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TT: Fachverband Tiefe Temperaturen
TT 29: Unconventional Superconductors
TT 29.12: Vortrag
Dienstag, 10. März 2026, 12:30–12:45, CHE/0091
Inverse proximity effect and unconventional superconductivity in the Pb/CrTe hybrid thin films — •Lichen Ji1,2, Wei Chen2, Xinyu Zhou2, Xusheng Wang2, Yi Hu2, Xiaopeng Hu2, Qinghua Zhang3, Ding Zhang2, Qi-kun Xue2, and Shuai-Hua Ji2 — 1Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany — 2State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China — 3Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Two-dimensional (2D) heterostructures provide an important platform for exploring unconventional quantum states. Here, we investigate molecular-beam-epitaxial 2D vertical superconductor (S)/ferromagnet (F) hybrids composed of superconducting Pb and ferromagnetic CrTe using in situ scanning tunneling microscopy and ex situ transport measurements. We observe an unconventional superconducting gap structure accompanied by a pronounced inverse proximity effect. Transport data further show strong suppression of both the critical temperature and upper critical field. Importantly, the critical temperature exhibits an oscillatory dependence on the CrTe thickness, and re-entrant superconductivity emerges within a finite magnetic-field window. These results offer new insights into the unconventional superconducting properties of Pb/CrTe hybrids, underscoring the crucial role of interfacial effect and inverse proximity effect.
Keywords: Molecular beam epitaxy; Superconductor/ferromagnet hybrids; Inverse proximity effect; Unconventional superconductivity