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| Open AccessTunable exciton valley-pseudospin orders in moiré superlattices
Control of correlated excitonic states is a key goal of modern optoelectronic physics. Here, the authors demonstrate filling- and field-tunable exciton valley-pseudospin orders in a moiré heterostructure.
- Richen Xiong
- , Samuel L. Brantly
- & Chenhao Jin
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Article
| Open AccessCentimeter-scale nanomechanical resonators with low dissipation
Exploring new mechanics regime, researchers created centimeter-long, nanometer-thin resonators, achieving unmatched room temperature mechanical isolation via cutting edge nanoengineering and machine learning design; rivaling cryogenic counterparts.
- Andrea Cupertino
- , Dongil Shin
- & Richard A. Norte
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Article
| Open AccessDynamically stable radiation pressure propulsion of flexible lightsails for interstellar exploration
Ultrathin laser-driven lightsails represent a unique vision for interstellar space exploration. Here, the authors show how spinning flexible membranes can be both shape- and trajectory-stable with multiphysics structural and nanophotonic engineering.
- Ramon Gao
- , Michael D. Kelzenberg
- & Harry A. Atwater
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Article
| Open AccessRemote epitaxy of single-crystal rhombohedral WS2 bilayers
Rhombohedral-stacked (R-stacked) transition metal dichalcogenide bilayers exhibit remarkable properties, but their large-area epitaxial growth remains challenging. Here, the authors report the remote epitaxy of centimetre-scale single-crystal R-stacked WS2 bilayer films on sapphire substrates.
- Chao Chang
- , Xiaowen Zhang
- & Xiaozhi Xu
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Article
| Open AccessDual-phase nano-glass-hydrides overcome the strength-ductility trade-off and magnetocaloric bottlenecks of rare earth based amorphous alloys
Metals often suffer from reduced strength and ductility after hydrogenation. Here, the authors show hydrogenation can lead to enhancement in strength and ductility accompanied by a large change in magnetic entropy, overcoming the bottlenecks of using amorphous alloys for magnetic refrigerants.
- Liliang Shao
- , Qiang Luo
- & Weihua Wang
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Article
| Open AccessHigh-performance piezoelectric energy harvesting in amorphous perovskite thin films deposited directly on a plastic substrate
Traditional methods to incorporate polycrystalline thin film into flexible systems are often complicated and limited by their sizes. Here, the authors introduce flexible amorphous thin film energy harvester, based on perovskite oxides, on a plastic substrate for electromechanical energy harvesting.
- Ju Han
- , Sung Hyun Park
- & Yong Soo Cho
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Article
| Open AccessUltrastrong magnon-magnon coupling and chiral spin-texture control in a dipolar 3D multilayered artificial spin-vortex ice
Extending magnetic nanostructures into three dimensions offers a vast increase in potential functionalities, but this typically comes at the expense of ease of fabrication and measurement. Here, Dion et al. demonstrate an approach to creating three dimensional magnetic nanostructures while retaining easy fabrication and readout of established two dimensional approaches.
- Troy Dion
- , Kilian D. Stenning
- & Jack C. Gartside
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Article
| Open AccessElectric-field tunable Type-I to Type-II band alignment transition in MoSe2/WS2 heterobilayers
Photoluminescence and photocurrent measurements indicate that MoSe2/WS2 hetero-bilayers can be switched from type-I to type-II band alignment by applying a vertical electric field.
- Jed Kistner-Morris
- , Ao Shi
- & Nathaniel Gabor
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Article
| Open AccessAtomically dispersed asymmetric cobalt electrocatalyst for efficient hydrogen peroxide production in neutral media
The relationship between the structural configurations of M-N-C electrocatalysts and their performances in neutral environments has been insufficiently investigated. Here the authors demonstrate that an ultralow metal-loaded Co-N-C electrocatalyst, featuring the asymmetric Co-C/N/O configuration, exhibit exceptional efficiency in electrochemically producing hydrogen peroxide under neutral conditions.
- Longxiang Liu
- , Liqun Kang
- & Guanjie He
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Article
| Open AccessDynamics of growing carbon nanotube interfaces probed by machine learning-enabled molecular simulations
There is a lack of atomic level insight on the role of defects on carbon nanotubes' growth. Here, authors present a machine learning force field to drive near-microsecond simulations the entire growth process of this material, unveiling mechanisms of defect formation and healing.
- Daniel Hedman
- , Ben McLean
- & Feng Ding
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Article
| Open AccessTailoring amorphous boron nitride for high-performance two-dimensional electronics
Here, the authors demonstrate a wafer-scale, low-temperature process using atomic layer deposition, for the synthesis of uniform, conformal amorphous boron nitride (aBN) thin films. They further fabricate aBN-encapsulated monolayer MoS2 field-effect transistors.
- Cindy Y. Chen
- , Zheng Sun
- & Joshua A. Robinson
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Article
| Open AccessSynergistic growth of nickel and platinum nanoparticles via exsolution and surface reaction
Utilizing “Chemistry at a point”, Ni is exsolved from a perovskite lattice under deposited Pt nanoparticles. This yields even smaller Ni Pt alloy nanoparticles on a perovskite nanofiber structure, exhibiting high catalytic activity.
