Featured
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News & Views |
Wearable graphene sensors use ambient light to monitor health
Graphene coated with nanoparticles has been used to make wearable light sensors that measure the human pulse and blood oxygen levels from ambient light passing through tissue, offering a potential platform for health-care monitoring.
- Deji Akinwande
- & Dmitry Kireev
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Article |
Superconductors, orbital magnets and correlated states in magic-angle bilayer graphene
The fabrication of magic-angle twisted bilayer graphene devices with highly uniform twist angles enables the observation of new superconducting domes, orbital magnets and Chern insulating states.
- Xiaobo Lu
- , Petr Stepanov
- & Dmitri K. Efetov
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Article |
Imaging work and dissipation in the quantum Hall state in graphene
Imaging studies show that topological protection in the quantum Hall state in graphene is undermined by edge reconstruction with a dissipation mechanism that comprises two distinct and spatially separated processes—work generation and entropy generation.
- A. Marguerite
- , J. Birkbeck
- & E. Zeldov
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Letter |
Measuring the Berry phase of graphene from wavefront dislocations in Friedel oscillations
The Berry phase of graphene is measured in the absence of an applied magnetic field by observing dislocations in the Friedel oscillations formed at a hydrogen atom adsorbed on graphene.
- C. Dutreix
- , H. González-Herrero
- & V. T. Renard
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Review Article |
Graphene and two-dimensional materials for silicon technology
Progress in integrating atomically thin two-dimensional materials with silicon-based technology is reviewed, together with the associated opportunities and challenges, and a roadmap for future applications is presented.
- Deji Akinwande
- , Cedric Huyghebaert
- & Frank H. L. Koppens
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News Feature |
Meet the crystal growers who sparked a revolution in graphene electronics
Two Japanese scientists supply hundreds of laboratories with a prized gem — and are now among the world’s most published researchers.
- Mark Zastrow
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Letter |
Position and momentum mapping of vibrations in graphene nanostructures
Investigation of a free-standing graphene monolayer using a technique based on transmission electron microscopy allows identification of atomic vibrations characteristic of the bulk or the edge of the sample.
- Ryosuke Senga
- , Kazu Suenaga
- & Thomas Pichler
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Letter |
Signatures of tunable superconductivity in a trilayer graphene moiré superlattice
By varying the vertical displacement field in a trilayer graphene and hexagonal boron nitride moiré superlattice, transitions can be observed from the superconducting phase to Mott insulator and metallic phases.
- Guorui Chen
- , Aaron L. Sharpe
- & Feng Wang
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News |
Strange topological materials are popping up everywhere physicists look
‘Fragile topology’ is the latest addition to a group of quantum phenomena that give materials exotic — and exciting — properties.
- Davide Castelvecchi
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Letter |
Spin–orbit-driven band inversion in bilayer graphene by the van der Waals proximity effect
By enhancing the spin–orbit coupling in bilayer graphene using the proximity effect in a van der Waals heterostructure, band inversion occurs and an incompressible, gapped phase is produced.
- J. O. Island
- , X. Cui
- & A. F. Young
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Letter |
Molecular streaming and its voltage control in ångström-scale channels
Pressure-driven transport of aqueous salts through ångström-scale channels created from two-dimensional materials shows a transistor-like effect in which applying a tiny bias voltage can increase transport by up to 20 times.
- T. Mouterde
- , A. Keerthi
- & B. Radha
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Letter |
Resonantly hybridized excitons in moiré superlattices in van der Waals heterostructures
Excitonic bands in MoSe2/WS2 heterostructures can hybridize, resulting in a resonant enhancement of moiré superlattice effects.
- Evgeny M. Alexeev
- , David A. Ruiz-Tijerina
- & Alexander I. Tartakovskii
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Letter |
Observation of moiré excitons in WSe2/WS2 heterostructure superlattices
Moiré superlattice exciton states are observed in WSe2/WS2 heterostructures with closely aligned layers.
- Chenhao Jin
- , Emma C. Regan
- & Feng Wang
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News Feature |
Nature’s 10: Ten people who mattered in science in 2018
Picks include a rogue gene-editor, a wunderkind physicist and a DNA detective who helped catch a serial killer.
- Elizabeth Gibney
- , Ewen Callaway
- & Davide Castelvecchi
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Letter |
Extremely efficient terahertz high-harmonic generation in graphene by hot Dirac fermions
Efficient terahertz harmonic generation—challenging but important for ultrahigh-speed optoelectronic technologies—is demonstrated in graphene through a nonlinear process that could potentially be generalized to other materials.
- Hassan A. Hafez
- , Sergey Kovalev
- & Dmitry Turchinovich
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Research Highlight |
How to make graphene ‘snow’ in a microwave
A simple method produces a high yield of graphene, which is difficult to manufacture in bulk.
