Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Roger D Johnson"'
Autor:
Ryutaro Okuma, Kylie MacFarquharson, Roger D. Johnson, David Voneshen, Pascal Manuel, Radu Coldea
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024)
Abstract The physics of spin-orbit entangled magnetic moments of 4d and 5d transition metal ions on a honeycomb lattice has been much explored in the search for unconventional magnetic orders or quantum spin liquids expected for compass spin models,
Externí odkaz:
https://doaj.org/article/458a31a512154f20a400d10b46221d23
Autor:
Junzhuang Cong, Kun Zhai, Yisheng Chai, Dashan Shang, Dmitry D. Khalyavin, Roger D. Johnson, Denis P. Kozlenko, Sergey E. Kichanov, Artem M. Abakumov, Alexander A. Tsirlin, Leonid Dubrovinsky, Xueli Xu, Zhigao Sheng, Sergey V. Ovsyannikov, Young Sun
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)
Multiferroic binary oxides with the perovskite structure have been very rare. Here, Cong et al. report magnetically-driven ferroelectricity and a large magnetoelectric effect in a binary perovskite compound Mn2O3 at low temperatures.
Externí odkaz:
https://doaj.org/article/4208ca178e1940a0a74b54a0d2726731
Autor:
Rebecca Scatena, Ran Liu, Vladimir V. Shvartsman, Dmitry D. Khalyavin, Yoshiyuki Inaguma, Kazunari Yamaura, Alexei A. Belik, Roger D. Johnson
Publikováno v:
Angewandte Chemie International Edition.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ff0baf4d2111af8de063ebd9d8ae99b
https://doi.org/10.1002/anie.202305994
https://doi.org/10.1002/anie.202305994
Publikováno v:
Physical Review B. 107
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4df5d1e21d7fa69f47b0dfb9213f5f0f
https://doi.org/10.1103/physrevb.107.l140402
https://doi.org/10.1103/physrevb.107.l140402
Publikováno v:
Physical Review B. 106
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f8b9e36142171361e834643c8e04d0f
https://doi.org/10.1103/physrevb.106.024416
https://doi.org/10.1103/physrevb.106.024416
Autor:
Serena M. Birnbaum, Robert C. Williams, Samuel P. M. Curley, Melissa L. Rhodehouse, David Walker, Jamie L. Manson, John Singleton, Andrew Ozarowski, Danielle Y. Villa, A. M. Vibhakar, Roger D. Johnson, Paul Goddard
Publikováno v:
Journal of the American Chemical Society
The [Zn1–xNix(HF2)(pyz)2]SbF6 (x = 0.2; pyz = pyrazine) solid solution exhibits a zero-field splitting (D) that is 22% larger [D = 16.2(2) K (11.3(2) cm–1)] than that observed in the x = 1 material [D = 13.3(1) K (9.2(1) cm–1)]. The substantial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bc322e1c11d16520774a7cc6ee62a17
http://europepmc.org/articles/PMC8017523
http://europepmc.org/articles/PMC8017523
Publikováno v:
Dalton Transactions. 50:15458-15472
Perovskite-structure AMnO3 manganites played an important role in the development of numerous physical concepts such as double exchange, small polarons, electron–phonon coupling, and Jahn–Teller effects, and they host a variety of important prope
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fb98fc0272cd74a00f84542784a638d
https://doi.org/10.1039/d1dt02992d
https://doi.org/10.1039/d1dt02992d
Autor:
Roger D. Johnson, Masahiko Tanaka, Dmitry D. Khalyavin, Yoshitaka Matsushita, Alexei A. Belik
Publikováno v:
Journal of Materials Chemistry C. 9:10232-10242
The presence of strongly competing electronic instabilities in a crystalline material can produce fascinating structural phenomena. For example, the A-site-ordered quadruple perovskite BiMn7O12 hosts both active polar instabilities of the Bi3+ lone p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e523a7167acb3a3941f7f6a19dec523f
https://doi.org/10.1039/d1tc02344f
https://doi.org/10.1039/d1tc02344f
Autor:
Roger D. Johnson, Rebecca Scatena, Masahiko Tanaka, Kazunari Yamaura, Ran Liu, Yoshiyuki Inaguma, Alexei A. Belik, Dmitry D. Khalyavin, Yoshitaka Matsushita
Publikováno v:
Inorganic Chemistry. 59:9065-9076
The formation of NaRMn2Ti4O12 compounds (R = rare earth) under high pressure (about 6 GPa) and high temperature (about 1750 K) conditions was studied. Such compounds with R = Sm, Eu, Gd, Dy, Ho, Y ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dc5ad0394f4033474f0a844b55ff1e5
https://doi.org/10.1021/acs.inorgchem.0c00938
https://doi.org/10.1021/acs.inorgchem.0c00938
Publikováno v:
Journal of Materials Chemistry C. 8:12840-12847
We have investigated the magnetic and electronic structures of crystalline dimethylammonium copper formate [(CH3)2NH2]Cu(HCOO)3, a model compound that belongs to a wide class of hybrid organic–inorganic perovskites. We present the results of a comb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e2887f2bc8c45514b0c5ce6e51b63dd
https://doi.org/10.1039/d0tc03913f
https://doi.org/10.1039/d0tc03913f