ELFT HÍRADÓ

[Szeminárium koordinátor <sem-admin AT wigner.hun-ren.hu>]

SZFI SeminarWojciech BrzezickiJagiellonian University, Kraków (host: Imre 
Hagymási)Multipolar current phases in correlated systemsTuesday, 29 September 
2026, 10:00, KFKI Campus, Bldg. 1, 2nd floor, Conference RoomWe unveil 
signatures of multipolar current phases in kagome CsTi₃Bi₅ and layered 
perovskite Sr₂RuO₄. This is done using circularly polarized, spin-selective, 
angular-resolved photoelectron spectroscopy, which shows intriguing asymmetry 
between spin-up and spin-down signals. In both cases a multipolar, 
spin-orbital current phases are postulated, and verified for stability, to 
account for this effect, as more conventional types of order must be excluded 
as incoherent with experiments. In both cases we develop description of the 
spin-dichroic signal by means of a tight-binding model with a special form of 
a time-reversal symmetry.References:[1] F. Mazzola, W. Brzezicki,..., M. 
Cuoco, Anomalous spin-optical helical effect in Ti-based kagome metal, 
arXiv:2502.19589[2] F. Mazzola, W. Brzezicki, M.T. Mercaldo, A. Guarino, C. 
Bigi, J.A. Miwa, D. De Fazio, A. Crepaldi, J. Fujii, G. Rossi, P. Orgiani, S. 
K. Chaluvadi, S. P. Chalil, G. Panaccione, A. Jana, V. Polewczyk, I. 
Vobornik, C. Kim, F. Miletto-Granozio, R. Fittipaldi, C. Ortix, M. Cuoco, A. 
Vecchione, Signatures of a surface spin-orbital chiral metal, Nature 626, 752 
(2024).  I acknowledge support from the National Science Centre (NCN, Poland) 
under Project No. 2021/43/B/ST3/02166   Minden érdeklődőt szívesen 
látunk! - Everyone is welcome to attend.Tamás 
Pusztaisem-admin AT wigner.hun-ren.hu