Isotope effect on electron-phonon interaction in the multiband superconductor MgB2

Mou, Daixiang; Manni, Soham; Taufour, Valentin; Wu, Yun; Huang, Lunan; Bud'ko, S. L.; Canfield, P. C.; Kaminski, Adam

doi:10.1103/PhysRevB.93.144504

Title: Isotope effect on electron-phonon interaction in the multiband superconductor ${MgB}_{2}$

Journal Article · Thu Apr 07 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.93.144504· OSTI ID:1257374

Mou, Daixiang ^[1]; Manni, Soham ^[1]; Taufour, Valentin ^[1]; Wu, Yun ^[1]; Huang, Lunan ^[1]; Bud'ko, S. L. ^[1]; Canfield, P. C. ^[1]; Kaminski, Adam ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)

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 E_2g phonon mode, is shifted to higher binding energy by ~3.5 meV in Mg¹⁰B₂ and the shift is not affected by superconducting transition. Furthermore, 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.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1257374

Alternate ID(s):: OSTI ID: 1246187

Report Number(s):: IS-J-8970; PRBMDO

Journal Information:: Physical Review B, Vol. 93, Issue 14; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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References (34)

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A Hydride Route to Ternary Alkali Metal Borides: A Case Study of Lithium Nickel Borides Gvozdetskyi, Volodymyr; Hanrahan, Michael P.; Ribeiro, Raquel A. Chemistry – A European Journal, Vol. 25, Issue 16 https://doi.org/10.1002/chem.201805398	journal	February 2019
Self-Consistent Two-Gap Description of MgB2 Superconductor Kim, Hyunsoo; Cho, Kyuil; Tanatar, Makariy A. Symmetry, Vol. 11, Issue 8 https://doi.org/10.3390/sym11081012	journal	August 2019

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