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Title: Isotope effect on electron-phonon interaction in the multiband superconductor MgB 2

Abstract

We investigate the effect of isotope substitution on the electron-phonon interaction in the multiband superconductor MgB 2 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 Mg 10B 2 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.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1257374
Alternate Identifier(s):
OSTI ID: 1246187
Report Number(s):
IS-J-8970
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 14; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Mou, Daixiang, Manni, Soham, Taufour, Valentin, Wu, Yun, Huang, Lunan, Bud'ko, S. L., Canfield, P. C., and Kaminski, Adam. Isotope effect on electron-phonon interaction in the multiband superconductor MgB2. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.144504.
Mou, Daixiang, Manni, Soham, Taufour, Valentin, Wu, Yun, Huang, Lunan, Bud'ko, S. L., Canfield, P. C., & Kaminski, Adam. Isotope effect on electron-phonon interaction in the multiband superconductor MgB2. United States. doi:10.1103/PhysRevB.93.144504.
Mou, Daixiang, Manni, Soham, Taufour, Valentin, Wu, Yun, Huang, Lunan, Bud'ko, S. L., Canfield, P. C., and Kaminski, Adam. Thu . "Isotope effect on electron-phonon interaction in the multiband superconductor MgB2". United States. doi:10.1103/PhysRevB.93.144504. https://www.osti.gov/servlets/purl/1257374.
@article{osti_1257374,
title = {Isotope effect on electron-phonon interaction in the multiband superconductor MgB2},
author = {Mou, Daixiang and Manni, Soham and Taufour, Valentin and Wu, Yun and Huang, Lunan and Bud'ko, S. L. and Canfield, P. C. and Kaminski, Adam},
abstractNote = {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. 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.},
doi = {10.1103/PhysRevB.93.144504},
journal = {Physical Review B},
number = 14,
volume = 93,
place = {United States},
year = {2016},
month = {4}
}

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    Works referencing / citing this record:

    A Hydride Route to Ternary Alkali Metal Borides: A Case Study of Lithium Nickel Borides
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    A Hydride Route to Ternary Alkali Metal Borides: A Case Study of Lithium Nickel Borides
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