Featured
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One-dimensional proximity superconductivity in the quantum Hall regime
We show that domain walls in minimally twisted bilayer graphene support exceptionally robust proximity superconductivity in the quantum Hall regime.
- Julien Barrier
- , Minsoo Kim
- & A. K. Geim
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Direct observation of a magnetic-field-induced Wigner crystal
A magnetic-field-induced Wigner crystal in Bernal-stacked bilayer graphene was directly imaged using high-resolution scanning tunnelling microscopy and its structural properties as a function of electron density, magnetic field and temperature were examined.
- Yen-Chen Tsui
- , Minhao He
- & Ali Yazdani
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Fractional quantum anomalous Hall effect in multilayer graphene
Integer and fractional quantum anomalous Hall effects in a rhombohedral pentalayer graphene–hBN moiré superlattice are observed, providing an ideal platform for exploring charge fractionalization and (non-Abelian) anyonic braiding at zero magnetic field.
- Zhengguang Lu
- , Tonghang Han
- & Long Ju
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| Open AccessLight-driven nanoscale vectorial currents
Vectorial optoelectronic metasurfaces are described, showing that light pulses can be used to drive and direct local charge flows around symmetry-broken plasmonic nanostructures, leading to tunable responses in terahertz emission.
- Jacob Pettine
- , Prashant Padmanabhan
- & Hou-Tong Chen
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Ultrahigh-mobility semiconducting epitaxial graphene on silicon carbide
Semiconducting epigraphene aligned with single-crystal silicon carbide substrates has a band gap of 0.6 eV and room temperature mobilities 20 times larger than that of other two-dimensional semiconductors, making it suitable for nanoelectronics.
- Jian Zhao
- , Peixuan Ji
- & Walt A. de Heer
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Evidence for chiral supercurrent in quantum Hall Josephson junctions
Ultra-narrow quantum Hall Josephson junctions defined in encapsulated graphene nanoribbons exhibit a chiral supercurrent, visible up to 8 T.
- Hadrien Vignaud
- , David Perconte
- & Benjamin Sacépé
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| Open AccessImaging quantum oscillations and millitesla pseudomagnetic fields in graphene
Imaging of quantum oscillations in Bernal-stacked trilayer graphene with dual gates enables high-precision reconstruction of the highly tunable bands and reveals naturally occurring pseudomagnetic fields as low as 1 mT corresponding to graphene twisting by 1 millidegree.
- Haibiao Zhou
- , Nadav Auerbach
- & Eli Zeldov
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Ultralow-resistance electrochemical capacitor for integrable line filtering
A miniaturized narrow-channel in-plane electrochemical capacitor shows drastically reduced ionic resistances within both the electrode material and the electrolyte and an ultrahigh areal capacitance by downscaling the channel width with femtosecond-laser scribing.
- Yajie Hu
- , Mingmao Wu
- & Liangti Qu
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Orbital multiferroicity in pentalayer rhombohedral graphene
Orbital multiferroicity reported in pentalayer rhombohedral graphene features ferro-orbital-magnetism and ferro-valleytricity, both of which can be controlled by an electric field.
- Tonghang Han
- , Zhengguang Lu
- & Long Ju
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| Open AccessProton transport through nanoscale corrugations in two-dimensional crystals
A study using high-resolution scanning electrochemical cell microscopy attributes proton permeation through defect-free graphene and hexagonal boron nitride to transport across areas of the structure that are under strain.
- O. J. Wahab
- , E. Daviddi
- & P. R. Unwin
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Tunable electron–flexural phonon interaction in graphene heterostructures
Experimental observation and calculations show that broken reflection symmetry in graphene heterostructures allows tunable electron–flexural phonon coupling, providing a way to control quantum matter at the atomic scale.
- Mir Mohammad Sadeghi
- , Yajie Huang
- & Li Shi
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| Open AccessGiant magnetoresistance of Dirac plasma in high-mobility graphene
A Dirac plasma in high-mobility graphene shows anomalous magnetotransport and giant magnetoresistance that reaches more than 100 per cent in a low magnetic field at room temperature.
- Na Xin
- , James Lourembam
- & Alexey I. Berdyugin
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News & Views |
A twist in the bid to probe electrons in solids
Two microscopy techniques have been merged into a tool for twisting ultrathin sheets of atoms relative to each other. The approach offers a new angle for studying the electronic properties of exotic layered materials.
- Rebeca Ribeiro-Palau
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Evidence for Dirac flat band superconductivity enabled by quantum geometry
The authors investigate the effect of small velocity in a superconducting Dirac flat band system, finding evidence for small pairs and that superfluid stiffness is not dominated by kinetic energy.
- Haidong Tian
- , Xueshi Gao
- & Marc W. Bockrath
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Imaging hydrodynamic electrons flowing without Landauer–Sharvin resistance
At elevated temperatures, electron hydrodynamics efficiently eliminate the ‘bulk Landauer–Sharvin’ resistance, demonstrating that hydrodynamics can dramatically modify the well-established rules obeyed by ballistic electrons.
