Zobrazeno 1 - 10
of 1 331
pro vyhledávání: '"Kuneš J"'
Publikováno v:
Phys. Rev. B 110, L100402 (2024)
We present a numerical simulation of the X-ray magnetic circular dichroism (XMCD) at the $L_{2,3}$ edge of Mn in altermagnetic MnF$_2$ using a combination of density functional + exact diagonlization of an atomic model. We explore how the dichroic sp
Externí odkaz:
http://arxiv.org/abs/2405.11833
Autor:
Nakagawa, K., Hariki, A., Okauchi, T., Fujiwara, H., Ahn, K. -H., Murakami, Y., Hamamoto, S., Kanai-Nakata, Y., Kadono, T., Higashiya, A., Tamasaku, K., Yabashi, M., Ishikawa, T., Sekiyama, A., Imada, S., Kuneš, J., Takase, K., Yamasaki, A.
We present Ir $4f$ core-level hard-x-ray photoemission spectroscopy (HAXPES) experiments conducted across antiferromagnetic (AFM) ordering transition in Ruddlesden-Popper iridates Sr$_2$IrO$_4$ and Sr$_3$Ir$_2$O$_7$. The Ir $4f$ spectra exhibit disti
Externí odkaz:
http://arxiv.org/abs/2404.12646
Publikováno v:
Phys. Rev. B 109, 094413 (2024)
We present numerical simulation of the X-ray magnetic circular dichroism (XMCD) of the $L_{2,3}$ and $M_{2,3}$ edges of Ru in antiferromagnetic RuO$_2$ using a combination of density functional + dynamical mean-field theory and configuration interact
Externí odkaz:
http://arxiv.org/abs/2312.02629
The density functional plus dynamical mean-field theory is used to study the spin excitation spectra of SrRu$_2$O$_6$. A good quantitative agreement with experimental spin excitation spectra is found. Depending on the size of the Hund's coupling $J_H
Externí odkaz:
http://arxiv.org/abs/2305.19826
Autor:
Hariki, A., Din, A. Dal, Amin, O. J., Yamaguchi, T., Badura, A., Kriegner, D., Edmonds, K. W., Campion, R. P., Wadley, P., Backes, D., Veiga, L. S. I., Dhesi, S. S., Springholz, G., Šmejkal, L., Výborný, K., Jungwirth, T., Kuneš, J.
Publikováno v:
Phys. Rev. Lett. 132, 176701 (2024)
Altermagnetism is a recently identified magnetic symmetry class combining characteristics of conventional collinear ferromagnets and antiferromagnets, that were regarded as mutually exclusive, and enabling phenomena and functionalities unparalleled i
Externí odkaz:
http://arxiv.org/abs/2305.03588
Autor:
Rahn, M. C., Kummer, K., Hariki, A., Ahn, K. -H., Kunes, J., Amorese, A., Denlinger, J. D., Lu, D. -H., Hashimoto, M., Rienks, E., Valvidares, M., Haslbeck, F., Byler, D. D., McClellan, K. J., Bauer, E. D., Zhu, J. -X., Booth, C. H., Christianson, A. D., Lawrence, J. M., Ronning, F., Janoschek, M.
Publikováno v:
Nature Communications volume 13, Article number: 6129 (2022)
Effective models focused on pertinent low-energy degrees of freedom have substantially contributed to our qualitative understanding of quantum materials. An iconic example, the Kondo model, was key to demonstrating that the rich phase diagrams of cor
Externí odkaz:
http://arxiv.org/abs/2207.11560
Autor:
Takegami, D., Kuo, C. Y., Kasebayashi, K., Kim, J. -G., Chang, C. F., Liu, C. E., Wu, C. N., Kasinathan, D., Altendorf, S. G., Hoefer, K., Meneghin, F., Marino, A., Liao, Y. F., Tsuei, K. D., Chen, C. T., Ko, K. -T., Günther, A., Ebbinghaus, S. G., Seo, J. W., Lee, D. H., Ryu, G., Komarek, A. C., Sugano, S., Shimakawa, Y., Tanaka, A., Mizokawa, T., Kuneš, J., Tjeng, L. H., Hariki, A.
Publikováno v:
Phys. Rev. X 12, 011017 (2022)
We present a comprehensive study of CaCu$_3$Ru$_4$O$_{12}$ using bulk sensitive hard and soft x-ray spectroscopy combined with local-density approximation (LDA) + dynamical mean-field theory (DMFT) calculations. Correlation effects on both the Cu and
Externí odkaz:
http://arxiv.org/abs/2112.02898
Autor:
Ebad-Allah, J., Rojewski, S., Vöst, M., Eickerling, G., Scherer, W., Uykur, E., Sankar, Raman, Varrassi, L., Franchini, C., Ahn, K., Kuneš, J., Kuntscher, C. A.
The anisotropic optical response of the layered, nodal-line semimetal ZrSiS at ambient and high pressure is investigated by frequency-dependent reflectivity measurements for the polarization along and perpendicular to the layers. The highly anisotrop
Externí odkaz:
http://arxiv.org/abs/2106.11600
Publikováno v:
Phys. Rev. B 104, 075152 (2021)
We present a dynamical mean-field study of antiferromagnetic magnons in one-, two- and three-orbital Hubbard model of square and bcc cubic lattice at intermediate coupling strength. Weinvestigate the effect of anisotropy introduced by an external mag
Externí odkaz:
http://arxiv.org/abs/2105.12468
Publikováno v:
Phys. Rev. B 102, 085159 (2020)
We present a dynamical mean-field study of two-particle dynamical response functions in two-band Hubbard model across several phase transitions. We observe that the transition between theexcitonic condensate and spin-state ordered state is continuous
Externí odkaz:
http://arxiv.org/abs/2006.09058