Single-crystal growth and superconducting properties in the Sr-Bi-Se system
Author: Böhmer, Anna
Affiliation: Ruhr University Bochum
Type: Poster
Display Dates: 20.07.2026 - 21.07.2026
Board: MT-112
Bi2Se3 is a topological insulator in which Sr-intercalation has been reported to induce superconductivity with an unexpected two-fold anisotropy of the upper critical field, Hc2, in the basal plane. SrBi2Se4 is a recently discovered quasi-one dimensional superconductor that offers a promising platform for exploring exotic superconductivity in low-dimensional systems. We study the formation of the two phases from the melt and examine different single-crystal growth conditions. Using self-flux growth, we obtain free-standing single crystals. We present the characterization of superconductivity of high-quality SrBi2Se4 via transport, heat capacity and tunneling spectroscopy measurements. The hexagonal SrBi2Se4 is found to be a bulk superconductor below Tc = 2.6 K, with an anisotropic Hc2 of approximately 6 T along the c axis, and approximately 1.5 T in the plane.
We acknowledge support from the European Research Council through Project 101040811, Distort-to-Grasp, and from the Deutsche Forschungsgemeinschaft (DFG) under CRC/TRR 288 (Project A02).