A magnetic semiconductor that, unusually, survives in air and orders at a comparatively high temperature. Each layer is a ferromagnet with its spins along one in-plane direction, and neighbouring layers point opposite ways. Its light emission is tied to its magnetism, so magnetic order can be read out optically, and its electrons behave almost one-dimensionally – one of the most unusual members of the 2D family.
They are coordination polyhedra. Only complete ones are drawn.
Three layers of bulk CrSBr. Each layer sits directly over the one below, so a single layer is the whole repeat: c = 7.94 Å. Below about 132 K the moments line up within each layer and point opposite ways in neighbouring layers. Cell at 160 K from López-Paz and colleagues, Nature Communications 13, 4745 (2022).
Readiness runs lab → prototype → pilot → deployed.
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Triaxial magnetic anisotropy (easy b, intermediate a, hard c) and strongly anisotropic excitons require models beyond isotropic Heisenberg magnets and hydrogenic excitons; GW–BSE shows exciton character depending on the interlayer magnetic configuration. Exchange constants from DFT+U vary with U, so benchmark against measured magnon spectra.
Flakes cleave into elongated shapes along the b-axis; confirm with polarised Raman or PL, since the excitons are b-polarised. Magnetic order shows up in magnetoresistance, second-harmonic generation and exciton energy shifts. Its air stability allows standard lithography with modest precautions.
One of the more practical van der Waals magnets thanks to its air stability, but ordering temperatures of ~130–150 K still demand cooling.
The newest items tagged CrSBr, from the news feed updated 5 Oct 2026.
Spin correlations govern numerous collective behaviors of quantum materials, underpinning exotic phenomena such as unconventional superconductivity and topological magnetism. In layered materials, the interlayer spin correlation is important because it characterizes the magnetic ground state and determines spin…
Among the recently discovered layered magnetic materials, the antiferromagnet CrSBr has attracted considerable interest thanks to its stability, quasi-one-dimensional crystal structure, and direct near-infrared band gap. These properties make it a suitable platform for combined electrical, magnetic, and optical…
Two-dimensional magnetic semiconductors provide a unique platform for exploring the interplay between charge, lattice, spin, and light. The strong Coulomb interaction combined with long-range magnetic order enables efficient coupling between excitons and both lattice vibrations and spin excitations, thereby strongly…
Magnetic anisotropy is crucial for sustaining long range magnetic order in two-dimensional materials (2D) and must be taken into account by any approximate scheme for calculating critical temperatures. Despite the huge interest in 2D magnetic materials, a general and reliable method for calculating the critical…
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