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Title: Antiferromagnetic metal phase in an electron-doped rare-earth nickelate

Journal Article · · Nature Physics
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  1. Harvard Univ., Cambridge, MA (United States)
  2. Arizona State Univ., Tempe, AZ (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; National Inst. of Standards and Technology (NIST) and Univ. of Maryland, Gaithersburg, MD (United States). Joint Quantum Institute
  6. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Second Target Station
  7. Cornell Univ., Ithaca, NY (United States); Univ. of Oklahoma, Norman, OK (United States)
  8. Cornell Univ., Ithaca, NY (United States)
  9. Univ. of Michigan, Ann Arbor, MI (United States)
  10. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Univ. of Maryland, College Park, MD (United States)

Long viewed as passive elements, antiferromagnetic materials have emerged as promising candidates for spintronic devices due to their insensitivity to external fields and potential for high-speed switching. Recent work exploiting spin and orbital effects has identified ways to electrically control and probe the spins in metallic antiferromagnets, especially in non-collinear or non-centrosymmetric spin structures. The rare-earth nickelate NdNiO3 is known to be a non-collinear antiferromagnet in which the onset of antiferromagnetic ordering is concomitant with a transition to an insulating state. In this work, we find that for low electron doping, the magnetic order on the nickel site is preserved, whereas electronically, a new metallic phase is induced. We show that this metallic phase has a Fermi surface that is mostly gapped by an electronic reconstruction driven by bond disproportionation. Furthermore, we demonstrate the ability to write to and read from the spin structure via a large zero-field planar Hall effect. Our results expand the already rich phase diagram of rare-earth nickelates and may enable spintronics applications in this family of correlated oxides.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231; DMR-1231319; DMR-2039380; DGE-1745303; DMR-2045826
OSTI ID:
1961949
Journal Information:
Nature Physics, Vol. 19, Issue 4; ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)Copyright Statement
Country of Publication:
United States
Language:
English

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