Author(s): Meng-Xue Guan, Xin-Bao Liu, Da-Qiang Chen, Xuan-Yi Li, Ying-Peng Qi, Qing Yang, Pei-Wei You, and Sheng Meng
The temporal characters of laser-driven phase transition from 2H to 1T′ has been investigated in the prototype MoTe2 monolayer. This process is found to be induced by fundamental electron-phonon interactions, with an unexpected phonon excitation and coupling pathway closely related to the nonequilib…
[Phys. Rev. Lett. 128, 015702] Published Mon Jan 03, 2022
Nature Materials, Published online: 30 December 2021; doi:10.1038/s41563-021-01169-y
Neutron scattering, electron spin resonance, muon spectroscopy and magnetization measurements are applied to evidence a quantum spin liquid phase in NdTa7O19.Author(s): S. D. Eder, S. K. Hellner, S. Forti, J. M. Nordbotten, J. R. Manson, C. Coletti, and B. Holst
The change in bending rigidity with temperature κ(T) for 2D materials is highly debated: theoretical works predict both increase and decrease. Here we present measurements of κ(T), for a 2D material: AB-stacked bilayer graphene. We obtain κ(T) from phonon dispersion curves measured with helium atom …
[Phys. Rev. Lett. 127, 266102] Published Thu Dec 23, 2021
Nature Electronics, Published online: 23 December 2021; doi:10.1038/s41928-021-00689-4
Wide-bandgap transistors with room-temperature hole mobility of 680 cm2 V−1 s−1 can be created without surface doping using hydrogen-terminated diamond/hexagonal boron nitride heterostructures.Nature Electronics, Published online: 23 December 2021; doi:10.1038/s41928-021-00685-8
Sulfur vacancies in monolayer molybdenum disulfide can be passivated using an oxygen-incorporated chemical vapour deposition technique, which results in less n-type doping, enhanced photoluminescence and decreased contact resistance compared with growth without oxygen.Nature Electronics, Published online: 23 December 2021; doi:10.1038/s41928-021-00695-6
By incorporating oxygen into the chemical vapour deposition growth of molybdenum disulfide, sulfur vacancies can be passivated and contact resistances lowered.
Nature Physics, Published online: 23 December 2021; doi:10.1038/s41567-021-01427-5
Exciton condensation has been observed in various three-dimensional (3D) materials. Now, monolayer WTe2—a 2D topological insulator—also shows the phenomenon. Strong electronic interactions allow the excitons to form and condense at high temperature.Nature Physics, Published online: 23 December 2021; doi:10.1038/s41567-021-01422-w
Insulating states that are formed because of pairing between electrons and holes are known to exist in engineered bilayer structures in high magnetic fields. Now evidence suggests they can occur in a monolayer crystal at zero field.Nature Photonics, Published online: 23 December 2021; doi:10.1038/s41566-021-00922-8
Researchers demonstrate the tuning of a plasmonic laser by magneto-optical effects. The results offer a new pathway for externally adjusting nanolasers.Nature Photonics, Published online: 23 December 2021; doi:10.1038/s41566-021-00908-6
Spatially and temporally resolved exciton diffusion experiments on a two-dimensional WSe2/hBN/MoSe2 heterostructure are reported, where an excitation-power-dependent exciton diffusion pattern is observed and phenomena with dipole–dipole repulsive interaction are quantitatively modelled.Nature Nanotechnology, Published online: 22 December 2021; doi:10.1038/s41565-021-01041-9
Flexible neural probes, consisting of a linear array of graphene microtransistors, can be used to record from DC brain signals to high-frequency neuronal activity in awake rodents, thus showing potential for in vivo electrophysiology, and in particular epilepsy research.Nature Materials, Published online: 23 December 2021; doi:10.1038/s41563-021-01112-1
Heterogeneous microscale contacts between molybdenum disulfide and graphene or hexagonal boron nitride layers demonstrate ultralow friction independent of their relative orientation with residual drag that originates from edge effects.Nature Materials, Published online: 23 December 2021; doi:10.1038/s41563-021-01117-w
A double-layer borophene — a boron analogue of the double-layer graphene — has been synthesized, expanding the phase space and potential applications of two-dimensional boron.Nature Chemistry, Published online: 23 December 2021; doi:10.1038/s41557-021-00868-y
Bilayer borophene, predicted to be stabilized by interlayer linkages, has now been grown by molecular beam epitaxy on copper and silver surfaces in two independent studies. The growth substrate and temperature are found to influence the lattice structures formed.