Zobrazeno 1 - 10
of 984
pro vyhledávání: '"Vale, J A"'
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., Geondzhian, A., Vale, J. G., Pakpour-Tabrizi, A. C., Howard, C. A., Faure, Q., Veiga, L. S. I., Meyers, D., Chiuzbaian, S. G., Nicolaou, A., Jaouen, N., Jackman, R. B., Nag, A., Garcia-Fernandez, M., Zhou, Ke-Jin, Walters, A. C., Gilmore, K., McMorrow, D. F., Dean, M. P. M.
Publikováno v:
Phys. Rev. X 11, 041052 (2021)
Interactions between electrons and lattice vibrations are responsible for a wide range of material properties and applications. Recently, there has been considerable interest in the development of resonant inelastic x-ray scattering (RIXS) as a tool
Externí odkaz:
http://arxiv.org/abs/2110.09572
Autor:
Veiga, L. S. I., Etter, M., Cappelli, E., Jacobsen, H., Vale, J. G., Dashwood, C. D, Le, D., Baumberger, F., McMorrow, D. F., Perry, R. S.
Publikováno v:
Phys. Rev. Materials 4, 094202 (2020)
We report the synthesis and characterisation of polycrystalline Na$_2$RuO$_3$, a layered material in which the Ru$^{4+}$ ($4d^4$ configuration) form a honeycomb lattice. The optimal synthesis condition was found to produce a nearly ordered Na$_2$RuO$
Externí odkaz:
http://arxiv.org/abs/2009.07105
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
Autor:
Mazzone, D. G., Meyers, D., Cao, Y., Vale, J. G., Dashwood, C. D., Shi, Y., James, A. J. A., Robinson, N. J., Lin, J. Q., Thampy, V., Tanaka, Y., Johnson, A. S., Miao, H., Wang, R., Assefa, T. A., Kim, J., Casa, D., Mankowsky, R., Zhu, D., Alonso-Mori, R., Song, S., Yavas, H., Katayama, T., Yabashi, M., Owada, Y. Kubota S., Liu, J., Yang, J., Konik, R. M., Robinson, I. K., Hill, J. P., McMorrow, D. F., Forst, M., Wall, S., Liu, X., Dean, M. P. M.
Publikováno v:
PNAS 118 e2103696118 (2021)
Although ultrafast manipulation of magnetism holds great promise for new physical phenomena and applications, targeting specific states is held back by our limited understanding of how magnetic correlations evolve on ultrafast timescales. Using ultra
Externí odkaz:
http://arxiv.org/abs/2002.07301
Autor:
Vale, J. G., Dashwood, C. D., Paris, E., Veiga, L. S. I., Garcia-Fernandez, M., Nag, A., Walters, A., Zhou, K. J., Pietsch, I. -M., Jesche, A., Gegenwart, P., Coldea, R., Schmitt, T., McMorrow, D. F.
Publikováno v:
Phys. Rev. B 100, 224303 (2019)
The excitations in honeycomb $\alpha$-Li$_2$IrO$_3$ have been investigated with high-resolution resonant inelastic x-ray scattering (RIXS) at the O K edge. The low-energy response is dominated by a fully resolved ladder of excitations, which we inter
Externí odkaz:
http://arxiv.org/abs/1911.07545
Autor:
Veiga, L. S. I., Glazyrin, K., Fabbris, G., Dashwood, C. D., Vale, J. G., Park, H., Etter, M., Irifune, T., Pascarelli, S., McMorrow, D. F., Takayama, T., Takagi, H., Haskel, D.
Publikováno v:
Phys. Rev. B 100, 064104 (2019)
A pressure-induced collapse of magnetic ordering in $\beta$-Li$_2$IrO$_3$ at $P_m\sim1.5- 2$ GPa has previously been interpreted as evidence for possible emergence of spin liquid states in this hyperhoneycomb iridate, raising prospects for experiment
Externí odkaz:
http://arxiv.org/abs/1905.08211
Autor:
Dashwood, C. D., Miao, H., Vale, J. G., Ishikawa, D., Prishchenko, D. A., Mazurenko, V. V., Mazurenko, V. G., Perry, R. S., Cao, G., de la Torre, A., Baumberger, F., Baron, A. Q. R., McMorrow, D. F., Dean, M. P. M.
Publikováno v:
Phys. Rev. B 100, 085131 (2019)
The mixing of orbital and spin character in the wave functions of the $5d$ iridates has led to predictions of strong couplings among their lattice, electronic and magnetic degrees of freedom. As well as realizing a novel spin-orbit assisted Mott-insu
Externí odkaz:
http://arxiv.org/abs/1904.10391
Autor:
Vale, J. G., Calder, S., Bogdanov, N. A., Donnerer, C., Sala, M. Moretti, Davies, N. R., Yamaura, J., Hiroi, Z., Mandrus, D., Brink, J. van den, Christianson, A. D., McMorrow, D. F.
Publikováno v:
Phys. Rev. B 101, 014441 (2020)
High-resolution resonant inelastic x-ray scattering (RIXS) measurements ($\Delta$E = 46 meV) have been performed on Cd$_2$Os$_2$O$_7$ through the metal-to-insulator transition (MIT). A magnetic excitation at 125 meV evolves continuously through the M
Externí odkaz:
http://arxiv.org/abs/1812.08689
Autor:
Vale, J. G., Boseggia, S., Walker, H. C., Springell, R. S., Hunter, E. C., Perry, R. S., Collins, S. P., McMorrow, D. F.
X-ray magnetic critical scattering measurements and specific heat measurements were performed on the perovskite iridate Sr$_3$Ir$_2$O$_7$. We find that the magnetic interactions close to the N\'{e}el temperature $T_N$ = 283.4(2) K are three-dimension
Externí odkaz:
http://arxiv.org/abs/1812.08682