Thermodynamic and transport studies of the interplay between superconductivity and electronic orders in Fe(Se,Te) and AV3Sb5

  • Datum:

    Dienstag, 13.05.2025, 16.00 Uhr

  • Referent:

    Anmol Shukla
    Institut für QuantenMaterialien und Technologien (IQMT), KIT

  • Abstract: I will present an experimental study of two material systems - the iron-based superconductor Fe(Se,Te) and the kagome metal AV3Sb5 (A = Cs, Rb, K) - using heat capacity, thermal expansion, transport, and magnetization measurements.
    Part I - FeSe1-xTex: Using multiple physical quantities, I show that the two superconducting domes in this series have distinct pairing mechanisms. The evolution of the nematicity–superconductivity coupling and the evidence for giant nemato-elastic coupling are then presented. Key aspects of the accompanying orbital evolution and how they shape the phase diagram are also discussed.
    Part II - AV3Sb5 (A= Cs, Rb, K): I will present the characterization and the comprehensive quantum oscillation study in transport, magnetization, and magnetostriction. The non-monotonic evolution of CDW transition temperature with the alkali atom substitution and the quantum oscillation (QO) study with focus on the signature of CDW reconstruction will be discussed.