Title: Ferromagnetic order beyond the superconducting dome in a cuprate superconductor

Abstract

According to conventional wisdom, the extraordinary properties of the cuprate high-temperature superconductors arise from doping a strongly correlated antiferromagnetic insulator. The highly overdoped cuprates—whose doping lies beyond the dome of superconductivity—are considered to be conventional Fermi liquid metals. We report the emergence of itinerant ferromagnetic order below 4 kelvin for doping beyond the superconducting dome in thin films of electron-doped La _{2– x} Ce _x CuO ₄ (LCCO). The existence of this ferromagnetic order is evidenced by negative, anisotropic, and hysteretic magnetoresistance, hysteretic magnetization, and the polar Kerr effect, all of which are standard signatures of itinerant ferromagnetism in metals. This surprising result suggests that the overdoped cuprates are strongly influenced by electron correlations.

Authors:

Sarkar, Tarapada  ^[1];

• Search DOE PAGES for author "Sarkar, Tarapada"
• Search DOE PAGES for ORCID "0000-0002-4204-4250"

Wei, D. S.  ^[2];

• Search DOE PAGES for author "Wei, D. S."
• Search DOE PAGES for ORCID "0000-0002-6753-3413"

Zhang, J.  ^[3];

• Search DOE PAGES for author "Zhang, J."
• Search DOE PAGES for ORCID "0000-0003-2775-1747"

Poniatowski, N. R. ^[1]; Mandal, P. R. ^[1]; Kapitulnik, A.  ^[4];

• Search DOE PAGES for author "Kapitulnik, A."
• Search DOE PAGES for ORCID "0000-0002-2569-3582"

Greene, Richard L.  ^[1]

• Search DOE PAGES for author "Greene, Richard L."
• Search DOE PAGES for ORCID "0000-0002-7207-0943"

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+ Show Author Affiliations

1. Maryland Quantum Materials Center and Department of Physics, University of Maryland, College Park, MD 20742, USA.
2. Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA., Department of Applied Physics, Stanford University, Stanford, CA 94305, USA.
3. State Key Laboratory of Surface Physics, Department of Physics, Fudan University, Shanghai 200433, People’s Republic of China.
4. Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA., Department of Applied Physics, Stanford University, Stanford, CA 94305, USA., Department of Physics, Stanford University, Stanford, CA 94305, USA., Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.

Publication Date:

Thu Apr 30 00:00:00 EDT 2020

Research Org.:

SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1616651

Alternate Identifier(s):

OSTI ID: 1633186

Grant/Contract Number:  

AC02-76SF00515; DMR-1708334; FA9550-14-10332; GBMF5305

Resource Type:

Published Article

Journal Name:

Science

Additional Journal Information:

Journal Name: Science Journal Volume: 368 Journal Issue: 6490; Journal ID: ISSN 0036-8075

Publisher:

American Association for the Advancement of Science (AAAS)

Country of Publication:

United States

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY