jinzhitong

The structures and electronic properties of InTe/graphene van der Waals heterostructures are systematically investigated using the first-principles calculations. The electronic properties of InTe monolayer and graphene are well preserved respectively and the bandgap energy of graphene is opened to 36.5 meV in the InTe/graphene heterostructure. An n-type Schottky contact is formed in InTe/graphene heterostructure at the equilibrium state. There is a transformation between n-type and p-type Schottky contact when the interlayer distance is smaller than 3.56 Å or the applied electric field is larger than −0.06 V Å −1 . In addition, the Schottky contact converts to Ohmic contact when the applied vertical electric field is larger than 0.11 V Å −1 or smaller than −0.13 V Å −1 .

In this work, combining first-principles calculation and the phonon Boltzmann transport equation, we explored the diffusive thermal conductivity of diamond-like bi-layer graphene. The converged iterative solution provides high room temperature thermal conductivity of 2034 W mK −1 , significantly higher than other 2D materials. More interesting, the thermal conductivity calculated by relaxation time approximation is about 33% underestimated, revealing a remarkable phonon hydrodynamic transport characteristic. Significant strain dependence is reported, for example, under 5% tensile strain, room temperature thermal conductivity (1081 W mK −1 ) of only about 50% of the strain-free sample, and under 20% strain, it reduces dramatically to only about 11% of the intrinsic one (226 W mK −1 ). Unexpectedly, in addition to the remarkable reduction in the absolute value of thermal conductivity, tensile strain can impact the hydrodynamic significance. For example, ...

Nature Materials, Published online: 08 June 2020; doi:10.1038/s41563-020-0706-8

The development of a magneto-optical imaging technique enables the real-time imaging and control of critical magnetic fluctuations in the single-layer ferromagnetic insulator CrBr3.

Nature, Published online: 11 June 2020; doi:10.1038/s41586-020-2373-y

Local electronic compressibility measurements of magic-angle twisted bilayer graphene show that the insulating and superconducting phases of this system are both derived from a high-energy symmetry-broken state.

Nature, Published online: 11 June 2020; doi:10.1038/s41586-020-2359-9

The photonic dispersion of phonon polaritons in bilayers of α-phase molybdenum trioxide can undergo tunable topological transitions at magic interlayer twist angles.

Author(s): Fan Yang, Shao-Jian Jiang, and Fei Zhou

We study effects of quantum fluctuations on two-dimensional p+ip superfluids near resonance. In the standard paradigm, phase transitions between superfluids and zero density vacuum are continuous. When strong quantum fluctuations near resonance are present, the line of continuous phase transitions t...

[Phys. Rev. Lett. 124, 225701] Published Fri Jun 05, 2020

Nature Photonics, Published online: 01 June 2020; doi:10.1038/s41566-020-0644-7

Owing to the superlattice-induced bandgap and superlattice-enhanced density of states, small-twist-angled (<2°) bilayer graphene exhibits a strong gate-tunable photoresponse in the mid-infrared regime of 5 to 12 μm, reaching an extrinsic peak responsivity of 26 mA W−1 at 12 μm.

Nature Physics, Published online: 01 June 2020; doi:10.1038/s41567-020-0928-3

Here, it is shown that superconductivity can exist without correlated insulating states in twisted bilayer graphene devices a little away from the magic angle. This indicates the two phases compete with each other, in contrast to previous claims.

Nature Nanotechnology, Published online: 25 May 2020; doi:10.1038/s41565-020-0695-4

Super-resolution microscopy of defects in a two-dimensional material unveils the transport of single proton charges at solid/water interfaces.

Nature Nanotechnology, Published online: 25 May 2020; doi:10.1038/s41565-020-0682-9

Lattice reconstruction in twisted transition metal dichalcogenides manifest in intrinsic asymmetry of electronic wavefunctions for 3R homo-bilayers and strong piezoelectric textures in 2H homo-bilayers.

Nature Physics, Published online: 25 May 2020; doi:10.1038/s41567-020-0910-0

A careful study of quantum oscillations of single crystals of the cuprate superconductor YBCO placed under a magnetic field reveals a sawtooth behaviour that is reminiscent of two-dimensional electronic systems—in turn suggesting the existence of a so-called ‘hard antinodal gap’ in this system.

Nature Materials, Published online: 27 May 2020; doi:10.1038/s41563-020-0693-9

Two studies investigate the behaviour of localized interlayer excitons in van der Waals heterostructures, offering insights into their dipolar interactions and the effect of moiré trapping potentials for the design of quantum optical applications based on 2D materials.

Nature, Published online: 27 May 2020; doi:10.1038/s41586-020-2298-5

Large-area single-crystal high-index copper and nickel foils with several types of facet are fabricated using mild pre-oxidation of the metal foil surface followed by annealing in a reducing atmosphere.

Nature, Published online: 23 May 2020; doi:10.1038/s41586-020-2372-z

Author Correction: Layered nanocomposites by shear-flow-induced alignment of nanosheets