Authors
Jinxiong Jia, Longjun Xiang, Zhenhua Qiao, Jian Wang
Published in
Physical review letters. Volume 136. Issue 22. Pages 226302. Jun 05, 2026.
Abstract
The generation of spin magnetization by linear and nonlinear Edelstein effects has so far relied solely on electric fields. Here, we propose a distinct mechanism, the nonlinear magnetoelectric Edelstein effect (NMEE), in which electric and magnetic fields act cooperatively to produce spin magnetization. The NMEE comprises intrinsic and extrinsic components, both of quantum geometric origin, arising, respectively, from the spin-space Berry curvature dipole and the spin-space quantum metric dipole. Through symmetry analysis, we demonstrate that these two components play complementary roles: the intrinsic NMEE induces a Néel spin-orbit torque, whereas the extrinsic NMEE enables detection of Néel-vector reversal in PT-symmetric antiferromagnets, exemplified by CuMnAs. Moreover, the intrinsic NMEE persists even in insulating systems, as shown in the Kane-Mele model. Our findings establish a quantum-geometric route to manipulate and probe magnetic order, opening new directions for antiferromagnetic spintronics.
PMID:
42330455
Bibliographic data and abstract were imported from PubMed on 23 Jun 2026.
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