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Ultra-high Resolution Photoemission Spectroscopy of Simple Metals: Direct Observation of Superconducting Gap and Phonon-induced Fine Structures by T. Kiss; T. Yokoya; A. Chainani; S. Shin is a Physics and Astronomy article available to read on EtoBox.

What is Ultra-high Resolution Photoemission Spectroscopy of Simple Metals: Direct Observation of Superconducting Gap and Phonon-induced Fine Structures about?

We have performed ultra-high resolution photoemission spectroscopy of simple metals, Nb (T 59.26 K) and Pb (T 57.19 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-T cuprates. This makes it a characteristic of strong-coupling superconductivic ty.

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Author

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

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0368-2048)

Published

2001

Language

EN

Field

Physics and Astronomy (Physical Sciences)