Anomalous normal-state gap in an electron-doped cuprate.
Science
; 385(6710): 796-800, 2024 Aug 16.
Article
em En
| MEDLINE
| ID: mdl-39146411
ABSTRACT
In the underdoped n-type cuprate Nd2-xCexCuO4, 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 than the antiferromagnetic gap, in a wide portion of the underdoped regime and smoothly connecting to the superconducting gap at optimal doping. After 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 those of the p-type cuprates.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
Science
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Estados Unidos