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Nodeless superconducting phase arising from a strong (π, π) antiferromagnetic phase in the infinite-layer electron-doped sr 1-xlaxcuo2 compound

Cornell Affiliated Author(s)

Author

J.W. Harter
L. Maritato
D.E. Shai
E.J. Monkman
Y. Nie
D.G. Schlom
K.M. Shen

Abstract

The asymmetry between electron and hole doping remains one of the central issues in high-temperature cuprate superconductivity, but our understanding of the electron-doped cuprates has been hampered by apparent discrepancies between the only two known families: Re2-xCexCuO4 and A1-xLaxCuO2. Here we report in situ angle-resolved photoemission spectroscopy measurements of epitaxially stabilized Sr1-xLaxCuO2 thin films synthesized by oxide molecular-beam epitaxy. Our results reveal a strong coupling between electrons and (π, π) antiferromagnetism that induces a Fermi surface reconstruction which pushes the nodal states below the Fermi level. This removes the hole pocket near (π/2, π/2), realizing nodeless superconductivity without requiring a change in the symmetry of the order parameter and providing a universal understanding of all electron-doped cuprates. © 2012 American Physical Society.

Date Published

Journal

Physical Review Letters

Volume

109

Issue

26

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84871787714&doi=10.1103%2fPhysRevLett.109.267001&partnerID=40&md5=6155ce04b552dc0f403201de4bbf34db

DOI

10.1103/PhysRevLett.109.267001

Group (Lab)

Kyle Shen Group

Funding Source

1120296

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