학술논문
Antiferromagnetic metal phase in an electron-doped rare-earth nickelate
Document Type
Article
Author
Song, Qi; Doyle, Spencer; Pan, Grace A.; El Baggari, Ismail; Ferenc Segedin, Dan; Córdova Carrizales, Denisse; Nordlander, Johanna; Tzschaschel, Christian; Ehrets, James R.; Hasan, Zubia; El-Sherif, Hesham; Krishna, Jyoti; Hanson, Chase; LaBollita, Harrison; Bostwick, Aaron; Jozwiak, Chris; Rotenberg, Eli; Xu, Su-Yang; Lanzara, Alessandra; N’Diaye, Alpha T.; Heikes, Colin A.; Liu, Yaohua; Paik, Hanjong; Brooks, Charles M.; Pamuk, Betül; Heron, John T.; Shafer, Padraic; Ratcliff, William D.; Botana, Antia S.; Moreschini, Luca; Mundy, Julia A.
Source
Nature Physics; April 2023, Vol. 19 Issue: 4 p522-528, 7p
Subject
Language
ISSN
17452473; 17452481
Abstract
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 NdNiO3is known to be a non-collinear antiferromagnet in which the onset of antiferromagnetic ordering is concomitant with a transition to an insulating state. Here 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.