CrSBr: An Air-Stable, Two-Dimensional Magnetic Semiconductor

Abstract

The discovery of magnetic order at the 2D limit has sparked new exploration of van der Waals magnets for potential use in spintronics, magnonics, and quantum information applications. However, many of these materials feature low magnetic ordering temperatures and poor air stability, limiting their fabrication into practical devices. In this Mini-Review, we present a promising material for fundamental studies and functional use: CrSBr, an air-stable, two-dimensional magnetic semiconductor. Our discussion highlights experimental research on bulk CrSBr, including quasi-1D semiconducting properties, A-type antiferromagnetic order (T N = 132 K), and strong coupling between its electronic and magnetic properties. We then discuss the behavior of monolayer and few-layer flakes and present a perspective on promising avenues for further studies on CrSBr.

Proximity-induced exchange interaction and prolonged valley lifetime in MoSe2/CrSBr van-der-Waals heterostructure with orthogonal spin-orbit fields

“…Recent studies on monolayer (ML) transition-metal dichalcogenides (TMDCs) and magnetic vdW materials have mostly concentrated on ferromagnetic materials with out-of-plane magnetization [1][2][3][4][5][6][7]. However, there are emergent vdW magnetic materials such as CrSBr, which has some particularly appealing properties [8]. In the bulk form, CrSBr represents electronically a quasi-one-dimensional semiconductor [9], and, the interlayer electronic coupling can be controlled by the layered magnetic order [10].…”

“…Bulk material is known to be an A-type antiferromagnet with a Neél temperature of 132 K [9][10][11][12][13][14][15][16][17], with easy and intermediate magnetic axes along b and â axes, respectively, and a hard axis along ĉ [18]. Another phase transition around T = 40 K was identified in CrSBr, which might be related to crystal defects [8,11] or spin-freezing effects [19]. Changes in the static magnetic configuration of CrSBr by application of a magnetic field directly impact the exciton energy.…”