Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Gehring, Peter M."'
Autor:
Weadock, Nicholas J., Gehring, Peter M., Gold-Parker, Aryeh, Smith, Ian C., Karunadasa, Hemamala I., Toney, Michael F.
Publikováno v:
Phys. Rev. Lett. 125, 075701 (2020)
We investigate the hypothesis of dynamic tetragonal domains occuring in cubic CH$_3$NH$_3$PbI$_3$ using high-resolution neutron spectroscopy to study a fully deuterated single crystal. The $\textit{R}$-point scattering above the 327.5 K tetragonal-cu
Externí odkaz:
http://arxiv.org/abs/2005.09116
Autor:
Xu, Zhijun, Li, Fei, Zhang, Shujun, Stock, Christopher, Luo, Jun, Gehring, Peter M., Xu, Guangyong
Publikováno v:
Phys. Rev. B 100, 024113 (2019)
Short-range polar orders in the relaxor ferroelectric material PbMg$_{1/3}$Nb$_{2/3}$O$_3$-$28\%$PbTiO$_3$ (PMN-28PT) have been studied using neutron diffuse scattering. An external electric field along [110] direction can affect the diffuse scatteri
Externí odkaz:
http://arxiv.org/abs/1905.00965
Autor:
Weadock, Nicholas J., Sterling, Tyler C., Vigil, Julian A., Gold-Parker, Aryeh, Smith, Ian C., Ahammed, Ballal, Krogstad, Matthew J., Ye, Feng, Voneshen, David, Gehring, Peter M., Rappe, Andrew M., Steinrück, Hans-Georg, Ertekin, Elif, Karunadasa, Hemamala I., Reznik, Dmitry, Toney, Michael F.
Publikováno v:
In Joule 17 May 2023 7(5):1051-1066
Autor:
Gold-Parker, Aryeh, Gehring, Peter M., Skelton, Jonathan M., Smith, Ian C., Parshall, Dan, Frost, Jarvist M., Karunadasa, Hemamala I., Walsh, Aron, Toney, Michael F.
Publikováno v:
PNAS 115, 11905 (2018)
Hybrid organic-inorganic perovskites (HOIPs) have become an important class of semiconductors for solar cells and other optoelectronic applications. Electron-phonon coupling plays a critical role in all optoelectronic devices, and although the lattic
Externí odkaz:
http://arxiv.org/abs/1807.06679
Autor:
Xu, Zhijun, Schneeloch, J. A., Wen, Jinsheng, Matsuda, M., Pajerowski, D., Winn, B. L., Zhao, Yang, Stock, Christopher, Gehring, Peter M., Ushiyama, T., Yanagisawa, Y., Tomioka, Y., Ito, T., Gu, Genda, Birgeneau, R. J., Xu, Guangyong
We report the direct observation of a "resonance" mode in the lowest-energy optic phonon very near the zone center around (111) in the multiferroic BiFeO$_3$ using neutron scattering methods. The phonon scattering intensity is enhanced when antiferro
Externí odkaz:
http://arxiv.org/abs/1803.01041
Autor:
Xu, Zhijun, Wen, Jinsheng, Berlijn, Tom, Gehring, Peter M., Stock, Christopher, Stone, M. B., Ku, Wei, Gu, Genda, Shapiro, Stephen M., Birgeneau, R. J., Xu, Guangyong
The idea of embedding and transmitting information within the fluctuations of the magnetic moments of spins (spin waves) has been recently proposed and experimentally tested. The coherence of spin waves, which describes how well defined these excitat
Externí odkaz:
http://arxiv.org/abs/1207.5078
We report neutron inelastic scattering on single crystal 0.68Pb(Mg1/3Nb2/3O3)-0.32PbTiO3 (PMN-0.32PT), a relaxor ferroelectric material that lies within the compositional range of the morphotropic phase boundary (MPB). Data were obtained between 100
Externí odkaz:
http://arxiv.org/abs/0808.3532
Publikováno v:
J. Phys. Soc. Jpn. 73, 3413 (2004)
Soft phonons and diffuse scattering in insulating La$_{2-x}$Sr$_{x}$CuO$_4$ ($x=0.05$) have been studied by the neutron scattering technique. The X-point phonon softens from high temperature towards the structural transition temperature $T_{s}=410$ K
Externí odkaz:
http://arxiv.org/abs/cond-mat/0408519
Autor:
Ohwada, Kenji, Hirota, Kazuma, Rehrig, Paul W., Gehring, Peter M., Noheda, Beatriz, Fujii, Yasuhiko, Park, Seung-Eek Eagle, Shirane, Gen
Single crystals of the relaxor PZN-xPT display an enormously strong piezoelectric character. Recent x-ray scattering studies have revealed novel electric-field induced phase transitions in PZN-8%PT. As-grown crystals exhibit a rhombohedral structure
Externí odkaz:
http://arxiv.org/abs/cond-mat/0105086
Autor:
Phelan, Daniel, Stock, Christopher, Rodriguez-Rivera, Jose A., Chi, Songxue, Leão, Juscelino, Long, Xifa, Xie, Yujuan, Bokov, Alexei A., Ye, Zuo-Guang, Ganesh, Panchapakesan, Gehring, Peter M.
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, 2014 Feb 01. 111(5), 1754-1759.
Externí odkaz:
https://www.jstor.org/stable/23766891