Condensed Matter Seminar: Prof. Joon Sue Lee, University of Tennessee at Knoxville


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Superconductor-semiconductor hybrid systems for advanced quantum device

Prof. Joon Sue Lee
Department of Physics & Astronomy
University of Tennessee at Knoxville

In superconductor-semiconductor hybrid systems, interfaces and junctions with minimal disorder are crucial for realizing quantum phenomena associated with induced superconductivity. Advances in developing transparent interfaces by molecular beam epitaxy and clean junctions by in-situ shadowing of superconductor deposition have resulted in enhanced features of superconducting proximity effect. These schemes of “epitaxy” and “shadowing” can be applied to quantum devices based on 1D nanowires synthesized by vapor-liquid-solid method, selectively grown in-plane 1D nanowires, and 2D electron gases. In this talk, materials and devices prepared by epitaxy and shadowing will be demonstrated, and transport studies revealing hard superconducting gap, two-electron charging effect, and zero-bias conductance peaks will be discussed.

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