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

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)635-639
Number of pages5
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume114-116
DOIs
Publication statusPublished - Mar 2001
Externally publishedYes
Event8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA
Duration: Aug 8 2000Aug 12 2000

ASJC Scopus subject areas

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

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