Andreev reflection and bound states in topological insulator based planar and step Josephson junctions

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• 作者：Tarun Choudhari ; Nivedita Deo ; ^{ndeo007@gmail.com}
• 关键词：Step junction ; Ellipticity ; Andreev bound states ; Josephson current
• 刊名：Physica E: Low-dimensional Systems and Nanostructures
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：85
• 期：Complete
• 页码：238-247
• 全文大小：2526 K
• 卷排序：85

文摘

Junction angle dependency of Andreev reflection (AR) and bound states is studied. Potential barrier induced spin rotation causes junction angle dependent AR. Step and planar normal-superconductor junction shows distinct conductive behavior. Dirac cone ellipticity affects Andreev bound state in step Josephson junction. Josephson current can be tuned using potential barrier at the junction.