SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 57: Poster: Superconductivity I
TT 57.12: Poster
Donnerstag, 30. März 2023, 15:00–18:00, P2/OG2
The superconducting symmetries of CeRh2As2 — •Fabian Jakubczyk1,2, Julia M. Link1,2, and Carsten Timm1,2 — 1Institute of Theoretical Physics, Technische Universität Dresden, 01062 Dresden, Germany — 2Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany
Multiphase unconventional superconductivity is a rare phenomenon, which has recently been discovered in the tetragonal but locally noncentrosymmetric heavy-fermion compound CeRh2As2. Here, the transition between two distinct superconducting phases occurs as a function of magnetic field applied along the c axis and the formation of superconductivity takes place around TSCI = 0.26 K. At µ0H* ≈ 4 T the superconductor changes from a low-field to a high-field state with a large critical field of µ0 Hc2 = 14 T. However, for in-plane fields only the low-field phase appears, with µ0 Hc2 = 2 T. Recent As-NQR experiments further increased the variety of intriguing phenomena in this material, for they detected the onset of antiferromagnetism within the superconducting low-field phase, i.e. at TN<TSCI. In order to study the coexistence and interplay of the potential superconducting and magnetic phases, as well as the effect of an external magnetic field, we conduct a symmetry analysis followed by the construction of a Landau-type energy functional. Thereby we can give a statement about the probable symmetries of the superconducting states.