Zobrazeno 1 - 10
of 427
pro vyhledávání: '"Agrestini, S"'
Impact of electron correlations on two-particle charge response in electron- and hole-doped cuprates
Autor:
Nag, Abhishek, Zinni, Luciano, Choi, Jaewon, Li, J., Tu, Sijia, Walters, A. C., Agrestini, S., Hayden, S. M., Bejas, Matías, Lin, Zefeng, Yamase, H., Jin, Kui, García-Fernández, M., Fink, J., Greco, Andrés, Zhou, Ke-Jin
Publikováno v:
Phys. Rev. Research 6, 043184 (2024)
Estimating many-body effects that deviate from an independent particle approach, has long been a key research interest in condensed matter physics. Layered cuprates are prototypical systems, where electron-electron interactions are found to strongly
Externí odkaz:
http://arxiv.org/abs/2407.15692
Autor:
Martinelli, L., Biało, I., Hong, X., Oppliger, J., Lin, C., Schaller, T., Küspert, J., Fischer, M. H., Kurosawa, T., Momono, N., Oda, M., Choi, J., Agrestini, S., Garcia-Fernandez, M., Zhou, Ke-Jin, Wang, Q., Chang, J.
The relation between charge order, its quantum fluctuations and optical phonon modes in cuprate superconductors remains an unsolved problem. The exploration of these excitations is however complicated by the presence of twinned domains. Here, we use
Externí odkaz:
http://arxiv.org/abs/2406.15062
Autor:
Agrestini, S., Borgatti, F., Florio, P., Frassineti, J., Mosca, D. Fiore, Faure, Q., Detlefs, B., Sahle, C. J., Francoual, S., Choi, J., Garcia-Fernandez, M., Zhou, K. -J., Mitrovic, V. F., Woodward, P. M., Ghiringhelli, G., Franchini, C., Boscherini, F., Sanna, S., Sala, and M. Moretti
Publikováno v:
Phys. Rev. Lett. 133, 066501 (2024)
A supposedly nonmagnetic 5d$^1$ double perosvkite oxide is investigated by a combination of spectroscopic and theoretical methods, namely resonant inelastic X-ray scattering, X-ray absorption spectroscopy, magnetic circular dichroism, and multiplet l
Externí odkaz:
http://arxiv.org/abs/2401.12035
Autor:
Rossi, M., Lu, H., Lee, K., Goodge, B. H., Choi, J., Osada, M., Lee, Y., Li, D., Wang, B. Y., Jost, D., Agrestini, S., Garcia-Fernandez, M., Shen, Z. X., Zhou, Ke-Jin, Been, E., Moritz, B., Kourkoutis, L. F., Devereaux, T. P., Hwang, H. Y., Lee, W. S.
We conducted a comparative study of the rare-earth infinite-layer nickelates films, RNiO2 (R = La, Pr, and Nd) using resonant inelastic X-ray scattering (RIXS). We found that the gross features of the orbital configurations are essentially the same,
Externí odkaz:
http://arxiv.org/abs/2312.16444
Autor:
von Arx, K., Rothenbühler, P., Wang, Qisi, Choi, J., Garcia-Fernandez, M., Agrestini, S., Zhou, Ke-Jin, Vecchione, A., Fittipaldi, R., Sassa, Y., Cuoco, M., Forte, F., Chang, J.
Multi-band Mott insulators with moderate spin-orbit and Hund's coupling are key reference points for theoretical concept developments of correlated electron systems. The ruthenate Mott insulator Ca$_{2}$RuO$_{4}$ has therefore been intensively studie
Externí odkaz:
http://arxiv.org/abs/2312.04406
Autor:
Biało, I., Martinelli, L., De Luca, G., Worm, P., Drewanowski, A., Choi, J., Garcia-Fernandez, M., Agrestini, S., Zhou, Ke-Jin, Kummer, K., Brookes, N. B., Guo, L., Edgeton, A., Eom, C. B., Tomczak, J. M., Held, K., Gibert, M., Wang, Qisi, Chang, J.
Publikováno v:
Commun. Phys. 7, 230 (2024)
Magnetic frustration is a route that can lead to the emergence of novel ground states, including spin liquids and spin ices. Such frustration can be introduced through either the geometry of lattice structures or by incompatible exchange interactions
Externí odkaz:
http://arxiv.org/abs/2306.05828
Autor:
Scott, K., Kisiel, E., Boyle, T. J., Basak, R., Jargot, G., Das, S., Agrestini, S., Garcia-Fernandez, M., Choi, J., Pelliciari, J., Li, J., Chuang, Y. D., Zhong, R. D., Schneeloch, J. A., Gu, G. D., Légaré, F., Kemper, A. F., Zhou, Ke-Jin, Bisogni, V., Blanco-Canosa, S., Frano, A., Boschini, F., Neto, E. H. da Silva
Publikováno v:
Science Advances 9, eadg3710 (2023)
In the study of dynamic charge order correlations in the cuprates, most high energy-resolution resonant inelastic x-ray scattering (RIXS) measurements have focused on momenta along the high-symmetry directions of the copper oxide plane. However, elec
Externí odkaz:
http://arxiv.org/abs/2301.08415
Autor:
Hepting, M., Bejas, M., Nag, A., Yamase, H., Coppola, N., Betto, D., Falter, C., Garcia-Fernandez, M., Agrestini, S., Zhou, K. -J., Minola, M., Sacco, C., Maritato, L., Orgiani, P., Wei, H. I., Shen, K. M., Schlom, D. G., Galdi, A., Greco, A., Keimer, B.
Publikováno v:
Phys. Rev. Lett. 129, 047001 (2022)
We use resonant inelastic x-ray scattering (RIXS) to probe the propagation of plasmons in the electron-doped cuprate superconductor Sr$_{0.9}$La$_{0.1}$CuO$_2$ (SLCO). We detect a plasmon gap of $\sim$~120 meV at the two-dimensional Brillouin zone ce
Externí odkaz:
http://arxiv.org/abs/2206.14083
Autor:
Nag, A., Nocera, A., Agrestini, S., Garcia-Fernandez, M., Walters, A. C., Cheong, Sang-Wook, Johnston, S., Zhou, Ke-Jin
Publikováno v:
Nature Communications 13, 2327 (2022)
The microscopic origins of emergent behaviours in condensed matter systems are encoded in their excitations. In ordinary magnetic materials, single spin-flips give rise to collective dipolar magnetic excitations called magnons. Likewise, multiple spi
Externí odkaz:
http://arxiv.org/abs/2111.03625
Autor:
Lu, H., Rossi, M., Nag, A., Osada, M., Li, D. F., Lee, K., Wang, B. Y., Garcia-Fernandez, M., Agrestini, S., Shen, Z. X., Been, E. M., Moritz, B., Devereaux, T. P., Zaanen, J., Hwang, H. Y., Zhou, Ke-Jin, Lee, W. S.
Publikováno v:
Science 373, 213-216 (2021)
The discovery of superconductivity in infinite-layer nickelates brings us tantalizingly close to a new material class that mirrors the cuprate superconductors. Here, we report on magnetic excitations in these nickelates, measured using resonant inela
Externí odkaz:
http://arxiv.org/abs/2105.11300