Campus Units

Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

4-1-2016

Journal or Book Title

Physical Review B

Volume

93

Issue

14

First Page

144504

DOI

10.1103/PhysRevB.93.144504

Abstract

We investigate the effect of isotope substitution on the electron-phonon interaction in the multiband superconductor MgB2 using tunable laser-based angle-resolved photoemission spectroscopy. The kink structure around 70 meV in the σ band, which is caused by electron coupling to the E2g phonon mode, is shifted to higher binding energy by ∼3.5 meV in Mg10B2 and the shift is not affected by superconducting transition. These results serve as the benchmark for investigations of isotope effects in known, unconventional superconductors and newly discovered superconductors where the origin of pairing is unknown.

Comments

This article is published as Mou, Daixiang, Soham Manni, Valentin Taufour, Yun Wu, Lunan Huang, S. L. Bud'ko, P. C. Canfield, and Adam Kaminski. "Isotope effect on electron-phonon interaction in the multiband superconductor MgB2." Physical Review B 93, no. 14 (2016): 144504. DOI: 10.1103/PhysRevB.93.144504. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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