Sang-Il Park, Hong-Seok Kim, Yasen Hou, Dong Yu, Yong-Joo Doh
언어
영어(ENG)
URL
https://www.earticle.net/Article/A368260
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초록
영어
Superconducting junctions of topological insulator (TI) are expected to host Majorana bound state, which is essential for developing topological quantum information devices. In this study, we fabricated Josephson junctions (JJs) made of Sb-doped Bi2Se3 TI nanoribbon and PbIn superconducting electrodes. In the normal state, the axial magnetoresistance data exhibit periodic oscillations, so-called Aharonov-Bohm oscillations, due to a metallic surface state of TI nanoribbon. At low temperature of 1.5 K, the TI JJ reveals the superconducting proximity effects, such as the critical current and multiple Andreev reflections. Under the application of microwave, integer Shapiro steps are observed with satisfying the ac Josephson relation. Our observations indicate that highly-transparent superconducting contacts are formed at the interface between TI nanoribbon and conventional superconductor, which would be useful to explore Majorana bound state in TI.
목차
Abstract 1. 서론 2. 실험 3. 결과 및 토의 4. 결론 ACKNOWLEDGMENT REFERENCES
Sang-Il Park [ Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Korea ]
Hong-Seok Kim [ Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Korea ]
Yasen Hou [ Department of Physics, University of California, Davis, CA 95616, USA ]
Dong Yu [ Department of Physics, University of California, Davis, CA 95616, USA ]
Yong-Joo Doh [ Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Korea ]
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