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 - 2001 Mar
Event8th International Conference on Electronic Spectroscopy and Structure (ICESS-8) - Berkeley, CA, USA
Duration: 2000 Aug 82000 Aug 12

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Photoelectron spectroscopy
Superconductivity
Fermi level
Superconducting transition temperature
photoelectric emission
Metals
fine structure
Electrons
high resolution
leading edges
metals
spectroscopy
cuprates
superconductivity
transition temperature
shift
electrons

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

Cite this

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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.",
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T1 - Ultra-high resolution photoemission spectroscopy of simple metals

T2 - Direct observation of superconducting gap and phonon-induced fine structures

AU - Kiss, T.

AU - Yokoya, T.

AU - Chainani, A.

AU - Shin, S.

PY - 2001/3

Y1 - 2001/3

N2 - 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.

AB - 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.

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VL - 114-116

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JO - Journal of Electron Spectroscopy and Related Phenomena

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