Condensed Matter Physics in the Alps: Geometric Frustration, Topology, Flat Bands, and Correlation in Kagome and Van der Waals Systems

Session

Thursday Morning Session I, Chair V. Dobrosavljevic

8 Jan 2026, 08:30

Saas Fee

60. Signatures of unconventional superconductivity in the kagome superconductors Cs(V1-xTix)3Sb5

KEE HOON KIM (Seoul National Univerisity)

08/01/2026, 08:30

Kagome experimental

Invited talk (by invitation only)

CsV3Sb5 exhibits several emergent phenomena, including superconductivity (TC ~ 3.2 K), charge-density wave (TCDW ~ 98 K), and nematicity (Tnem ~ 36 K). Despite tremendous investigations for several years, the nature of the superconductivity and multiple electronic orders, as well as the relationship among them, remain elusive. In this study, we have investigated nematic susceptibility and...

40. Failed Superconductivity in a Geometrically Frustrated 2D Mott System

Dragana Popović

08/01/2026, 09:05

Kagome experimental

Invited talk (by invitation only)

Unconventional superconductivity often emerges in complex materials in which competing orders and complicated band structure obscure its origin. In contrast, $\kappa$-organics are geometrically frustrated quasi-2D single-band systems in which superconductivity arises near the bandwidth-tuned Mott metal-insulator transition in the absence of other orders. We show that in chemically substituted...