Results 101 to 110 of about 118,204 (269)

The Effects of Post-Thermal Annealing on the Emission Spectra of GaAs/AlGaAs Quantum Dots grown by Droplet Epitaxy

, 2012
We fabricated GaAs/AlGaAs quantum dots by droplet epitaxy method, and obtained the geometries of the dots from scanning transmission electron microscopy data. Post-thermal annealing is essential for the optical activation of quantum dots grown by droplet
Choi, Ha, Keizer, Koguchi, Mano, Mano, Mantovani, Moon, Moon, Park, Pomraeke, Sanguinetti, Wu, Wu, Wu, Wu, Yamagiwa, Zhuang   +17 more
core   +1 more source

Omnipolar Magnetic Field Detection by Superlattice‐Based Hall Sensor

Advanced Functional Materials, EarlyView.
Magnetic‐field‐induced electronic switching is demonstrated in unit‐cell‐engineered La0.7Sr0.3MnO3–BiFeO3 superlattices. Distinct substrate terminations modify magnetic and transport properties. Hall resistance measurements show omnipolar, hysteretic anomalous Hall switching above the Curie temperature, arising from Fe─Mn interfacial exchange, enabling
Mark Huijben, Nicolas Gauquelin, Arno Annys, Zhaoliang Liao, Jo Verbeeck, Guus Rijnders, Gertjan Koster   +6 more
wiley   +1 more source

Furan‐Substituted Phosphine‐Oxide as an Efficient Interfacial Modifier for Wide‐Bandgap Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
We report phosphine‐oxide interlayers for wide‐bandgap perovskite solar cells, in which tuned P = O Lewis basicity enables selective passivation of buried NiOx/perovskite interfaces and introduces interfacial dipoles that strengthen the built‐in field.
JeeHee Hong, Juan Anthony Prayogo, Soobin Heo, Jae Sung Yun, Dong Ryeol Whang, Dong Wook Chang, Hui Joon Park   +6 more
wiley   +1 more source

Low-temperature illumination and annealing of ultra-high quality quantum wells

, 2014
The effects of low temperature illumination and annealing on fractional quantum Hall (FQH) characteristics of a GaAs/AlGaAs quantum well are investigated. Illumination alone, below 1 K, decreases the density of the 2DEG electrons by more than an order of
Folk, Joshua A., Gardner, Geoffrey C., Lüscher, Silvia, Manfra, Michael J., Rossokhaty, Alexander V., Sajadi, Ebrahim, Samani, Mohammad, Watson, John D.   +7 more
core   +1 more source

Atomic Layer Deposition in Transistors and Monolithic 3D Integration

Advanced Functional Materials, EarlyView.
Transistors are fundamental building blocks of modern electronics. This review summarizes recent progress in atomic layer deposition (ALD) for the synthesis of two‐dimensional (2D) metal oxides and transition‐metal dichalcogenides (TMDCs), with particular emphasis on their enabling role in monolithic three‐dimensional (M3D) integration for next ...
Yue Liu, Taoyu Zou, Cheng‐Yan Xu, Liang Zhen, Yang Li, Yong‐Young Noh   +5 more
wiley   +1 more source

Polymer Network Modified Perovskite for High‐Performance Pure Blue Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
A polymer network of poly(4‐vinylphenol) (PVPh) is introduced to improve pure blue perovskite light‐emitting diodes. PVPh effectively passivates defects, enhances film morphology, reduces lattice strain, and suppresses ion migration. These effects lead to record device performance, achieving 9.82% external quantum efficiency and stable blue emission at
Zhongkai Yu, Jiawei Hong, Jiaxin Song, Zihao Ren, Ke Zhou, Shengnan Liu, Minhui Yu, Yue Xu, Minjeong Ha, Yongbin Hua, Baodan Zhao, Bo Ram Lee   +11 more
wiley   +1 more source

Dynamical frustration in ANNNI model and annealing

, 2005
Zero temperature quench in the Axial Next Nearest Neighbour Ising (ANNNI) model fails to bring it to its ground state for a certain range of values of the frustration parameter $\kappa$, the ratio of the next nearest neighbour antiferromagnetic ...
A. J. Bray, B. Derrida, C. M. Newman, C. P. Herrero, D. A. Huse, D. Boyer, D. Stauffer, G. E. Santoro, H. Hong, J. Y. Zhu, M. Suzuki, N. R. da Silva, O. Haggstrom, P. L. Krapivsky, P. M. Gleiser, P. Sen, P. Svenson, P. Svenson, S. Jain, S. N. Majumdar, S. Redner, T. Kadawoki, W. Selke   +22 more
core   +1 more source

Cross‐Layer Molecular Design for Coherent Interface Passivation in Rigid and Flexible Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
A cross‐layer passivation strategy employing molecularly designed thiazol‐5‐ylmethanamine hydrochloride (TMACl) enables coherent defect regulation at the SnO2/perovskite interface, stabilizes both layers, promotes phase‐pure α‐FAPbI3 formation, and enhances charge extraction, delivering PCEs of 26.44% in rigid and 24.72% in flexible perovskite solar ...
Fan Shen, Chenxu Zhao, Lianghui Li, Jia Xu, Jiale Chen, Xunhui Wang, Huijing Liu, Pengchen Zou, Xuewei Liu, Yao Fu, Huifang Han, Kun Lang, Yijun Wang, Yahan Wu, Xu Pan, Zhaofu Fei, Jianxi Yao   +16 more
wiley   +1 more source

Quantum-enhanced reinforcement learning for finite-episode games with discrete state spaces

, 2017
Quantum annealing algorithms belong to the class of metaheuristic tools, applicable for solving binary optimization problems. Hardware implementations of quantum annealing, such as the quantum annealing machines produced by D-Wave Systems, have been ...
Compostella, Gabriele, Neukart, Florian, Seidel, Christian, Von Dollen, David   +3 more
core   +2 more sources

Fast Track to the Overdoped Regime of Superconducting YBa2Cu3O7‐δ Thin Films via Electrochemical Oxidation

Advanced Functional Materials, EarlyView.
Overdoping high temperature superconductors, such as YBa2Cu3O7‐δ (YBCO), is expected to maxime the critical current density by optimising the condensation energy for a given defect landscape, providing new thrust for the development of fusion enabling coated conductors. Here, precise oxygen control is achieved via an electrochemical method allowing for
Alexander Stangl, Aiswarya Kethamkuzhi, Hervé Roussel, Cornelia Pop, Xavier Obradors, Teresa Puig, Mónica Burriel, Arnaud Badel   +7 more
wiley   +1 more source