Anomalous normal-state gap in an electron-doped cuprate

• Published in: Science (American Association for the Advancement of Science) Vol. 385; no. 6710; pp. 796 - 800
• Main Authors: Xu, Ke-Jun, He, Junfeng, Chen, Su-Di, He, Yu, Abadi, Sebastien N, Rotundu, Costel R, Lee, Young S, Lu, Dong-Hui, Guo, Qinda, Tjernberg, Oscar, Devereaux, Thomas P, Lee, Dung-Hai, Hashimoto, Makoto, Shen, Zhi-Xun
• Format: Journal Article
• Language: English
• Published: United States The American Association for the Advancement of Science 16.08.2024; AAAS
• Subjects: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Copper oxides; Cuprates; Electrons; Energy gap; Phase diagrams; Photoelectric emission; Superconductivity; Transition temperatures

In the underdoped n-type cuprate Nd Ce CuO , long-range antiferromagnetic order reconstructs the Fermi surface, resulting in a putative antiferromagnetic metal with small Fermi pockets. Using angle-resolved photoemission spectroscopy, we observe an anomalous energy gap, an order of magnitude smaller...