Zobrazeno 1 - 10
of 689
pro vyhledávání: '"P Ewings"'
Autor:
Ono, Ryota, Kaushik, Ravi, Artyukhin, Sergey, Jansen, Martin, Solovyev, Igor, Ewings, Russell A.
Alkali superoxides differ from conventional transition metal magnets, exhibit magnetism from partially occupied oxygen molecular $\pi^*$-orbitals. Among them, CsO$_2$ stands out for its potential to exhibit novel quantum collective phenomena, such as
Externí odkaz:
http://arxiv.org/abs/2411.06671
ZrW$_{2}$O$_{8}$ is the prototypical example of a material exhibiting negative thermal expansion (NTE). As well as being among the first NTE materials to be studied in detail, it has served as a test bed for ideas for the physical mechanisms that lea
Externí odkaz:
http://arxiv.org/abs/2408.10797
Autor:
Lane, H., Sarte, P. M., Guratinder, K., Arevalo-Lopez, A. M., Perry, R. S., Hunter, E. C., Weber, T., Roessli, B., Stunault, A., Su, Y., Ewings, R. A., Wilson, S. D., Böni, P., Attfield, J. P., Stock, C.
Publikováno v:
Phys. Rev. Research 5, 043146 (2023)
MgV$_{2}$O$_{4}$ is a spinel based on magnetic V$^{3+}$ ions which host both spin ($S=1$) and orbital ($l_{eff}=1$) moments. Owing to the underlying pyrochlore coordination of the magnetic sites, the spins in MgV$_{2}$O$_{4}$ only antiferromagnetical
Externí odkaz:
http://arxiv.org/abs/2309.06853
Autor:
Ewings, R. A., Reehuis, M., Orlandi, F., Manuel, P., Khalyavin, D. D., Gibbs, A. S., Fortes, A. D., Hoser, A., Princep, A. J., Jansen, M.
CsO2 is a member of the family of alkali superoxides (formula AO2 with A= Na, K, Rb and Cs) that exhibit magnetic behavior arising from open $p$-shell electrons residing on O2- molecules. We use neutron diffraction to solve the crystal and magnetic s
Externí odkaz:
http://arxiv.org/abs/2306.14724
Autor:
Jenni, K., Kunkemöller, S., Tewari, A., Ewings, R. A., Sidis, Y., Schneidewind, A., Steffens, P., Nugroho, A. A., Braden, M.
The magnetic excitations in ferromagnetic SrRuO$_3$ were studied by inelastic neutron scattering combining experiments on triple-axis and time-of-flight spectrometers with and without polarization analysis. A quadratic spin-wave dispersion with an an
Externí odkaz:
http://arxiv.org/abs/2305.05497
Autor:
Chan, E., Lane, H., Pásztorová, J., Songvilay, M., Johnson, R. D., Downie, R., Bos, J-W. G., Rodriguez-Rivera, J. A., Cheong, S. -W., Ewings, R. A., Qureshi, N., Stock, C.
Publikováno v:
Phys. Rev. B 107, 144420 (2023)
MnSb$_{2}$O$_{6}$ is based on the noncentrosymmetric $P321$ space group with magnetic Mn$^{2+}$ ($S={5/2}$, $L\approx 0$) spins ordering below $T_{\mathrm{N}}=12$ K in a helicoidal structure. The ground state magnetic structure, expected to be built
Externí odkaz:
http://arxiv.org/abs/2304.05732
Autor:
Jiangtao Wu, Yifei Lin, Mingfang Shu, Yifei Liu, Yupeng Ma, Gaoting Lin, Cuiping Zhang, Pengfei Jiao, Fengfeng Zhu, Yan Wu, Russell A. Ewings, Helen C. Walker, Guochu Deng, Songxue Chi, Shengwei Jiang, Matteo Baggioli, Min Jin, Haozhe Wang, Weiwei Xie, Tian-Ran Wei, Jiong Yang, Xun Shi, Jie Ma
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-9 (2024)
Abstract Stacking two-dimensional (2D) van der Waals (vdW) materials in a layered bulk structure provides an appealing platform for the emergence of exotic physical properties. As a vdW crystal with exceptional plasticity, InSe offers the opportunity
Externí odkaz:
https://doaj.org/article/6fc7f6cee098426ea28b0d42ecbf4573
Autor:
E. Smyth, D. Griffiths, K. Cozens, S. Ewings, R. Waugh, R.C. Turkington, K. Foley, R. Roy, S. Ngan, R. Owen, D. Chuter, C. Steele, G. Griffiths
Publikováno v:
ESMO Gastrointestinal Oncology, Vol 6, Iss , Pp 100114- (2024)
Operable gastrooesophageal adenocarcinoma (GOA) is treated with multimodality therapy which is curative in
Externí odkaz:
https://doaj.org/article/a85486a3bdcf4d0b8770705766870e94
Autor:
Qin, Yayuan, Shen, Yao, Hao, Yiqing, Wo, Hongliang, Shen, Shoudong, Ewings, Russell A., Zhao, Yang, Harriger, Leland W., Lynn, Jeffrey W., Zhao, Jun
The discovery of pressure-induced superconductivity in helimagnets (CrAs, MnP) has attracted considerable interest in understanding the relationship between complex magnetism and unconventional superconductivity. However, the nature of the magnetism
Externí odkaz:
http://arxiv.org/abs/2212.13865
RbFe$^{2+}$Fe$^{3+}$F$_{6}$ is an example of an antiferromagnet with charge ordering of the octahedrally coordinated Fe$^{2+}$ and Fe$^{3+}$ ions. As well as different spin values, Fe$^{2+}$ ($S=2$) and Fe$^{3+}$ ($S={5\over2}$) possess differing orb
Externí odkaz:
http://arxiv.org/abs/2207.11706