Zobrazeno 1 - 10
of 254
pro vyhledávání: '"Granroth, G"'
Incident Beamline Design for a Modern Cold Triple Axis Spectrometer at the High Flux Isotope Reactor
Autor:
Granroth, G. E., Daum, M., Aczel, A. A., Williams, T. J., Winn, B., Fernandez-Baca, J. A., Mourigal, M., Lumsden, M. D.
Publikováno v:
Nuclear Inst. and Methods in Physics Research, A 1064 (2024) 169440
A modern cold triple axis spectrometer is being planned for the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory. Here, we describe the design of an incident beamline that will put a flux of $\sim 10^8\mathrm{\frac{n}{cm^2 s}}$ on a
Externí odkaz:
http://arxiv.org/abs/2402.01626
Autor:
Saunders, C. N., Ladygin, V. V., Kim, D. S., Bernal-Choban, C. M., Lohaus, S. H., Granroth, G. E., Abernathy, D. L., Fultz, B.
Atomic vibrational dynamics in cuprite, Cu2O, was studied by inelastic neutron scattering and molecular dynamics (MD) simulations from 10 K to 900 K. Above 300 K, a diffuse inelastic intensity (DII) appeared, obscuring the high-energy phonon modes. C
Externí odkaz:
http://arxiv.org/abs/2309.00780
Autor:
Scheie, A., Park, Pyeongjae, Villanova, J. W., Granroth, G. E., Sarkis, C. L., Zhang, Hao, Stone, M. B., Park, Je-Geun, Okamoto, S., Berlijn, T., Tennant, D. A.
Publikováno v:
Phys. Rev. B 108, 104402 (2023)
We report a comprehensive spin wave analysis of the semiconducting honeycomb van der Waal antiferromagnet NiPS$_3$. Using single crystal inelastic neutron scattering, we map out the full Brillouin zone and fit the observed modes to a spin wave model
Externí odkaz:
http://arxiv.org/abs/2302.07242
Autor:
Prisk, T. R., Azuah, R. T., Abernathy, D. L., Granroth, G. E., Sherline, T. E., Sokol, P. E., Hu, J., Boninsegni, M.
We present an inelastic neutron scattering study of liquid and solid hydrogen carried out using the wide Angular Range Chopper Spectrometer at Oak Ridge National Laboratory. From the observed dynamic structure factor, we obtained empirical estimates
Externí odkaz:
http://arxiv.org/abs/2302.03190
Autor:
Xie, Tao, Yin, Qiangwei, Wang, Qi, Kolesnikov, A. I., Granroth, G. E., Abernathy, D. L., Gong, Dongliang, Yin, Zhiping, Lei, Hechang, Podlesnyak, A.
Publikováno v:
Physical Review B 106, 214436 (2022)
Kagome-lattice materials have attracted tremendous interest due to the broad prospect for seeking superconductivity, quantum spin liquid states, and topological electronic structures. Among them, the transition-metal kagome lattices are high-profile
Externí odkaz:
http://arxiv.org/abs/2212.08590
Autor:
Riberolles, S. X. M., Slade, Tyler J., Abernathy, D. L., Granroth, G. E., Li, Bing, Lee, Y., Canfield, P. C., Ueland, B. G., Ke, Liqin, McQueeney, R. J.
TbMn6Sn6 is a metallic ferrimagnet displaying signatures of both topological electrons and topological magnons arising from ferromagnetism and spin-orbit coupling within its Mn kagome layers. Inelastic neutron scattering measurements find strong ferr
Externí odkaz:
http://arxiv.org/abs/2110.14713
Autor:
Scheie, A., Laurell, Pontus, Samarakoon, A. M., Lake, B., Nagler, S. E., Granroth, G. E., Okamoto, S., Alvarez, G., Tennant, D. A.
Publikováno v:
Phys. Rev. B 103, 224434 (2021)
We demonstrate how quantum entanglement can be directly witnessed in the quasi-1D Heisenberg antiferromagnet KCuF$_3$. We apply three entanglement witnesses --- one-tangle, two-tangle, and quantum Fisher information --- to its inelastic neutron spect
Externí odkaz:
http://arxiv.org/abs/2102.08376
Autor:
Scheie, A., Sherman, N. E., Dupont, M., Nagler, S. E., Stone, M. B., Granroth, G. E., Moore, J. E., Tennant, D. A.
Publikováno v:
Nat. Phys. (2021)
Classical hydrodynamics is a remarkably versatile description of the coarse-grained behavior of many-particle systems once local equilibrium has been established. The form of the hydrodynamical equations is determined primarily by the conserved quant
Externí odkaz:
http://arxiv.org/abs/2009.13535
Autor:
Bai, X., Paddison, J. A. M., Kapit, E., Koohpayeh, S. M., Wen, J. -J., Dutton, S. E., Savici, A. T., Kolesnikov, A. I., Granroth, G. E., Broholm, C. L., Chalker, J. T., Mourigal, M.
Publikováno v:
Phys. Rev. Lett. 122, 097201 (2019)
We report a comprehensive inelastic neutron-scattering study of the frustrated pyrochlore antiferromagnet MgCr2O4 in its cooperative paramagnetic regime. Theoretical modeling yields a microscopic Heisenberg model with exchange interactions up to thir
Externí odkaz:
http://arxiv.org/abs/1810.11869
Autor:
LeBlanc, M. D., Aczel, A. A., Granroth, G. E., Southern, B. W., Yan, J. -Q., Nagler, S. E., Whitehead, J. P., Plumer, M. L.
Publikováno v:
Phys. Rev. B 104, 014427 (2021)
Exchange interactions up to fourth nearest neighbor are shown within a classical local-moment Heisenberg approach to be important to model inelastic neutron scattering data on the fcc kagome antiferromagnet IrMn$_3$. Spin wave frequencies are calcula
Externí odkaz:
http://arxiv.org/abs/1807.06659