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TT: Fachverband Tiefe Temperaturen

TT 28: Unconventional Superconductors

TT 28.4: Vortrag

Mittwoch, 29. März 2023, 10:15–10:30, HSZ 103

Exploring the unconventional superconducting state in Ce₃PtIn₁₁ — Jan Fikáček¹, Sarah R. Dunsiger², Sébastien Laughrea³, Andrea D. Bianchi³, Shinsaku Kambe⁴, Hironori Sakai⁴, Yo Tokunaga⁴, Manuel Brando⁵, and •Jeroen Custers¹ — ¹Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Ke Karlovu 5, 121 16 Prague 2, Czech Republic — ²Centre for Molecular and Materials Science, TRIUMF, Vancouver, British Columbia, Canada V6T 2A3 — ³Département de Physique, Université de Montréal, Montréal, Canada — ⁴Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki 319-1195, Japan — ⁵Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, D-01187, Dresden, Germany

The properties of the heavy fermion compound Ce₃PtIn₁₁ are certainly enigmatic. At ambient pressure, the compound displays two consecutive magnetic transitions into antiferromagnetic (AFM) states at T_N1 = 2.2K and T_N = 2.0K, respectively. Below T_c = 0.32K superconductivity (SC) is found. It has been speculated that AFM and SC coexist because the compound harbors two inequivalent Ce sites each having a specific environment favoring either a magnetic or superconducting state. We focus on the SC state and present specific heat, ¹¹⁵In NQR and recent µSR experiments at ambient pressure and down to 20mK. The results sketch a picture of an unusual unconventional SC state.