Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Alexander Kvasov"'
Autor:
Alexander Kvasov, Leo J. McGilly, Jin Wang, Zhiyong Shi, Cosmin S. Sandu, Tomas Sluka, Alexander K. Tagantsev, Nava Setter
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016)
Recently, negative pressure has been observed in perovskite nanowires by annealing the wires from a lower-density phase. Here, the authors show that the negative pressure enhances the piezoelectric coefficient of PbTiO3 and Pb(Zr,Ti)O3 nanowires expe
Externí odkaz:
https://doaj.org/article/33a6be2c54d0463d94c279f39ef9e7ec
Autor:
Grigore Suruceanu, Tomas Kubes, Joel Comminot, Selman Ergunay, Alexander Kvasov, Gregoire Hirt, Tomas Sluka, Gregoire Smolik, Patrick Kabengera, Jonathan Masson, Alexandre Fotinos, Alexis Michoud
Publikováno v:
Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR) II.
The state-of-the-art Virtual and Augmented Reality (VR/AR) hardware fails to deliver satisfying visual experience due to missing or conflicting focus cues. The absence of natural focal depth in digital 3D imagery causes the so-called vergence-accommo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3dad73727f56d749e3253c05cfecae9d
https://doi.org/10.1117/12.2584091
https://doi.org/10.1117/12.2584091
Publikováno v:
Flexoelectricity in Solids: From Theory to Applications
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04dd1a075b8e8f89da0e93c8e88a5f92
https://doi.org/10.1142/9789814719322_0006
https://doi.org/10.1142/9789814719322_0006
Publikováno v:
Physical Review B. 94
In this work, using zero kelvin ab initio calculations, we revisit the structure and ferroelectric phase transition in antiphase domain boundaries (APBs) in SrTiO3 (STO), which has been previously addressed in terms of a phenomenological approach. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3c94bfd392da6ebcfd05d3dcceca5193
https://doi.org/10.1103/physrevb.94.054102
https://doi.org/10.1103/physrevb.94.054102
Publikováno v:
PHYSICAL REVIEW B
Using the dynamical matrix of a crystal obtained from ab initio calculations, we have evaluated for the first time the strength of the dynamic flexoelectric effect and found it comparable to that of the static bulk flexoelectric effect, in agreement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7856073398e7494faaa6692035624a08
Autor:
Alexander Usikov, Alexander Kvasov, Michael A. Reshchikov, T. McMullen, Vladimir A. Dmitriev, Vitali Soukhoveev, Marilyn F. Bishop
Publikováno v:
Physical Review B. 84
Tunable and abrupt thermal quenching of photoluminescence by increasing temperature has been observed for the blue band in high-resistivity Zn-doped GaN. The photoluminescence intensity dropped by several orders of magnitude within a few Kelvins, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3779544d1bb49860f4545c77b3bba234
https://doi.org/10.1103/physrevb.84.075212
https://doi.org/10.1103/physrevb.84.075212
Autor:
Alexander K. Tagantsev, Serguei Okhonin, Eugene S. Polzik, Alexander Kvasov, Maxim Gureev, Marc Pastre, Denis Sallin, Adil Koukab, Maher Kayal, Jürgen Appel, F. Uddegard
Publikováno v:
Applied Physics Letters
Traditionally, photodiodes operate at static reverse bias, and incident light intensity is obtained from the relatively week photocurrent. In this paper, we introduce a different concept of photodiode function: the photodiode is used in a dynamic reg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbdf5915ef4352534919ba257f5c047b
Publikováno v:
Journal of Applied Physics. 113:204104
Being important for the antiresonance frequency tuning of tunable thin Film Bulk Acoustic wave Resonators (FBARs), the non-linear electrostrictive coefficient was for the first time calculated for BaTiO3 and SrTiO3 using ab initio methods. Further, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bdcf1221e12934fb17775bd32a915b2
https://doi.org/10.1063/1.4807648
https://doi.org/10.1063/1.4807648
Publikováno v:
2021 International Conference on Visual Communications and Image Processing (VCIP)
IEEE International Conference on Visual Communications and Image Processing, VCIP 2021
IEEE International Conference on Visual Communications and Image Processing, VCIP 2021
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98b8102b4fe0f64289932af9aa7d9269
Publikováno v:
Physical Review B-Condensed Matter and Materials Physics
Currently used methods for the description of thermodynamics of ferroelectric thin films (Landau theory or ab initio based Monte Carlo simulations) are based on an energy expansion in terms of internal degrees of freedom. It was shown that these meth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c24a9c7c4bacdf8e04508d394b7badfc
https://infoscience.epfl.ch/record/189127
https://infoscience.epfl.ch/record/189127