- C. Kumar
- , J. Birkbeck
- & S. Ilani
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News |
Twisted graphene, climate bill — the week in infographics
Nature highlights three key graphics from the week in science and research.
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News & Views |
Twisted-graphene model draws inspiration from heavy elements
Electrons in a pure-carbon material display properties that are reminiscent of those in heavy-element compounds. A model inspired by this link hints at how a single-element material can exhibit complex electronic behaviour.
- Aline Ramires
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Synthesis of a monolayer fullerene network
Using an interlayer bonding cleavage strategy, a two-dimensional monolayer fullerene network is prepared; its moderate bandgap makes it a potential candidate for use in two-dimensional electronic devices.
- Lingxiang Hou
- , Xueping Cui
- & Jian Zheng
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Imaging tunable quantum Hall broken-symmetry orders in graphene
Three tunable quantum Hall broken-symmetry states in charge-neutral graphene are identified by visualizing their lattice-scale order with scanning tunnelling microscopy and spectroscopy.
- Alexis Coissard
- , David Wander
- & Benjamin Sacépé
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Observation of chiral and slow plasmons in twisted bilayer graphene
Two new plasmon modes are observed in macroscopic twisted bilayer graphene with a highly ordered moiré superlattice, the first being the signature of chiral plasmons and the second a slow plasmonic mode around 0.4 electronvolts.
- Tianye Huang
- , Xuecou Tu
- & Xiaomu Wang
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News & Views |
A detector that can learn the fingerprint of light
The polarization, wavelength and power of a light wave can be simultaneously identified by a compact device made from twisted layers of carbon atoms — with a little help from an artificial neural network.
- Justin C. W. Song
- & Yidong Chong
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News & Views |
Isotopes tracked on a sub-nanometre scale using electron spectroscopy
Measurements of atomic vibrations can now identify chemical isotopes on a sub-nanometre scale in an electron microscope. An innovative approach makes use of this resolution to build and track isotopic domains.
- Jordan A. Hachtel
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Imaging of isotope diffusion using atomic-scale vibrational spectroscopy
Vibrational electron energy-loss spectroscopy is used to distinguish two stable isotopes of carbon and to monitor their diffusion with subnanometre spatial resolution.
- Ryosuke Senga
- , Yung-Chang Lin
- & Kazu Suenaga
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News & Views |
Clever substitutions reveal magnetism in zigzag graphene nanoribbons
The inclusion of nitrogen atoms stabilizes the zigzag edges of carbon-based nanoribbons, enabling the ribbons to be decoupled from a substrate and providing a probe for their unconventional magnetism.
- Aran Garcia-Lekue
- & Daniel Sánchez-Portal
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Spin splitting of dopant edge state in magnetic zigzag graphene nanoribbons
Decoupling spin-polarized edge states using substitutional N-atom dopants along the edges of a zigzag graphene nanoribbon (ZGNR) reveals giant spin splitting of a N-dopant edge state, and supports the predicted emergent magnetic order in ZGNRs.
- Raymond E. Blackwell
- , Fangzhou Zhao
- & Felix R. Fischer
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News & Views |
Untwisted trilayer graphene hosts superconductivity and magnetism
Superconductivity and magnetism have been observed in layered graphene in which the sheets are twisted with respect to each other. But a simpler, more stable graphene system also exhibits these phases.
- Thiti Taychatanapat
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Superconductivity in rhombohedral trilayer graphene
Superconductivity is observed in rhombohedral trilayer graphene in the absence of a moiré superlattice, with two distinct superconducting states both occurring at a symmetry-breaking transition where the Fermi surface degeneracy changes.
- Haoxin Zhou
- , Tian Xie
- & Andrea F. Young
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Half- and quarter-metals in rhombohedral trilayer graphene
A study shows that rhombohedral graphene is an ideal platform for well-controlled tests of many-body theory and reveals that magnetism in moiré materials is fundamentally itinerant in nature.
- Haoxin Zhou
- , Tian Xie
- & Andrea F. Young
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Single-crystal, large-area, fold-free monolayer graphene
Restricting the initial growth temperatures used for chemical vapour deposition of graphene on metal foils produces optimum conditions for growing large areas of fold-free, single-crystal graphene.
- Meihui Wang
- , Ming Huang
- & Rodney S. Ruoff
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Fizeau drag in graphene plasmonics
Direct infrared nano-imaging of plasmonic waves in graphene carrying high current density reveals the Fizeau drag of plasmon polaritons by fast-moving quasi-relativistic electrons.
- Y. Dong
- , L. Xiong
- & D. N. Basov
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Long-range nontopological edge currents in charge-neutral graphene
Nanoscale imaging of edge currents in charge-neutral graphene shows that charge accumulation can explain various exotic nonlocal transport measurements, bringing into question some theories about their origins.
- A. Aharon-Steinberg
- , A. Marguerite
- & E. Zeldov
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Flavour Hund’s coupling, Chern gaps and charge diffusivity in moiré graphene
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.
