• 文献标题:   Selective focusing of electrons and holes in a graphene-based superconducting lens
  • 文献类型:   Article
  • 作  者:   GOMEZ S, BURSET P, HERRERA WJ, YEYATI AL
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   1098-0121
  • 通讯作者地址:   Univ Nacl Colombia
  • 被引频次:   20
  • DOI:   10.1103/PhysRevB.85.115411
  • 出版年:   2012

▎ 摘  要

We show that a graphene pnp junction with a central superconducting electrode acts as a Veselago lens for incoming electrons by focusing them and their phase-conjugated counterpart (holes) into different points of the optical axis. This selective focusing suggested by a simple trajectory analysis is confirmed by fully microscopic calculations. Although the focusing pattern is degraded by deviations from the ideal conditions, we show that it remains visible for a wide range of parameters. We discuss how this property can be useful for the detection of entangled electron pairs.