Ultra-high resolution photoemission spectroscopy of simple metals: Direct observation of superconducting gap and phonon-induced fine structures

T. Kiss, T. Yokoya, A. Chainani, S. Shin

研究成果: Conference article

3 引文 斯高帕斯(Scopus)

摘要

We have performed ultra-high resolution photoemission spectroscopy of simple metals, Nb (Tc = 9.26 K) and Pb (Tc = 7.19 K) in order to study the changes in the density of states across the transition temperatures. The spectra of both compounds measured at 5.3 K show an opening of the superconducting gap accompanied by a leading-edge shift and an appearance of a sharp peak just below the Fermi level. Furthermore, the Pb spectrum clearly shows peak-dip-hump structures due to strong electron-phonon coupling, as seen in the high-Tc cuprates. This makes it a characteristic of strong-coupling superconductivity.

原文English
頁(從 - 到)635-639
頁數5
期刊Journal of Electron Spectroscopy and Related Phenomena
114-116
DOIs
出版狀態Published - 2001 三月
事件8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA
持續時間: 2000 八月 82000 八月 12

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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