jinzhitong

Nature Electronics, Published online: 17 June 2021; doi:10.1038/s41928-021-00598-6

By transferring two-dimensional semiconductors from rigid growth substrates together with nano-patterned metal contacts, flexible field-effect transistors can be fabricated with channel lengths down to 60 nm.

Nature Nanotechnology, Published online: 17 June 2021; doi:10.1038/s41565-021-00919-y

A strain-gradient approach induced by the phase-change transition enables the observation of the flexo-photovoltaic effect in MoS2.

The observation of optically addressable nonvolatile memory in VO₂ at room temperature and in the ambient environment is reported. The nonvolatile memory state was accessed within the narrow hysteresis of the first major transition in current-biased VO₂. The memory was read out as voltage oscillations between the insulator and metal states.

Abstract

Vanadium dioxide (VO₂) is a phase change material that can reversibly change between high and low resistivity states through electronic and structural phase transitions. Thus far, VO₂ memory devices have essentially been volatile at room temperature, and nonvolatile memory has required non-ambient surroundings (e.g., elevated temperatures, electrolytes) and long write times. For the first time, here, the authors report the observation of optically addressable nonvolatile memory in VO₂ at room temperature with a readout by voltage oscillations. The read and write times have to be kept shorter than about 150 µs. The writing of the memory and onset of the voltage oscillations have a minimum optical power threshold. Although the physical mechanisms underlying this memory effect require further investigations, this discovery illustrates the potential of VO₂ for new computing devices and architectures, such as artificial neurons and oscillatory neural networks.

Ångström-thin hexagonal boron nitride (hBN) is a highly promising barrier/liner dielectric material for passivating electrical interconnects in ultra-scaled integrated circuits (ICs). In article number 2100002, Michael Cai Wang and co-workers present a novel approach to mitigating electromigration in nanoscale copper interconnects. Significant improvements in the breakdown current density and operating lifetime are observed in hBN-passivated copper interconnects, paving the way for further single-nanometer node scaling of semiconductor and ICs manufacturing

Nature Electronics, Published online: 09 June 2021; doi:10.1038/s41928-021-00609-6

Author Correction: Self-biased magnetoelectric switching at room temperature in three-phase ferroelectric–antiferromagnetic–ferrimagnetic nanocomposites

Nature Physics, Published online: 10 June 2021; doi:10.1038/s41567-021-01254-8

The interplay of superconductivity and nematicity of electrons remains unclear in a wide range of materials. Now, more evidence emerges that nematic fluctuations can be pinned into a static phase by disorder, which hinders the superconductivity.

Nature Materials, Published online: 10 June 2021; doi:10.1038/s41563-021-01029-9

Metal-halide and oxide perovskites are a rich playground for fundamental studies and applications. This Review focuses on the opportunities opened by reducing the dimensionality of these materials to two-dimensional monolayers.

Nature Electronics, Published online: 07 June 2021; doi:10.1038/s41928-021-00591-z

By using two-dimensional materials with different polarities, single neuristors can act as XNOR, NOR, OR and AND logic gates.

Nature Electronics, Published online: 07 June 2021; doi:10.1038/s41928-021-00606-9

Author Correction: High-mobility p-type semiconducting two-dimensional β-TeO₂

Nature Materials, Published online: 07 June 2021; doi:10.1038/s41563-021-00983-8

A thermal signature of the chiral anomaly is reported in an ideal Weyl semimetal.

Author(s): Bo Han, Ruixue Zhu, Xiaomei Li, Mei Wu, Ryo Ishikawa, Bin Feng, Xuedong Bai, Yuichi Ikuhara, and Peng Gao

The broken symmetry at structural defects such as grain boundaries (GBs) discontinues chemical bonds, leading to the emergence of new properties that are absent in the bulk owing to the couplings between the lattice and other parameters. Here, we create a two-dimensional antiferrodistortive (AFD) st...

[Phys. Rev. Lett. 126, 225702] Published Fri Jun 04, 2021

Nature Chemistry, Published online: 03 June 2021; doi:10.1038/s41557-021-00709-y

On-surface, ultra-high vacuum conditions enable two-dimensional polymerizations to be precisely studied—often with submolecular resolution—but these syntheses are typically thermally activated, which can lead to high defect densities and relatively small domain sizes. Now, a self-assembled monolayer of a three-bladed fantrip monomer on alkane-passivated graphite has been covalently crosslinked into a mesoscale-ordered two-dimensional polymer by [4+4] photocycloaddition.