| Autor: |
Allan MP; Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA., Rost AW, Mackenzie AP, Xie Y, Davis JC, Kihou K, Lee CH, Iyo A, Eisaki H, Chuang TM |
| Jazyk: |
angličtina |
| Zdroj: |
Science (New York, N.Y.) [Science] 2012 May 04; Vol. 336 (6081), pp. 563-7. |
| DOI: |
10.1126/science.1218726 |
| Abstrakt: |
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 Δ(i)(k) should appear on the different electronic bands i. Here, we introduce intraband Bogoliubov quasiparticle scattering interference (QPI) techniques for determination of Δ(i)(k) in such materials, focusing on lithium iron arsenide (LiFeAs). We identify the three hole-like bands assigned previously as γ, α(2), and α(1), and we determine the anisotropy, magnitude, and relative orientations of their Δ(i)(k). These measurements will advance quantitative theoretical analysis of the mechanism of Cooper pairing in iron-based superconductivity. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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