Parts | Days | Selection | Search | Updates | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 52: Heavy Fermions

TT 52.5: Talk

Wednesday, March 11, 2026, 16:00–16:15, HSZ/0103

Intertwined magnetic and superconducting orders in Ce₃PtIn₁₁ — Jan Fikáček¹, Sarah R. Dunsiger², Andrea D. Bianchi³, Manuel Brando⁴, Laurent Nicolai⁵, Aki Pulkkinen⁵, and •Jeroen Custers¹ — ¹Charles University, Faculty of Mathematics and Physics, Dept. Condensed Matter Physics, Prague, Czech Republic — ²Centre for Molecular and Materials Science, TRIUMF, Vancouver, Canada — ³Département de Physique, Université de Montréal, Montréal, Canada — ⁴Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — ⁵New Technologies Research Centre, University of West Bohemia, Pilsen, Czech Republic

The heavy fermion compound Ce₃PtIn₁₁ exhibits intriguing low-temperature properties. At ambient pressure, it undergoes two successive antiferromagnetic (AFM) transitions at T_N1=2.2 K and T_N=2.0 K. Superconductivity (SC) emerges below T_c=0.32 K (J. Prokleška et al., Phys. Rev. B 92, 161114(R) (2015)). The coexistence of AFM and SC has been proposed, attributed to the presence of two inequivalent Ce sites whose distinct local environments may stabilize either magnetic or superconducting order. In this work, we focus on the superconducting state, presenting specific heat measurements and recent muon spin rotation experiments performed at ambient pressure down to 20 mK, complemented by band-structure calculations. Together, these results reveal signatures of an unconventional SC state coexisting with magnetism.

Work is supported by the Czech Ministry for Education, Youth and Sports program INTERCOST (Grant No. LUC24139).

Keywords: Complex magentism; Unconventional superconductivity; Kondo lattice; Heavy Fermion; Band structure