Zobrazeno 1 - 10
of 412
pro vyhledávání: '"Grüninger, M."'
Autor:
Magnaterra, M., Sandberg, A., Schilling, H., Warzanowski, P., Pätzold, L., Bergamasco, E., Sahle, Ch. J., Detlefs, B., Ruotsalainen, K., Sala, M. Moretti, Monaco, G., Becker, P., Faure, Q., Thakur, G. S., Songvilay, M., Felser, C., van Loosdrecht, P. H. M., Brink, J. van den, Hermanns, M., Grüninger, M.
The insulating mixed-valent Ir$^{+3.66}$ compound Ba$_4$NbIr$_3$O$_{12}$ hosts two holes per Ir$_3$O$_{12}$ trimer unit. We address the electronic structure via resonant inelastic x-ray scattering (RIXS) at the Ir $L_3$ edge and exact diagonalization
Externí odkaz:
http://arxiv.org/abs/2411.00125
Autor:
Warzanowski, P., Magnaterra, M., Sahle, Ch. J., Sala, M. Moretti, Becker, P., Bohatý, L., Císařová, I., Monaco, G., Lorenz, T., van Loosdrecht, P. H. M., Brink, J. van den, Grüninger, M.
Mott insulators with spin-orbit entangled j=1/2 moments host intriguing magnetic properties. The j=1/2 wave function requires cubic symmetry, while a noncubic crystal field mixes j=1/2 and 3/2 character. Spectroscopic studies of $5d^5$ iridates typic
Externí odkaz:
http://arxiv.org/abs/2407.12133
Autor:
Maluski, D., Langenbach, M., Szaller, D., Reschke, S., Prodan, L., Mayorga, I. Cámara, Cheong, S. -W., Tsurkan, V., Kézsmárki, I., Hemberger, J., Grüninger, M.
In NiTe$_3$O$_6$ with a chiral crystal structure, we report on a giant natural optical rotation of the lowest-energy magnon. This polarization rotation, as large as 140 deg/mm, corresponds to a path difference between right and left circular polariza
Externí odkaz:
http://arxiv.org/abs/2312.02733
Autor:
Warzanowski, P., Magnaterra, M., Schlicht, G., Faure, Q., Sahle, Ch. J., Becker, P., Bohatý, L., Sala, M. Moretti, Monaco, G., Hermanns, M., van Loosdrecht, P. H. M., Grüninger, M.
Publikováno v:
Phys. Rev. B 109, 155149 (2024)
The half-filled $t_{2g}$ shell of the $t_{2g}^3$ configuration usually, in LS coupling, hosts a S = 3/2 ground state with quenched orbital moment. This state is not Jahn-Teller active. Sufficiently large spin-orbit coupling $\zeta$ has been predicted
Externí odkaz:
http://arxiv.org/abs/2311.11419
Autor:
Magnaterra, M., Attig, J., Peterlini, L., Hermanns, M., Upton, M. H., Kim, Jungho, Prodan, L., Tsurkan, V., Kézsmárki, I., van Loosdrecht, P. H. M., Grüninger, M.
Publikováno v:
Phys. Rev. Lett. 133, 046501 (2024)
Quasimolecular orbitals in cluster Mott insulators provide a route to tailor exchange interactions, which may yield novel quantum phases of matter. We demonstrate the cluster Mott character of the lacunar spinel GaTa$_4$Se$_8$ using resonant inelasti
Externí odkaz:
http://arxiv.org/abs/2309.12454
Autor:
Warzanowski, P., Magnaterra, M., Stein, P., Schlicht, G., Faure, Q., Sahle, Ch. J., Lorenz, T., Becker, P., Bohaty, L., Sala, M. Moretti, Monaco, G., van Loosdrecht, P. H. M., Grüninger, M.
Publikováno v:
Phys. Rev. B 108, 125120 (2023)
We demonstrate that the cubic antifluorite-type halides K$_2$OsCl$_6$, K$_2$OsBr$_6$, and Rb$_2$OsBr$_6$ are excellent realizations of non-magnetic J=0 compounds. The magnetic susceptibility shows the corresponding Van-Vleck type behavior and no sign
Externí odkaz:
http://arxiv.org/abs/2306.12538
Autor:
Magnaterra, M., Hopfer, K., Sahle, Ch. J., Sala, M. Moretti, Monaco, G., Attig, J., Hickey, C., Pietsch, I. -M., Breitner, F., Gegenwart, P., Upton, M. H., Kim, Jungho, Trebst, S., van Loosdrecht, P. H. M., Brink, J. van den, Grüninger, M.
Spin-orbit coupling locks spin direction and spatial orientation and generates, in semi-classical magnets, a local spin easy-axis and associated ordering. Quantum spin-1/2's defy this fate: rather than spins becoming locally anisotropic, the spin-spi
Externí odkaz:
http://arxiv.org/abs/2301.08340
Autor:
Magnaterra, M., Sala, M. Moretti, Monaco, G., Becker, P., Hermanns, M., Warzanowski, P., Lorenz, T., Khomskii, D. I., van Loosdrecht, P. H. M., Brink, J. van den, Grüninger, M.
Publikováno v:
Phys. Rev. Research 5, 013167 (2023)
Motivated by several claims of spin-orbit driven spin-liquid physics in hexagonal Ba$_3$Ti$_{3-x}$Ir$_x$O$_9$ hosting Ir2O9 dimers, we report on resonant inelastic x-ray scattering (RIXS) at the Ir L3 edge for different x. We demonstrate that magneti
Externí odkaz:
http://arxiv.org/abs/2211.13803
Publikováno v:
Physical Review B 107, 214301 (2023)
Using polarization selective spontaneous Raman scattering, we have investigated the 5$d$ transition metal compound K$_2$ReCl$_6$ which displays a series of structural phase transitions. We observe a violation of the Raman selection rules in the cubic
Externí odkaz:
http://arxiv.org/abs/2209.05866
Autor:
Revelli, A., Sala, M. Moretti, Monaco, G., Magnaterra, M., Attig, J., Peterlini, L., Dey, T., Tsirlin, A. A., Gegenwart, P., Fröhlich, T., Braden, M., Grams, C., Hemberger, J., Becker, P., van Loosdrecht, P. H. M., Khomskii, D. I., Brink, J. van den, Hermanns, M., Grüninger, M.
Publikováno v:
Phys. Rev. B 106, 155107 (2022)
The mixed-valent iridate Ba3InIr2O9 has been discussed as a promising candidate for quantum spin-liquid behavior. The compound exhibits Ir$^{4.5+}$ ions in face-sharing IrO6 octahedra forming Ir2O9 dimers with three t2g holes per dimer. Our results e
Externí odkaz:
http://arxiv.org/abs/2207.04795