نتایج جستجو برای: epitaxy

تعداد نتایج: 8455  

2010
J. J. M. Law E. T. Yu G. Koblmüller F. Wu J. S. Speck

Conductive atomic force microscopy, scanning electron microscopy, and x-ray diffraction were used to determine the effects of Ga/N flux ratio on the conductivity of current leakage paths in GaN grown by molecular beam epitaxy. Our data reveal a band of fluxes near Ga /N 1 for which these pathways ceased to be observable. We conclude that changes in surface defects surrounding or impurities alon...

Journal: :Advanced materials 2016
Hui Cai Emmanuel Soignard Can Ataca Bin Chen Changhyun Ko Toshihiro Aoki Anupum Pant Xiuqing Meng Shengxue Yang Jeffrey Grossman Frank D Ogletree Sefaattin Tongay

Atomically thin quasi-2D GaSe flakes are synthesized via van der Waals (vdW) epitaxy on a polar Si (111) surface. The bandgap is continuously tuned from its commonly accepted value at 620 down to the 700 nm range, only attained previously by alloying Te into GaSe (GaSex Te1- x ). This is accomplished by manipulating various vdW epitaxy kinetic factors, which allows the choice bet ween screw-dis...

2014
Zhi Zhang Zhen-Yu Lu Ping-Ping Chen Hong-Yi Xu Ya-Nan Guo Zhi-Ming Liao Sui-Xing Shi Wei Lu Jin Zou

Journal: :Journal of the Korean Physical Society 2023

Atomic-scale precision epitaxy of perovskite oxide superlattices provides unique opportunities for controlling the correlated electronic structures, activating effective control knobs intriguing functionalities including electromagnetic, thermoelectric, and electrocatalytic behaviors. In this study, we investigated close interplay between atomic structures synthesized by atomic-scale epitaxy. p...

Journal: :Journal of Applied Physics 2023

The misfit dislocation formation related to plastic strain relaxation in Si or Ge quantum well layers SiGe heterostructures for spin qubits tends negatively affect the qubit behaviors. Therefore, it is essential understand and then suppress order achieve high-performance qubits. In this work, we studied propagation kinetics interactions by annealing strained grown molecular beam epitaxy. temper...

2015
J. Oila J. Kivioja V. Ranki K. Saarinen David C. Look Richard J. Molnar S. S. Park S. K. Lee J. Y. Han R. J. Molnar

Journal: :Optics express 2013
Elizabeth H Edwards Leon Lever Edward T Fei Theodore I Kamins Zoran Ikonic James S Harris Robert W Kelsall David A B Miller

We demonstrate electroabsorption contrast greater than 5 dB over the entire telecommunication S- and C-bands with only 1V drive using a new Ge/SiGe QW epitaxy design approach; further, this is demonstrated with the thinnest Ge/SiGe epitaxy to date, using a virtual substrate only 320-nm-thick. We use an eigenmode expansion method to model the optical coupling between SOI waveguides and both vert...

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