Nanoscale surface element identification and dopant homogeneity in the high-Tc superconductor PrxCa1-xFe 2As2

Ilija Zeljkovic, Dennis Huang, Can Li Song, Bing Lv, Ching Wu Chu, Jennifer E. Hoffman

研究成果: Article同行評審

26 引文 斯高帕斯(Scopus)

摘要

We use scanning tunneling microscopy to determine the surface structure and dopant distribution in PrxCa1-xFe2As 2, the highest-Tc member of the 122 family of iron-based superconductors. We identify the cleaved surface termination by mapping the local tunneling barrier height, related to the work function. We image the individual Pr dopants responsible for superconductivity, and show that they do not cluster, but in fact repel each other at short length scales. We therefore suggest that the low volume fraction high-Tc superconducting phase is unlikely to originate from Pr inhomogeneity.

原文English
文章編號201108
期刊Physical Review B - Condensed Matter and Materials Physics
87
發行號20
DOIs
出版狀態Published - 2013 5月 17

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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