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  Anisotropic Energy Gaps of Iron-Based Superconductivity from Intraband Quasiparticle Interference in LiFeAs

Allan, M. P., Rost, A. W., Mackenzie, A. P., Xie, Y., Davis, J. C., Kihou, K., et al. (2012). Anisotropic Energy Gaps of Iron-Based Superconductivity from Intraband Quasiparticle Interference in LiFeAs. Science, 336(6081), 563-567. doi:10.1126/science.1218726.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F2BA-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F2BC-F
Genre: Journal Article

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 Creators:
Allan, M. P.1, Author
Rost, A. W.1, Author
Mackenzie, A. P.2, Author              
Xie, Yang1, Author
Davis, J. C.1, Author
Kihou, K.1, Author
Lee, C. H.1, Author
Iyo, A.1, Author
Eisaki, H.1, Author
Chuang, T. -M.1, Author
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: If strong electron-electron interactions between neighboring Fe atoms mediate the Cooper pairing in iron-pnictide superconductors, then specific and distinct anisotropic superconducting energy gaps Delta(i)((k) over right arrow) should appear on the different electronic bands i. Here, we introduce intraband Bogoliubov quasiparticle scattering interference (QPI) techniques for determination of Delta(i)((k) over right arrow) in such materials, focusing on lithium iron arsenide (LiFeAs). We identify the three hole-like bands assigned previously as gamma, alpha(2), and alpha(1), and we determine the anisotropy, magnitude, and relative orientations of their Delta(i)((k) over right arrow): These measurements will advance quantitative theoretical analysis of the mechanism of Cooper pairing in iron-based superconductivity.

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 Dates: 2012-05-04
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000303498800039
DOI: 10.1126/science.1218726
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Title: Science
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Association for the Advancement of Science
Pages: - Volume / Issue: 336 (6081) Sequence Number: - Start / End Page: 563 - 567 Identifier: ISSN: 0036-8075
CoNE: /journals/resource/991042748276600_1