Results 71 to 80 of about 18,009 (224)

Decoding THz‐Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks

Advanced Materials, EarlyView.
ABSTRACT Ultrafast polarization dynamics in ferroelectrics are of considerable interest for high‐speed tunable dielectrics and electro‐optics. Extended domain wall networks formed in ferroelectric twin nanodomains can support collective dynamics in the terahertz regime but require techniques that track polarization and strain evolution driven by ...
Xiaojiang Li, Aiden Ross, Vladimir A. Stoica, Sujit Das, Sankalpa Hazra, Huaiyu (Hugo) Wang, Hari Padma, Matthias C. Hoffmann, Patrick Kramer, Sanghoon Song, Silke Nelson, Takahiro Sato, Diling Zhu, Ramamoorthy Ramesh, Lane W. Martin, Yue Cao, John W. Freeland, Aaron M. Lindenberg, Haidan Wen, Long‐Qing Chen, Venkatraman Gopalan   +20 more
wiley   +1 more source

A first principles investigation on the mechanism of TiC act as heterogeneous nucleation substrate of Mg phase to refine grains in AZ91

AIP Advances, 2019
The lattice misfit of small Miller indices crystal faces between Mg and TiC is calculated based on Bramfitt two-dimensional lattice misfit theory.
T. Y. Tan, J. Li, S. Y. Gao
doaj   +1 more source

The Observation of Formation and Annihilation of Solitons and Standing Strain Wave Superstructures in a Two-Dimensional Colloidal Crystal [PDF]

, 2009
Confining a colloidal crystal within a long narrow channel produced by two parallel walls can be used to impose a meso-scale superstructure of a predominantly mechanical elastic character [Chui et al., EPL 2008, 83, 58004]. When the crystal is compressed
Binder K., Hansen J. P., Ian K. Snook, Kurt Binder, Landau D. P., Snook I. K., Snook I. K., Snook I. K., Surajit Sengupta, Yu-Hang Chui   +9 more
core   +2 more sources

Exploring the Potential of Microwave Annealing for Enhancing Si‐based GeSn Lasers

Advanced Materials Technologies, EarlyView.
We explore low‐thermal‐budget microwave annealing to enhance the performance of group‐IV GeSn lasers on Si. Microwave annealing under optimal conditions can simultaneously relax unwanted compressive strain and enhance the material quality of the GeSn active layer, thereby reducing the threshold and increasing the laser operating temperature.
Yue‐Tong Jheng, Cheng‐Feng Liu, Ruei‐Jhang Wang, Yu Cheng, Lung‐Yi Hsu, Yonder Berencén, Shengqiang Zhou, Hanh Thi‐Thu Tran, Guo‐En Chang   +8 more
wiley   +1 more source

Modelling of Phase Separation in Alloys with Coherent Elastic Misfit

, 1998
Elastic interactions arising from a difference of lattice spacing between two coherent phases can have a strong influence on the phase separation (coarsening) of alloys.
Fratzl, P., Lebowitz, J. L., Penrose, O.
core   +2 more sources

Microscale Mapping of Fiber Strain and Damage in Composite Wrinkled Laminates Using Computed Tomography Assisted Wide‐Angle X‐Ray Scattering

Advanced Science, EarlyView.
This study combines full‐field tomography with diffraction mapping to quantify radial (ε002$\varepsilon _{002}$) and axial (ε100$\varepsilon _{100}$) lattice strain in wrinkled carbon‐fiber specimens for the first time. Radial microstrain gradients (−14.5 µεMPa$\varepsilon \mathrm{MPa}$−1) are found to signal damage‐prone zones ahead of failure, which ...
Hoang Minh Luong, James Trevarthen, Igor Dolbnya, Wadwan Singhapong, Nicholas Pilato, Richard Butler, Jiraphant Srisuriyachot, Alexander J. G. Lunt   +7 more
wiley   +1 more source

Misfit-dependent interaction mechanisms between γ-phase dislocations and interfacial dislocation networks in nickel-based single crystal superalloys under [001] tensile loading

Materials & Design
Understanding the dislocation–interface interaction mechanisms at atomic-scale is crucial for improving the temperature capacity of Ni-based single-crystal superalloys.
Yifeng Xing, Wenyue Zhao, Wanxin Yu, Yi Ru, Shan Li, Bin Gan, Shengkai Gong, Huibin Xu   +7 more
doaj   +1 more source

Modeling of stresses and electric fields in piezoelectric multilayer: Application to multi quantum wells

AIP Advances, 2017
Exact closed-form expressions have been derived for the stresses and the electric fields induced in piezoelectric multilayers deposited on a substrate with lattice misfit and thermal expansion coefficient mismatch.
Dhaneshwar Mishra, Soong Hyeong Lee, Youjung Seo, Y. Eugene Pak   +3 more
doaj   +1 more source

Temperature-Dependent Accommodation of Two Lattices of Largely Different Size during Growth

Nanomaterials, 2019
If a material grows on another material with a largely different lattice constant, which of the two adapts for an energetically favorable growth? To tackle this question, we investigate the growth of Ag on Cu(111) by variable temperature scanning ...
Carsten Sprodowski, Karina Morgenstern
doaj   +1 more source

Phenomenological theory of phase transitions in epitaxial BaxSr(1-x)TiO3 thin films

, 2009
A phenomenological thermodynamic theory of BaxSr(1-x)TiO3 (BST-x) thin films epitaxially grown on cubic substrates is developed using the Landau-Devonshire approach. The eighth-order thermodynamic potential for BT single crystal and modified fourth-order
B. Dkhil, L. D. Landau, M. A. Krivoglaz, S. B. Desu, V. B. Shirokov, V. B. Shirokov, V. B. Shirokov, V. B. Shirokov, V. V. Lemanov, Yu. I. Yuzyuk   +9 more
core   +3 more sources