Theory of point-contact spectroscopy in electron-doped cuprate superconductors

C. S. Liu*, W. C. Wu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

6 引文 斯高帕斯(Scopus)

摘要

In the hole-doped d x2 - y2 -wave cuprate superconductors, due to the midgap surface state (MSS), a zero-bias conductance peak (ZBCP) is widely observed in [110] interface point-contact spectroscopy (PCS). However, a ZBCP of this geometry is rarely observed in the electron-doped cuprates, even though their pairing symmetry is still likely of the d x2 - y2 wave type. We argue that this is due to the coexistence of antiferromagnetic (AF) and superconducting orders. Generalizing the Blonder-Tinkham-Klapwijk formula to include an AF coupling, it is shown explicitly that the MSS is destroyed by the AF order. The calculated PCS is in good agreement with the experiments.

原文英語
文章編號220504
期刊Physical Review B - Condensed Matter and Materials Physics
76
發行號22
DOIs
出版狀態已發佈 - 2007 十二月 6

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學

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