| Autor: |
John W, Harter, Luigi, Maritato, Daniel E, Shai, Eric J, Monkman, Yuefeng, Nie, Darrell G, Schlom, Kyle M, Shen |
| Rok vydání: |
2012 |
| Zdroj: |
Physical review letters. 109(26) |
| ISSN: |
1079-7114 |
| Popis: |
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: Re(2-x)Ce(x)CuO4 and A(1-x)La(x)CuO2. Here we report in situ angle-resolved photoemission spectroscopy measurements of epitaxially stabilized Sr(1-x)La(x)CuO2 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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