Electron-phonon coupling induced pseudogap and the superconducting transition in Ba0.67K0.33BiO3

Ashish Atma Chainani, T. Yokoya, T. Kiss, S. Shin, T. Nishio, H. Uwe

研究成果: Article同行評審

26 引文 斯高帕斯(Scopus)

摘要

We study the single-particle density of states (DOS) across the superconducting transition (Tc=31 K) in single-crystal Ba0.67K0.33BiO3 using ultrahigh resolution angle-integrated photoemission spectroscopy. The superconducting gap opens with a pileup in the DOS, Δ(5.3 K) = 5.2 meV and 2Δ(0)/kBTc = 3.9. In addition, we observe a pseudogap below and above Tc, occurring as a suppression in intensity over an energy scale up to the breathing mode phonon (∼70 meV). The results indicate electron-phonon coupling induces a pseudogap in Ba0.67K0.33BiO3.

原文English
文章編號180509
頁(從 - 到)1805091-1805094
頁數4
期刊Physical Review B - Condensed Matter and Materials Physics
64
發行號18
出版狀態Published - 2001 十一月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

指紋

深入研究「Electron-phonon coupling induced pseudogap and the superconducting transition in Ba<sub>0.67</sub>K<sub>0.33</sub>BiO<sub>3</sub>」主題。共同形成了獨特的指紋。

引用此