Zobrazeno 1 - 10
of 251
pro vyhledávání: '"Porter, D G"'
Autor:
Bright, E. Lawrence, Ovchinnikova, E. N., Harding, L. M., Porter, D. G., Springell, R., Dmitrienko, V. E., Caciuffo, R., Lander, G. H.
Publikováno v:
Physical Review B 110, 125138 (2024)
We have conducted a series of scattering experiments at the uranium M4 absorption edge on low-symmetry uranium compounds (U2N3 and U3O8) produced as epitaxial films. At weak and forbidden reflections, we find a resonant signal, independent of tempera
Externí odkaz:
http://arxiv.org/abs/2409.03392
Autor:
Dashwood, C. D., Walker, A. H., Kwasigroch, M. P., Veiga, L. S. I., Faure, Q., Vale, J. G., Porter, D. G., Manuel, P., Khalyavin, D. D., Orlandi, F., Colin, C. V., Fabelo, O., Krüger, F., Perry, R. S., Johnson, R. D., Green, A. G., McMorrow, D. F.
Publikováno v:
Nat. Commun. 14, 6197 (2023)
The layered-ruthenate family of materials possess an intricate interplay of structural, electronic and magnetic degrees of freedom that yields a plethora of delicately balanced ground states. This is exemplified by Ca$_{3}$Ru$_{2}$O$_{7}$, which host
Externí odkaz:
http://arxiv.org/abs/2210.12555
Autor:
Dashwood, C. D., Veiga, L. S. I., Faure, Q., Vale, J. G., Porter, D. G., Collins, S. P., Manuel, P., Khalyavin, D. D., Orlandi, F., Perry, R. S., Johnson, R. D., McMorrow, D. F.
Publikováno v:
Phys. Rev. B 102, 180410(R) (2020)
We show how complex modulated order can spontaneously emerge when magnetic interactions compete in a metal with polar lattice distortions. Combining neutron and resonant x-ray scattering with symmetry analysis, we reveal that the spin reorientation i
Externí odkaz:
http://arxiv.org/abs/2006.12882
Publikováno v:
Phys. Rev. B 100, 134426 (2019)
We examine the magnetic ordering of UN and of a closely related nitride, U2N3, by preparing thin epitaxial films and using synchrotron x-ray techniques. The magnetic configuration and subsequent coupling to the lattice are key features of the electro
Externí odkaz:
http://arxiv.org/abs/1907.11685
Autor:
Bowman, D. F., Cemal, E., Lehner, T., Wildes, A. R., Mangin-Thro, L., Nilsen, G. J., Gutmann, M. J., Voneshen, D. J., Prabhakaran, D., Boothroyd, A. T., Porter, D. G., Castelnovo, C., Refson, K., Goff, J. P.
Publikováno v:
Nature Communications 10:637 (2019)
Pyrochlore systems are ideally suited to the exploration of geometrical frustration in three dimensions, and their rich phenomenology encompasses topological order and fractional excitations. Classical spin ices provide the first context in which it
Externí odkaz:
http://arxiv.org/abs/1902.07179
Akademický článek
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Autor:
Huddart, B. M., Birch, M. T., Pratt, F. L., Blundell, S. J., Porter, D. G., Clark, S. J., Wu, W., Julian, S. R., Hatton, P. D., Lancaster, T.
Publikováno v:
J. Phys.: Condens. Matter 31, 285803 (2019)
We present the results of x-ray scattering and muon-spin relaxation ($\mu^{+}$SR) measurements on the iron-pnictide compound FeCrAs. Polarized non-resonant magnetic x-ray scattering results reveal the 120$^\circ$ periodicity expected from the suggest
Externí odkaz:
http://arxiv.org/abs/1812.09252
Autor:
Porter, D. G., Granata, V., Forte, F., Di Matteo, S., Cuoco, M., Fittipaldi, R., Vecchione, A., Bombardi, A.
Publikováno v:
Phys. Rev. B 98, 125142 (2018)
We review the magnetic and orbital ordered states in \cro{} by performing Resonant Elastic X-ray Scattering (REXS) at the Ru L$_{2,3}$-edges. In principle, the point symmetry at Ru sites does not constrain the direction of the magnetic moment below $
Externí odkaz:
http://arxiv.org/abs/1807.00721
Autor:
Pincini, D., Boseggia, S., Perry, R., Gutmann, M. J., Riccò, S., Veiga, L. S. I., Dashwood, C. D., Collins, S. P., Nisbet, G., Bombardi, A., Porter, D. G., Baumberger, F., Boothroyd, A. T., McMorrow, D. F.
Publikováno v:
Phys. Rev. B 98, 014429 (2018)
The chemical and magnetic structures of the series of compounds Ca$_{2-x}$La$_x$RuO$_4$ [$x = 0$, $0.05(1)$, $0.07(1)$, $0.12(1)$] have been investigated using neutron diffraction and resonant elastic x-ray scattering. Upon La doping, the low tempera
Externí odkaz:
http://arxiv.org/abs/1805.05796
Autor:
Sala, G., Gutmann, M. J., Prabhakaran, D., Pomaranski, D., Mitchelitis, C., Kycia, J. B., Porter, D. G., Castelnovo, C., Goff, J. P.
Publikováno v:
Nat. Mat. 13, 488 (2014)
The idea of magnetic monopoles in spin ice has enjoyed much success at intermediate temperatures, but at low temperatures a description in terms of monopole dynamics alone is insufficient. Recently, numerical simulations were used to argue that magne
Externí odkaz:
http://arxiv.org/abs/1505.07035