- Jeong Min Park
- , Yuan Cao
- & Pablo Jarillo-Herrero
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Localization of lattice dynamics in low-angle twisted bilayer graphene
Nano-Raman spectroscopy reveals localization of some vibrational modes in reconstructed twisted bilayer graphene and provides qualitative insights into how electron–phonon coupling affects the vibrational and electronic properties of the material.
- Andreij C. Gadelha
- , Douglas A. A. Ohlberg
- & Ado Jorio
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Matters Arising |
Reply to: On the measured dielectric constant of amorphous boron nitride
- Seokmo Hong
- , Min-Hyun Lee
- & Hyeon Suk Shin
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Electrical switching of magnetic order in an orbital Chern insulator
Non-volatile electrical switching of magnetic order in an orbital Chern insulator is experimentally demonstrated using a moiré heterostructure and analysis shows that the effect is driven by topological edge states.
- H. Polshyn
- , J. Zhu
- & A. F. Young
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Graphene-based Josephson junction microwave bolometer
An ultimately thin microwave bolometric sensor based on a superconductor–graphene–superconductor Josephson junction with monolayer graphene has a sensitivity approaching the fundamental limit imposed by intrinsic thermal fluctuations.
- Gil-Ho Lee
- , Dmitri K. Efetov
- & Kin Chung Fong
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Bolometer operating at the threshold for circuit quantum electrodynamics
A thermal detector based on a graphene monolayer operates at the threshold for circuit quantum electrodynamics applications, achieving a minimum time constant of 200 ns.
- R. Kokkoniemi
- , J.-P. Girard
- & M. Möttönen
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Evidence of flat bands and correlated states in buckled graphene superlattices
Buckled monolayer graphene superlattices are found to provide an alternative to twisted bilayer graphene for the study of flat bands and correlated states in a carbon-based material.
- Jinhai Mao
- , Slaviša P. Milovanović
- & Eva Y. Andrei
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Tunable spin-polarized correlated states in twisted double bilayer graphene
Twisted double bilayer graphene devices show tunable spin-polarized correlated states that are sensitive to electric and magnetic fields, providing further insights into correlated states in two-dimensional moiré materials.
- Xiaomeng Liu
- , Zeyu Hao
- & Philip Kim
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Untying the insulating and superconducting orders in magic-angle graphene
Tuning the electronic interactions by changing the dielectric environment of twisted bilayer graphene reveals the disappearance of the insulating states and their replacement by superconducting phases, suggesting a competition between the two phases.
- Petr Stepanov
- , Ipsita Das
- & Dmitri K. Efetov
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Cascade of phase transitions and Dirac revivals in magic-angle graphene
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.
- U. Zondiner
- , A. Rozen
- & S. Ilani
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Tunable correlated states and spin-polarized phases in twisted bilayer–bilayer graphene
Small-angle twisted bilayer–bilayer graphene is tunable by the twist angle and electric and magnetic fields, and can be used to gain further insights into correlated states in two-dimensional superlattices.
- Yuan Cao
- , Daniel Rodan-Legrain
- & Pablo Jarillo-Herrero
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Mapping the twist-angle disorder and Landau levels in magic-angle graphene
SQUID-on-tip tomographic imaging of Landau levels in magic-angle graphene provides nanoscale maps of local twist-angle disorder and shows that its properties are fundamentally different from common types of disorder.
- A. Uri
- , S. Grover
- & E. Zeldov
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Limits on gas impermeability of graphene
Graphene is shown to be impermeable to helium and several other gases, except for hydrogen, which is attributed to the strong catalytic activity of ripples in the graphene sheet.
- P. Z. Sun
- , Q. Yang
- & A. K. Geim
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Tunable correlated Chern insulator and ferromagnetism in a moiré superlattice
A topological Chern insulating state is reported to emerge from strong correlations in flat moiré bands in a graphene superlattice and by applying a vertical electric field the Chern number is switched.
- Guorui Chen
- , Aaron L. Sharpe
- & Feng Wang
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Ultrafast machine vision with 2D material neural network image sensors
A two-dimensional semiconductor photodiode array senses and processes optical images simultaneously without latency, and is trained to classify and encode images with high throughput, acting as an artificial neural network.
- Lukas Mennel
- , Joanna Symonowicz
- & Thomas Mueller
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Heterogeneous integration of single-crystalline complex-oxide membranes
A universal mechanical exfoliation method of creating freestanding membranes of complex-oxide materials with different crystal structures and orientations and stacking them to produce a range of artificial heterostructures with hybridized physical properties is described.
- Hyun S. Kum
- , Hyungwoo Lee
- & Jeehwan Kim
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Gram-scale bottom-up flash graphene synthesis
Flash Joule heating of inexpensive carbon sources is used to produce gram-scale quantities of high-quality graphene in under a second, without the need for a furnace, solvents or reactive gases.
- Duy X. Luong
- , Ksenia V. Bets
- & James M. Tour
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Proton-assisted growth of ultra-flat graphene films
A growth process in which protons decouple graphene from the underlying substrate greatly reduces the number of wrinkles that usually degrade large graphene films grown by chemical vapour deposition.
- Guowen Yuan
- , Dongjing Lin
- & Libo Gao