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Conference Paper
Interface Engineering of Superconductors and Topological Insulators for Hot Qubits
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- Authors
- LEE Woo-Jung, CHO Dae-Hyung, HWANG Tae-ha, CHUNG Yong-Duck, LEE Suji, HONG Tae Ei, SHIN Yu Jun
- Issue Date
- 2026-04
- Citation
- 한국물리학회 학술 논문 발표회 (봄) 2026, pp.1-1
- Publisher
- 한국물리학회
- Language
- Korean
- Type
- Conference Paper
- Abstract
- For the practical realization of quantum computing, there is a growing demand for quantum device platforms that operate beyond the millikelvin regime while maintaining scalability and process compatibility. In this work, we investigate quantum materials and device technologies based on heterostructures composed of superconductors (Nb, YBa2Cu3O7) and topological insulator (Bi2Se3), with a particular focus on interface engineering. Ultrathin buffer layers and metallic interlayers were introduced to control interfacial chemical reactions and charge transfer, resulting in improved interface stability and superconducting proximity effects. Based on these engineered interfaces, Josephson junctions and superconducting resonators operating in the GHz frequency range were fabricated and characterized. The correlation between material growth, interfacial properties, and device performance is discussed, highlighting the potential of these hybrid structures as a platform for hot qubits operating at elevated temperatures.
- Keyword
- Superconductor, Topological insulator, Interfacial dynamics, Quantum Computing, Hot qubit
- KSP Keywords
- Charge transfer, Elevated temperatures, Frequency range, Interface engineering, Interface stability, Interfacial dynamics, Josephson junction, Process compatibility, Quantum devices, Superconducting resonators, buffer layer