Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Nicole A, Benedek"'
Publikováno v:
Physical Review X, Vol 11, Iss 2, p 021067 (2021)
The Raman effect, inelastic scattering of light by lattice vibrations (phonons), produces an optical response closely tied to a material’s crystal structure. Here we show that resonant optical excitation of IR and Raman phonons gives rise to a Rama
Externí odkaz:
https://doaj.org/article/09b2cf485a8345089abef61779d0c246
Autor:
Nicole A. Benedek, Michael A. Hayward
Publikováno v:
Annual Review of Materials Research. 52:331-355
We review the theoretical, computational, and synthetic literature on hybrid improper ferroelectricity in layered perovskite oxides. Different ferroelectric mechanisms are described and compared, and their elucidation using theory and first-principle
Autor:
Michael A. Hayward, P. Shiv Halasyamani, Subhadip Mallick, Weiguo Zhang, Alexandra S. Gibbs, Nicole A. Benedek
Publikováno v:
Chemistry of Materials. 32:7965-7972
Na-for-Rb cation exchange followed by K-for-Na cation exchange of RbNdM2O7 (M = Nb, Ta) yields the corresponding, metastable KNdM2O7 phases. Synchrotron X-ray and neutron powder diffraction data, combined with powder SHG data, reveal that the KNdM2O7
Publikováno v:
Chemistry of Materials. 32:4340-4346
Recently, there has been much interest in hybrid improper ferroelectrics materials that adopt polar, ferroelectric structures due to a complex tilting and twisting of the MO6 octahedra which constitute perovskite and related structures. Using a combi
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
Raman scattering via ionic dipoles is a forgotten pathway that produces giant optical nonlinearities in crystals when a field is IR resonant, offering ultrafast control of optical symmetry and constants from THz to visible frequencies.
Publikováno v:
The International Conference on Ultrafast Phenomena (UP) 2022.
We predict a new pathway for ultrafast coherent control of fully symmetric Raman phonons, allowing manipulation of sign, magnitude, and temporal response, enabled by the nonlinear lattice polarizability and a two-terahertz-pulse excitation sequence.
Autor:
Michael A. Hayward, Guru Khalsa, Subhadip Mallick, Maria Batuk, Joke Hadermann, Alexandra S. Gibbs, Jeffrey Z Kaaret, Weiguo Zhang, P. Shiv Halasyamani, Nicole A. Benedek
Solid state compounds which exhibit non-centrosymmetric crystal structures are of great interest due to the physical properties they can exhibit. The ‘hybrid improper’ mechanism – in which two non-polar distortion modes couple to, and stabilize
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69b8a4b0a3628a1b38a793d2be92f552
https://ora.ox.ac.uk/objects/uuid:fa8b2e80-5093-4799-8311-3b317f764eaf
https://ora.ox.ac.uk/objects/uuid:fa8b2e80-5093-4799-8311-3b317f764eaf
Autor:
Subhadip, Mallick, Guru, Khalsa, Jeffrey Z, Kaaret, Weiguo, Zhang, Maria, Batuk, Alexandra S, Gibbs, Joke, Hadermann, P Shiv, Halasyamani, Nicole A, Benedek, Michael A, Hayward
Publikováno v:
Dalton transactions (Cambridge, England : 2003). 50(42)
Solid state compounds which exhibit non-centrosymmetric crystal structures are of great interest due to the physical properties they can exhibit. The 'hybrid improper' mechanism - in which two non-polar distortion modes couple to, and stabilize, a fu
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 34(3)
We use theory and first-principles calculations to investigate how structural changes induced by ultrafast optical excitation of infrared-active phonons change with hydrostatic pressure in LaAlO
Autor:
Nicole A. Benedek, Kevin Olsson, Martin Rodriguez-Vega, Guru Khalsa, Bin Fang, Gregory A. Fiete, Xiaoqin Li, Jiaming He, Jeongheon Choe, Jianshi Zhou
Spin-phonon interaction is an important channel for spin and energy relaxation in magnetic insulators. Understanding this interaction is critical for developing magnetic insulator-based spintronic devices. Quantifying this interaction in yttrium iron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd8ce6950137bc0677eef2b89195dd84