jinzhitong

Several Ising-type magnetic van der Waals (vdW) materials exhibit stable magnetic ground states. Despite these clear experimental demonstrations, a complete theoretical and microscopic understanding of their magnetic anisotropy is still lacking. In particular, the validity limit of identifying their one-dimensional Ising nature has remained uninvestigated in a quantitative way. Here we performed the complete mapping of magnetic anisotropy for a prototypical Ising vdW magnet FePS 3 for the first time. Combining torque magnetometry measurements with their magnetostatic model analysis and the relativistic density functional total energy calculations, we successfully constructed the three-dimensional mappings of the magnetic anisotropy in terms of magnetic torque and energy. The results not only quantitatively confirm that the easy axis is perpendicular to the ab plane, but also reveal the anisotropies within the ab, ac , and bc planes. Our approach can...

Author(s): Beicheng Lou, Nathan Zhao, Momchil Minkov, Cheng Guo, Meir Orenstein, and Shanhui Fan

A numerical technique enables the computational study of twisted photonic structures.

[Phys. Rev. Lett. 126, 136101] Published Wed Mar 31, 2021

Nature Electronics, Published online: 05 April 2021; doi:10.1038/s41928-021-00561-5

Bilayer beta tellurium dioxide nanosheets with p-type characteristics can be formed through the surface oxidation of a mixture of tellurium and selenium, and used to create transistors with performance that matches their n-type oxide counterparts.

Nature Physics, Published online: 01 April 2021; doi:10.1038/s41567-021-01208-0

A terahertz spectroscopic study of the quasi-one-dimensional ferromagnet CoNb2O6 reveals bond-dependent interactions in this material that are similar to those of a one-dimensional version of the honeycomb Kitaev spin liquid.

Nature Materials, Published online: 01 April 2021; doi:10.1038/s41563-021-00952-1

Bright hot plasmon emission is observed in graphene due to the ultrafast relaxation of hot carriers that were excited by femtosecond laser pulses of visible light.

Nature Materials, Published online: 06 April 2021; doi:10.1038/s41563-021-00998-1

Publisher Correction: Phonon renormalization in reconstructed MoS₂ moiré superlattices

Nature Chemistry, Published online: 05 April 2021; doi:10.1038/s41557-021-00657-7

State-of-the-art industrial methods for transforming P4 into useful phosphorus compounds currently rely on indirect, multi-step strategies. It has now been shown that straightforward one-pot reactions can convert P4 directly into industrially relevant products while requiring only mild conditions and simple, inexpensive reagents—and can also functionalize P4 catalytically.

Nature, Published online: 07 April 2021; doi:10.1038/d41586-021-00843-0

Electrons usually move more freely at higher temperatures. But they have now been observed to ‘freeze’ as the temperature rises, in a system consisting of two stacked, but slightly misaligned, graphene sheets.

Nature, Published online: 07 April 2021; doi:10.1038/s41586-021-03409-2

An electronic analogue of the Pomeranchuk effect is present in twisted bilayer graphene, shown by the stability of entropy in a ferromagnetic phase compared to an unpolarized Fermi liquid phase at certain high temperatures.

Nature, Published online: 07 April 2021; doi:10.1038/s41586-021-03319-3

Magic-angle graphene is found to have an exotic phase transition where, on heating, entropy is transferred from motional to magnetic degrees of freedom, analogously to the Pomeranchuk effect in 3He.

Nature Nanotechnology, Published online: 29 March 2021; doi:10.1038/s41565-021-00890-8

Near-field optical microscopy reveals unique nanoscale domain structures of Moiré patterns in minimally twisted bilayer graphene via the photothermoelectric effect.

Nature Materials, Published online: 01 April 2021; doi:10.1038/s41563-021-00935-2

The optical emission of graphene under pumping with femtosecond laser pulses contains a strong component linked to plasmon emission from the hot electrons in the system.

Nature, Published online: 31 March 2021; doi:10.1038/s41586-021-03366-w

Chemical potential measurements in twisted bilayer graphene reveal the importance of Coulomb repulsion and exchange interactions in the symmetry-broken ground state, and provide the charge diffusivity in the strange-metal regime.