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News & Views |
Topological states engineered in narrow strips of graphene
In materials known as graphene nanoribbons, topological states can be precisely engineered and probed, providing an experimental platform for studying electronic topology.
- Katharina J. Franke
- & Felix von Oppen
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Letter |
Engineering of robust topological quantum phases in graphene nanoribbons
Graphene nanoribbons are used to design robust nanomaterials with controlled periodic coupling of topological boundary states to create quasi-one-dimensional trivial and non-trivial electronic quantum phases.
- Oliver Gröning
- , Shiyong Wang
- & Roman Fasel
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Letter |
Topological band engineering of graphene nanoribbons
A topologically engineered graphene nanoribbon superlattice is presented that hosts a one-dimensional array of half-filled, in-gap localized electronic states, enabling band engineering.
- Daniel J. Rizzo
- , Gregory Veber
- & Felix R. Fischer
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Letter |
Electrically controlled water permeation through graphene oxide membranes
The rapid water transport through graphene oxide membranes can be switched off by introducing localized electric fields within the membranes that ionize surrounding water molecules and thus block transport.
- K.-G. Zhou
- , K. S. Vasu
- & R. R. Nair
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Letter |
Heterointerface effects in the electrointercalation of van der Waals heterostructures
The electrointercalation of lithium into van der Waals heterostructures of graphene, hexagonal boron nitride and molybdenum dichalcogenides is studied at the level of individual atomic interfaces.
- D. Kwabena Bediako
- , Mehdi Rezaee
- & Philip Kim
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Letter |
Gate-tunable frequency combs in graphene–nitride microresonators
Coupling graphene sheets with a silicon nitride ring microresonator allows the nonlinear cavity dynamics to be altered by a gate voltage, resulting in tunable, chip-scale, optical frequency combs.
- Baicheng Yao
- , Shu-Wei Huang
- & Chee Wei Wong
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Letter |
Magnetic edge states and coherent manipulation of graphene nanoribbons
By functionalizing molecular graphene nanoribbons with stable spin-bearing nitronyl nitroxide radical groups, delocalized magnetic edge states are observed, with microsecond-scale spin coherence times.
- Michael Slota
- , Ashok Keerthi
- & Lapo Bogani
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Letter |
Fundamental limits to graphene plasmonics
The fundamental limits to plasmon damping in graphene are determined using nanoscale infrared imaging at cryogenic temperatures, and plasmon polaritons are observed to propagate over 10 micrometres in high-mobility encapsulated graphene.
- G. X. Ni
- , A. S. McLeod
- & D. N. Basov
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News |
Surprise graphene discovery could unlock secrets of superconductivity
Physicists make misaligned sheets of the carbon material conduct electricity without resistance.
- Elizabeth Gibney
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Letter |
Correlated insulator behaviour at half-filling in magic-angle graphene superlattices
When the two graphene sheets in a van der Waals heterostructure are twisted relative to each other by a specific amount, Mott-like insulating phases are observed at half-filling.
- Yuan Cao
- , Valla Fatemi
- & Pablo Jarillo-Herrero
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Article |
Unconventional superconductivity in magic-angle graphene superlattices
A superlattice consisting of two graphene sheets twisted relative to each other by a specific amount exhibits superconductivity when doped electrostatically, with a relatively high critical temperature.
- Yuan Cao
- , Valla Fatemi
- & Pablo Jarillo-Herrero
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Letter |
Ion sieving in graphene oxide membranes via cationic control of interlayer spacing
Cations are used to control the interlayer spacing of graphene oxide membranes, enabling efficient and selective sieving of hydrated cations.
- Liang Chen
- , Guosheng Shi
- & Haiping Fang
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Letter |
Light-field-driven currents in graphene
Light-field-driven control of electrons in a conductor is demonstrated by inducing a current by laser pulses in graphene that is sensitive to the carrier-envelope phase.
- Takuya Higuchi
- , Christian Heide
- & Peter Hommelhoff
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Letter |
Tunable interacting composite fermion phases in a half-filled bilayer-graphene Landau level
Various fractional quantum Hall phases are observed in a new generation of bilayer-graphene-based van der Waals heterostructures, including an even-denominator state predicted to harbour non-Abelian anyons.
- A. A. Zibrov
- , C. Kometter
- & A. F. Young
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Letter |
Remote epitaxy through graphene enables two-dimensional material-based layer transfer
Conventional epitaxy is of limited application, but by placing a monolayer of graphene between the substrate and the so-called epilayer grown on top, its scope can be substantially extended.
- Yunjo Kim
- , Samuel S. Cruz
- & Jeehwan Kim
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Letter |
The evolving quality of frictional contact with graphene
Atomistic simulations reproduce experimental observations of transient frictional strengthening of graphene on an amorphous silicon substrate, an effect which diminishes as the number of graphene layers increases.
