铜酸盐
配对
凝聚态物理
反铁磁性
超导电性
费米面
角分辨光电子能谱
兴奋剂
物理
相图
带隙
电子
光电发射光谱学
材料科学
相(物质)
电子结构
核磁共振
量子力学
X射线光电子能谱
作者
Ke-Jun Xu,Jun-Feng He,Su-Di Chen,Yu He,Sebastien N. Abadi,C. R. Rotundu,Young S. Lee,Dong-Hui Lu,Qinda Guo,Oscar Tjernberg,Thomas Devereaux,Dung-Hai Lee,Makoto Hashimoto,Zhi‐Xun Shen
出处
期刊:Cornell University - arXiv
日期:2023-01-01
标识
DOI:10.48550/arxiv.2309.10208
摘要
In the underdoped n-type cuprate Nd2-xCexCuO4, long-ranged antiferromagnetic order reconstructs the Fermi surface, resulting in a putative antiferromagnetic metal with small pockets. Using angle-resolved photoemission spectroscopy, we observe an anomalous energy gap, an order of magnitude smaller than the antiferromagnetic gap, in a wide range of the underdoped regime and smoothly connecting to the superconducting gap at optimal doping. After carefully considering all the known ordering tendencies in tandem with the phase diagram, we hypothesize that the normal state gap in the underdoped n-type cuprates originates from Cooper pairing. The high temperature scale of the normal state gap raises the prospect of engineering higher transition temperatures in the n-type cuprates comparable to that of the p-type cuprates.
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