schiff Base Ligand

European Journal of Inorganic Chemistry, Volume 2022, Issue 36, December 27, 2022., 2022
Group IV complexes with a tetradentate ONNO ligand L with a biphenyl backbone, derived from the Jacobsen ligand, show isomerism for [(L)TiCl2] whereas only one isomer has been observed for [(L)ZrCl2]. Quantum chemical calculations verify the different coordination behavior of this ligand at Ti and Zr ions.
Bahareh Rezaei Kheirkhah, Tareq M. A. Al‐Shboul, Felix Edwin Pröhl, Sven Krieck, Helmar Görls, Matthias Westerhausen   +5 more
wiley   +1 more source

Spatial confinement effects on quantum harmonic oscillator I: Nonlinear coherent state approach [PDF]

J. Phys. A: Math. Theor. 42, 045403 (2009), 2011
In this paper we study some basic quantum confinement effects through investigation of a deformed harmonic oscillator algebra. We show that spatial confinement effects on a quantum harmonic oscillator can be represented by a deformation function within the framework of nonlinear coherent states theory.
arxiv   +1 more source

Investigating Dopant Effects in ZnO as an Electron Transport Layer for Enhanced Efficiency in Organic Photovoltaics

Advanced Materials Interfaces, EarlyView.
By doping the elements with different numbers of valence electrons (Al3+ and Sn4+ ions) into the ZnO matrix, device conversion efficiencies of 8.69% and 9.21%, respectively, are achieved. The ultrafast time‐resolved studies show that the elevated carrier concentration in Sn‐doped ZnO, in comparison with Al‐doped ZnO and un‐doped ZnO, plays a ...
Anusha Puliparambil Thilakan, Pei‐Lun Hung, Jin‐Bin Yang, Ding‐Lun Lin, Shien‐Der Tzeng, Yu‐Kuei Hsu, Chih‐Hung Tsai, Yi‐Hao Pai, Atshushi Yabushita, Chih‐Wei Luo, Mei‐Hsin Chen   +10 more
wiley   +1 more source

A damped harmonic oscillator in the GUP framework

Iranian Journal of Physics Research, 2019
Harmonic oscillator is significantly important in quantum gravity for its dynamical properties. Dynamics of the harmonic oscillator can be modified by inserting a modified uncertainty relation considered in quantum cosmology models such as string theory ...
D Sadatian
doaj  

A MEMS Electromagnetic Vibration Energy Harvester with Monolithically Integrated NdFeB Micromagnets

Advanced Materials Technologies, EarlyView.
50µm thick sputtered arrays of NdFeB micromagnets are directly integrated into a functional MEMS in‐plane electromagnetic vibration energy harvester. A combination of analytical modeling and numerical simulations guided the design of the magnet arrays and ad‐hoc coil, to produce a high transduction factor.
Ilona Lecerf, José Elìas Angulo‐Cervera, Frederico Orlandini‐Keller, Pierre Moritz, Fabrice Mathieu, David Bourrier, Samuel Charlot, Liviu Nicu, Thierry Leïchlé, Thibaut Devillers, Richard Haettel, Nora M. Dempsey, Thomas Blon, Lise‐Marie Lacroix   +13 more
wiley   +1 more source

Geometrical benchmarking and analysis of redox potentials of copper(I/II) guanidine‐quinoline complexes: Comparison of semi‐empirical tight‐binding and DFT methods and the challenge of describing the entatic state (part III)

Journal of Computational Chemistry, Volume 44, Issue 3, Page 319-328, January 30, 2023., 2023
Geometrical Benchmarking and Analysis of Redox Potentials of Copper(I/II) Guanidine‐Quinoline Complexes: Comparison of semi‐empirical tight‐binding and DFT methods and the challenge of describing the entatic state (Part III). The geometry optimization and the calculation of the redox potential of five real‐life model complex pairs (up to 50 non ...
Lukas Raßpe‐Lange, Alexander Hoffmann, Christoph Gertig, Joshua Heck, Kai Leonhard, Sonja Herres‐Pawlis   +5 more
wiley   +1 more source

Quantum harmonic oscillators and thermalization

, 2021
We study a quantum harmonic oscillator undergoing thermalization. To describe the thermalization process, we generalize the Ermakov-Lewis-Riesenfeld (ELR) invariant method for the oscillator. After imposing appropriate conditions on the thermalization process, we introduce an ansatz equation that describes the time evolution effectively.
Kim, Hyeong-Chan, Lee, Youngone
openaire   +2 more sources

Derivation of quantum propagator for coupled harmonic oscillator with uniform electric field in a single harmonic oscillator environment using white noise functional approach

Journal of King Saud University: Science, 2019
The use of white noise analysis is utilized in this study. We consider an open quantum system of coupled harmonic oscillator with uniform two dimensional electric field in a single harmonic oscillator environment. We obtain the quantum propagator for the
Norodin A. Rangaig, Caironesa T. Pada-Dulpina, Vernie C. Convicto   +2 more
doaj  

Frequency‐Selective Terahertz Wave Amplification by a Time Boundary in Huygens' Metasurface

Advanced Optical Materials, EarlyView.
In a free‐standing all‐dielectric Huygens' metasurface, ultrafast pulsed laser excitation is used to establish the time boundary for a coherent modulation to the electric and magnetic polarizability in the adiabatic limit. Amplification of THz waves at frequencies that can be continuously tuned have been achieved, showing an effective energy gain up to
Fu Deng, Fengjie Zhu, Xiaoyue Zhou, Yi Chan, Jingbo Wu, Caihong Zhang, Biaobing Jin, Jensen Li, Kebin Fan, Jingdi Zhang   +9 more
wiley   +1 more source