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TT: Fachverband Tiefe Temperaturen
TT 62: Correlated Electrons – Poster II
TT 62.5: Poster
Wednesday, March 11, 2026, 15:00–17:00, P4
Locally non Centrosymmetric RRh2Ga2 (R=Ce, La) Systems: NMR/NQR as local probe for Magnetism and Superconductivity — •I. Neme1, A. M. Strydom2, D. T. Adroja3, V. K. Anand3,4, H. Rosner1, and M. Baenitz1 — 1Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 2Physics Department, University of Johannesburg, South Africa — 3ISIS Facility, Rutherford Appleton Laboratory, Chilton, UK — 4Department of Physics, National Institute of Technology Agartala, Tripura, India
CeRh2Ga2 belongs to the class of locally non-centrosymmetric (LNC) correlated Ce Kondo systems [1] and is closely related to the recently discovered superconductor CeRh2As2 [2]. The non-magnetic reference LaRh2Ga2 is superconducting with relatively high Tc of 3.7 K, in contrast with 0.28 K for LaRh2As2. We have performed 69,71Ga, 139La NMR and 69,71Ga NQR studies to probe the magnetism and the superconductivity. For characterization, we present magnetization and heat capacity measurements. Calculations of the band structure and the local electric field gradient at the Ga and La sites support our experimental results. We discuss the magnetic ground state of the Ce system and the occurrence of superconductivity in the La reference on basis of correlations and LNC properties.
[1] V. K. Anand et al., J. Phys. Cond. Matt. 29 (2017)
[2] S. Khim et al., Science 373 (2021)
Keywords: superconductivity; NMR; NQR; Kondo systems