• 文献标题:   Manifestations of phase-coherent transport in graphene - The Josephson effect, weak localization, and aperiodic conductance fluctuations
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   HEERSCHE HB, JARILLOHERRERO P, OOSTINGA JB, VANDERSYPEN LMK, MORPURGO AF
  • 作者关键词:  
  • 出版物名称:   EUROPEAN PHYSICAL JOURNALSPECIAL TOPICS
  • ISSN:   1951-6355
  • 通讯作者地址:   Delft Univ Technol
  • 被引频次:   11
  • DOI:   10.1140/epjst/e2007-00223-7
  • 出版年:   2007

▎ 摘  要

The electronic transport properties of graphene exhibit pronounced differences from those of conventional two dimensional electron systems investigated in the past. As a consequence, well established phenomena such as the integer quantum Hall effect and weak localization manifest themselves differently in graphene. Here we present an overview of recent experiments that we have performed to probe phase coherent transport. In particular, we have investigated in great detail Josephson supercurrent and superconducting proximity effect in junctions consisting of a graphene layer in between superconducting electrodes. We have also used the same devices to measure aperiodic conductance fluctuations and weak localization. The experimental results clearly indicate that low-temperature transport in graphene is phase coherent on a similar to 1 mu m length scale, irrespective of the position of the Fermi level. We discuss the different behavior of Josephson supercurrent and weak localization in terms of the unusual properties of the electronic states in graphene upon time reversal symmetry.