Zobrazeno 1 - 10
of 614
pro vyhledávání: '"Sangiovanni, G."'
Autor:
Figgemeier, T., Ünzelmann, M., Eck, P., Schusser, J., Crippa, L., Neu, J. N., Geldiyev, B., Kagerer, P., Buck, J., Kalläne, M., Hoesch, M., Rossnagel, K., Siegrist, T., Lim, L. -K., Moessner, R., Sangiovanni, G., Di Sante, D., Reinert, F., Bentmann, H.
We report the experimental discovery of orbital vortex lines in the three-dimensional (3D) band structure of a topological semimetal. Combining linear and circular dichroism in soft x-ray angle-resolved photoemission (SX-ARPES) with first-principles
Externí odkaz:
http://arxiv.org/abs/2402.10031
Autor:
Horio, M., Forte, F., Sutter, D., Kim, M., Fatuzzo, C. G., Matt, C. E., Moser, S., Wada, T., Granata, V., Fittipaldi, R., Sassa, Y., Gatti, G., Rønnow, H. M., Hoesch, M., Kim, T. K., Jozwiak, C., Bostwick, A., Rotenberg, Eli, Matsuda, I., Georges, A., Sangiovanni, G., Vecchione, A., Cuoco, M., Chang, J.
Publikováno v:
Commun. Phys. 6, 323 (2023)
Doped Mott insulators are the starting point for interesting physics such as high temperature superconductivity and quantum spin liquids. For multi-band Mott insulators, orbital selective ground states have been envisioned. However, orbital selective
Externí odkaz:
http://arxiv.org/abs/2310.13170
Autor:
Kowalski, A., Reitner, M., Del Re, L., Chatzieleftheriou, M., Amaricci, A., Toschi, A., Medici, L. de', Sangiovanni, G., Schäfer, T.
Publikováno v:
Phys. Rev. Lett. 133, 066502 (2024)
We show how the stability conditions for a system of interacting fermions that conventionally involve variations of thermodynamic potentials can be rewritten in terms of one- and two-particle correlators. We illustrate the applicability of this alter
Externí odkaz:
http://arxiv.org/abs/2309.11108
Autor:
Geldiyev, B., Ünzelmann, M., Eck, P., Kißlinger, T., Schusser, J., Figgemeier, T., Kagerer, P., Tezak, N., Krivenkov, M., Varykhalov, A., Fedorov, A., Nicolaï, L., Minár, J., Miyamoto, K., Okuda, T., Shimada, K., Di Sante, D., Sangiovanni, G., Hammer, L., Schneider, M. A., Bentmann, H., Reinert, F.
We study the interplay of lattice, spin and orbital degrees of freedom in a two-dimensional model system: a flat square lattice of Te atoms on a Au(100) surface. The atomic structure of the Te monolayer is determined by scanning tunneling microscopy
Externí odkaz:
http://arxiv.org/abs/2308.02372
Autor:
Hu, H., Rai, G., Crippa, L., Herzog-Arbeitman, J., Călugăru, D., Wehling, T., Sangiovanni, G., Valenti, R., Tsvelik, A. M., Bernevig, B. A.
We use the topological heavy fermion (THF) model and its Kondo Lattice (KL) formulation to study the symmetric Kondo state in twisted bilayer graphene. Via a large-N approximation, we find a symmetric Kondo (SK) state in KL mode at fillings $\nu=0,\p
Externí odkaz:
http://arxiv.org/abs/2301.04673
Autor:
Ünzelmann, M., Bentmann, H., Figgemeier, T., Eck, P., Neu, J. N., Geldiyev, B., Diekmann, F., Rohlf, S., Buck, J., Hoesch, M., Kalläne, M., Rossnagel, K., Thomale, R., Siegrist, T., Sangiovanni, G., Di Sante, D., Reinert, F.
Since the early days of Dirac flux quantization, magnetic monopoles have been sought after as a potential corollary of quantized electric charge. As opposed to magnetic monopoles embedded into the theory of electromagnetism, Weyl crystals exhibit Ber
Externí odkaz:
http://arxiv.org/abs/2012.06996
Autor:
Odobesko, Artem, Di Sante, D., Kowalski, A., Wilfert, S., Friedrich, F., Thomale, R., Sangiovanni, G., Bode, M.
Publikováno v:
Phys. Rev. B 102, 174504 (2020)
The coupling of a spin to an underlying substrate is the basis for a plethora of phenomena. In the case of a metallic substrate, Kondo screening of the adatom magnetic moment can occur. As the substrate turns superconducting, an intriguing situation
Externí odkaz:
http://arxiv.org/abs/2006.09459
Publikováno v:
Phys. Rev. Lett. 125, 196403 (2020)
While the breakdown of the perturbation expansion for the many-electron problem has several formal consequences, here we unveil its physical effect: Flipping the sign of the effective electronic interaction in specific scattering channels. By decompo
Externí odkaz:
http://arxiv.org/abs/2002.12869
Publikováno v:
Phys. Rev. Lett. 125, 086402 (2020)
We study the characteristic time scales of the fluctuating local moments in Hund's metal systems for different degrees of correlation. By analyzing the dynamical spin susceptibility in the real-time domain via the fluctuation-dissipation theorem, we
Externí odkaz:
http://arxiv.org/abs/2001.03584
Publikováno v:
Phys. Rev. B 101, 155148 (2020)
We investigate the divergences appearing in the two-particle irreducible vertex functions of many-fermion systems with attractive on-site interactions. By means of dynamical mean-field theory calculations, we determine the location of singularity lin
Externí odkaz:
http://arxiv.org/abs/1912.02546