- Suzhi Li
- , Qunyang Li
- & Ju Li
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Letter |
Nanoscale thermal imaging of dissipation in quantum systems
A cryogenic thermal imaging technique that uses a superconducting quantum interference device fabricated on the tip of a sharp pipette can be used to image the thermal signature of extremely low power nanometre-scale dissipation processes.
- D. Halbertal
- , J. Cuppens
- & E. Zeldov
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Letter |
Self-assembly of graphene ribbons by spontaneous self-tearing and peeling from a substrate
The controllable self-assembly of graphene ribbons on a substrate is shown, demonstrating an effect which could be applied to patterning and actuating devices made from two-dimensional materials.
- James Annett
- & Graham L. W. Cross
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Letter |
Lanthanum-catalysed synthesis of microporous 3D graphene-like carbons in a zeolite template
A long-sought three-dimensional graphene-like carbon structure that resembles periodically networked carbon nanotubes is now readily available through lanthanum-catalysed carbon synthesis using a zeolite template.
- Kyoungsoo Kim
- , Taekyoung Lee
- & Ryong Ryoo
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Letter |
On-surface synthesis of graphene nanoribbons with zigzag edge topology
Synthesis of atomically precise zigzag edges in graphene nanoribbons is demonstrated using a bottom-up strategy based on surface-assisted arrangement and reaction of precursor monomers; these nanoribbons have edge-localized states with large energy splittings.
- Pascal Ruffieux
- , Shiyong Wang
- & Roman Fasel
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News |
Light and heat propel bendy graphene crawlers
Layers of water-absorbing material fold into origami-inspired shapes.
- Chris Cesare
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News |
Nanotube implants show diagnostic potential
Devices could track insulin levels in the body or sniff out cancerous cells.
- Rachel Ehrenberg
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News |
Physicists announce graphene’s latest cousin: stanene
First observation of 2D tin can't confirm whether material can conduct electricity without heat loss.
- Chris Cesare
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Letter |
Graphene kirigami
The ratio of in-plane stiffness to out-of-plane bending stiffness of graphene is shown to be similar to that of a piece of paper, which allows ideas from kirigami (a variation of origami that allows cutting) to be applied to micrometre-scale graphene sheets to build mechanically stretchable yet robust electrodes, springs and hinges.
- Melina K. Blees
- , Arthur W. Barnard
- & Paul L. McEuen
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Research Highlights |
Graphene protects cells for imaging
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Books & Arts |
Q&A: Maestros of graphene
Composer Sara Lowes has teamed up with materials scientist Cinzia Casiraghi at the University of Manchester, UK. The result, Lowes' six-part Graphene Suite, premieres next week at the Graphene Week 2015 conference in Manchester, part of the European Union's decade-long, €1-billion (US$1.1-billion) Graphene Flagship research programme. Lowes and Casiraghi talk crotchets, carbon chemistry and the commonalities between women in science and women in music.
- Mark Peplow
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Letter |
Topological valley transport at bilayer graphene domain walls
The bandgap of bilayer graphene can be tuned with an electric field and topological valley polarized modes have been predicted to exist at its domain boundaries; here, near-field infrared imaging and low-temperature transport measurements reveal such modes in gapped bilayer graphene.
- Long Ju
- , Zhiwen Shi
- & Feng Wang
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News & Views |
Square ice in a graphene sandwich
Films of ice less than 1 nanometre thick, sandwiched between sheets of graphene, have been observed to adopt a square lattice structure quite different from the widely occurring hexagonal structure of bulk ice. See Letter p.443
- Alan K. Soper
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News & Views |
Nanoscale locomotion without fuel
Computer simulations have revealed a mechanism by which nanostructures of the material graphene can be driven in one direction by controlling the stiffness of the underlying substrate.
- Amanda S. Barnard
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News |
Graphene’s cousin silicene makes transistor debut
Creation of electronic device using atom-thin silicon sheets could boost work on other flat materials.
- Mark Peplow
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Letter |
Room-temperature magnetic order on zigzag edges of narrow graphene nanoribbons
In graphene nanoribbons of ‘zigzag’ edge orientation, the edges host unpaired electron spins that couple to generate long-range magnetic order (switching from antiferromagnetic to ferromagnetic inter-edge configuration as the ribbon width increases) under ambient conditions, enhancing the prospects for graphene-based spintronic devices.
- Gábor Zsolt Magda
- , Xiaozhan Jin
- & Levente Tapasztó
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Letter |
Piezoelectricity of single-atomic-layer MoS2 for energy conversion and piezotronics
The two-dimensional semiconducting material molybdenum disulphide shows strong piezoelectricity in its single-layered form, suggesting possible applications in nanoscale electromechanical devices for sensing and energy harvesting.
- Wenzhuo Wu
- , Lei Wang
- & Zhong Lin Wang