Nodeless Superconducting Phase Arising from a Strong (π, π) Antiferromagnetic Phase in the Infinite- Layer Electron- Doped Sr1-xLaxCuO2 Compound

被引：50
作者：
Harter, John W. [1 ]
Maritato, Luigi [2 ,3 ,4 ]
Shai, Daniel E. [1 ]
Monkman, Eric J. [1 ]
Nie, Yuefeng [1 ,2 ]
Schlom, Darrell G. [2 ,5 ]
Shen, Kyle M. [1 ,5 ]
机构：
[1] Cornell Univ, Dept Phys, Lab Atom & Solid State Phys, Ithaca, NY 14853 USA
[2] Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA
[3] Univ Salerno, Ingn Elettr Matemat Applicata DIEM, Dipartimento Ingn Informaz, I-84084 Salerno, Italy
[4] CNR SPIN, I-84084 Salerno, Italy
[5] Kavli Inst Cornell Nanoscale Sci, Ithaca, NY 14853 USA
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 26期
基金：
加拿大自然科学与工程研究理事会; 美国国家科学基金会;
关键词：
TEMPERATURE SUPERCONDUCTOR; SYMMETRY;
D O I：
10.1103/PhysRevLett.109.267001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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 A(1-x)La(x)CuO(2). 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 (pi, pi) antiferromagnetism that induces a Fermi surface reconstruction which pushes the nodal states below the Fermi level. This removes the hole pocket near (pi/2, pi/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. DOI: 10.1103/PhysRevLett.109.267001
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页数：5
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