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TT: Fachverband Tiefe Temperaturen
TT 73: Low-Dimensional Systems: Topological Order
TT 73.11: Talk
Thursday, March 10, 2016, 18:00–18:15, H19
Gate-tunable Andreev bound states in InSb Nanowire Josephson junction — •Ning Kang1, Sen Li1, Dingxun Fan1, Philippe Caroff2, and Hongqi Xu1 — 1Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, P. R. China. — 2Division of Solid State Physics, Lund University, P. O. Box 118, S-221 00 Lund, Sweden
Hybrid InSb nanowire-superconductor devices are promising candidates for investigating Majorana modes in solid-state devices and future technologies of topological quantum manipulation. Here, we report low-temperature transport measurements on an individual InSb nanowire quantum dot coupled to superconducting contacts that exhibit an interplay between the Kondo effects and uperconductivity. We observed two types of subgap resonance states within the superconudcting gap, which can be attributed to gate-tunable Andreev bound states in Coulomb valleys with different Kondo temperatures. The presence of the gate-tunable 0 and pijunction allow us to invetigate the fundamental 0- pi transition. Detailed magnetic field and temperature evolution of level spectroscopy demonstrate different behavior of two types of the Andreev bound states. Our results exhibit that the InSb nanowires can provide a promising platform for exploring phase coherence transport and the effect of spin-orbit couping in semiconductor nanowire-superconductor hybird device.