Superconducting gap of MgB2 observed using ultrahigh-resolution photoemission spectroscopy

Shunsuke Tsuda, Takayoshi Yokoya, Takayuki Kiss, Ashish Chainani, Yoshihiko Takano, Kazumasa Togano, Hijiri Kito, Hideo Ihara, Shik Shin

研究成果: Conference article同行評審

2 引文 斯高帕斯(Scopus)

摘要

We study the superconducting gap of MgB2 using high-resolution photoemission. In the spectrum measured at 5.4 K, a coherent peak with a shoulder structure is observed. We find that a simulation using two Dynes functions with the gap sizes of 1.7 and 5.6 meV reproduces the superconducting-state spectrum better than that using a single Dynes function and anisotropic Dynes functions. We also find that both of the smaller and larger gap close at the bulk transition temperature. These results indicate a multiple superconducting gap of MgB2.

原文English
頁(從 - 到)150-151
頁數2
期刊Physica B: Condensed Matter
312-313
DOIs
出版狀態Published - 2002 三月
事件International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States
持續時間: 2002 八月 62002 八月 6

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 電氣與電子工程

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