Anomalous normal-state gap in an electron-doped cuprate-Reference-Cited by-同舟云学术

Anomalous normal-state gap in an electron-doped cuprate

Published:2024-08-16 Issue:6710 Volume:385 Page:796-800
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Xu Ke-Jun¹²³^ORCID,He Junfeng¹²⁴^ORCID,Chen Su-Di¹²³⁵^ORCID,He Yu⁶^ORCID,Abadi Sebastien N.¹²⁷^ORCID,Rotundu Costel R.¹²,Lee Young S.¹²³^ORCID,Lu Dong-Hui⁸^ORCID,Guo Qinda⁹^ORCID,Tjernberg Oscar⁹^ORCID,Devereaux Thomas P.¹²¹⁰^ORCID,Lee Dung-Hai⁵¹¹^ORCID,Hashimoto Makoto⁸^ORCID,Shen Zhi-Xun¹²³⁷^ORCID

Affiliation:

1. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA.

2. Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA.

3. Department of Applied Physics, Stanford University, Stanford, CA 94305, USA.

4. Department of Physics and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.

5. Department of Physics, University of California, Berkeley, CA 94720, USA.

6. Department of Applied Physics, Yale University, New Haven, CT 06511, USA.

7. Department of Physics, Stanford University, Stanford, CA 94305, USA.

8. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.

9. Department of Applied Physics, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, 114 19 Stockholm, Sweden.

10. Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.

11. Material Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Abstract

In the underdoped n-type cuprate Nd 2- x Ce x CuO 4 , 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.

Publisher

American Association for the Advancement of Science (AAAS)

Link

https://www.science.org/doi/pdf/10.1126/science.adk4792

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