Multifunctional antiferromagnetic materials with giant piezomagnetism and noncollinear spin current
Year: 2021
Type: article
Abstract: We propose a new type of spin-valley locking (SVL), named C-paired SVL, in antiferromagnetic systems, which directly connects the spin/valley space with the real space, and hence enables both static and dynamical controls of spin and valley to realize a multifunctional antiferromagnetic material. The new emergent quantum degree of freedom in the C-paired SVL is comprised of spin-polarized valleys related by a crystal symmetry instead of the time-reversal symmetry. Thus, both spin and valley can be accessed by simply breaking the corresponding crystal symmetry. Typically, one can use a strain field to induce a large net valley polarization/magnetization and use a charge current to generate a large noncollinear spin current. We predict the realization of the C-paired SVL in monolayer V2Se2O, which indeed exhibits giant piezomagnetism and can generate a large transverse spin current. Our findings provide unprecedented opportunities to integrate various controls of spin and valley with nonvolatile information storage in a single material, which is highly desirable for versatile fundamental research and device applications.
Source: Nature Communications
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,560
Awards: 单晶超薄薄膜高温超导特性的原位调控与研究, Develop new methods for pure fermion lattice models in the framework of self-learning Monte Carlo method, G1849260018, G1946695276, G2155295301, G2207696174, G2614825196, G2735571122, G28403681, G2903135303, G3031336324, Novel electronic and magnetic properties induced by confinement effect on topological nontrivial antiperovskites, G355362570, G3736159624, G3772364373, G4702068571, 锯齿型石墨烯纳米带电子和自旋性质的实验研究, G5653880824, G5799778544, 人造拓扑超导体与Majorana费米子的研究, 外尔半金属的拓扑表面电子态研究, 界面超导体电学磁学特性的原位测量与研究, 结构原子级精确的石墨烯纳米带的可控制备及其电磁性质研究, G920057190
OpenAlex ID: W3136985514