- Min Xu
- , Yukwon Jeon
- & John T. S. Irvine
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Article
| Open AccessTuning instability in suspended monolayer 2D materials
Tuning the instabilities of 2D materials can control their wrinkling behavior for interesting physical properties, but still challenging. Here, the authors report a push-to-shear experimental approach to control the wrinkling patterns of monolayer 2D materials and measure their bending stiffness.
- Yuan Hou
- , Jingzhuo Zhou
- & Yang Lu
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Article
| Open AccessDynamic microvilli sculpt bristles at nanometric scale
Bristleworms possess dedicated cells that can synthesize highly stereotypical bristles with sub-micrometric precision. Here, Ikeda and colleagues shed light on the underlying dynamics of cellular protrusions, revealing an extension-disassembly cycle that resembles a 3D printer.
- Kyojiro N. Ikeda
- , Ilya Belevich
- & Florian Raible
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Article
| Open AccessElectrochemical-repaired porous graphene membranes for precise ion-ion separation
The preparation of atom-thick lattices with Å-scale pores is desirable for achieving ion selectivity and high ion flux. Here authors present a cm-scale membrane made of atom-thick graphene film hosting zero-dimensional pores spanning only a few Å, repaired using an in situ electrochemical strategy, yielding high Li+/Mg2+ separation performance.
- Zongyao Zhou
- , Kangning Zhao
- & Kumar Varoon Agrawal
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Article
| Open AccessCavity-enhanced photon indistinguishability at room temperature and telecom wavelengths
Carbon nanotube-based single photon emitters allow for room-temperature operation, but suffer from vanishing indistinguishability due to strong dephasing. Following a theoretical proposal, the authors tackle the problem experimentally by using a cavity to enhance the photon coherence time and the emission spectral density in the regime of incoherent good cavity-coupling.
- Lukas Husel
- , Julian Trapp
- & Alexander Högele
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Article
| Open AccessFirefly-inspired bipolar information indication system actuated by white light
Inspired by fireflies, a bimodal information indication system using a photochemical afterglow material within a photonic crystal matrix is developed to display both static and changing information, such as sample type and degree of degradation.
- Hanwen Huang
- , Jiamiao Yin
- & Changchun Wang
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Article
| Open AccessHalide Perovskite Inducing Anomalous Nonvolatile Polarization in Poly(vinylidene fluoride)-based Flexible Nanocomposites
Wang et al. report large nonvolatile polarization in stretchable polymer ferroelectrics incorporating perovskite nanocrystals. The built-in electric field from poled ferroelectrics stabilises Frenkel defects via interfacial coupling, which can also enhance the polarization of nonferroelectrics.
- Yao Wang
- , Chen Huang
- & Jiangyu Li
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Article
| Open AccessSpin-orbit-splitting-driven nonlinear Hall effect in NbIrTe4
Previous work proposed the Berry curvature dipole as the mechanism of the nonlinear Hall effect. Lee et al. establish the sign-changing Berry curvature hot spots from spin-orbit split bands as the origin of the Berry curvature dipole and link it to the nonlinear Hall effect in the topological semimetal NbIrTe4.
- Ji-Eun Lee
- , Aifeng Wang
- & Hyejin Ryu
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Article
| Open AccessBicontinuous RuO2 nanoreactors for acidic water oxidation
Developing stable water oxidation catalysts is of great importance for proton-exchange membrane water electrolyzers. Here the authors report a bicontinuous nanoreactor composed of multiscale defected RuO2 nanocrystals for robust acidic water oxidation reactivity.
- Ding Chen
- , Ruohan Yu
- & Shichun Mu
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Article
| Open AccessSelf-assembly of nanocrystal checkerboard patterns via non-specific interactions
The self-assembly of nanocrystals into checkerboard lattice patterns is difficult to control. Here, the authors investigate the formation of such patterns from hydrophilic/hydrophobic bifunctionalized Ag nanocubes and use multiscale simulations to understand the effects of physical forces.
- Yufei Wang
- , Yilong Zhou
- & Andrea R. Tao
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Article
| Open AccessEffect of crystal facets in plasmonic catalysis
Crystal facets are known to be important in traditional heterogeneous catalysis, yet this effect has not been studied in plasmon-assisted catalysis. Here, the authors investigate the impact facets have on CO2 reduction using plasmonic Au NPs.
- Yicui Kang
- , Simão M. João
- & Emiliano Cortés
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Article
| Open AccessConstructing ordered and tunable extrinsic porosity in covalent organic frameworks via water-mediated soft-template strategy
The synthesis of covalent organic frameworks (COFs) by a soft-template methodology is challenging. Here, the authors attach the soft templates to the COFs backbone via ion bonds, avoiding crystallization incompatibilities and allowing subsequent removal of the template by ion exchange for enhanced U(VI)/Th(IV) adsorption performance.
- Ningning He
- , Yingdi Zou
- & Lijian Ma
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Article
| Open AccessCapture of single Ag atoms through high-temperature-induced crystal plane reconstruction
Terminal hydroxyl groups on γ-Al2O3 surfaces serve as anchoring sites for Ag. Based on the surface energy of different crystal planes of γ-Al2O3 at various temperatures, the authors propose a high-temperature-induced crystal plane transformation method to construct terminal hydroxyl anchoring sites.
- Jiaxin Li
- , Kai Li
- & Hong He
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Article
| Open AccessRevealing the three-dimensional arrangement of polar topology in nanoparticles
Low-dimensional ferroelectric systems are predicted to have topologically nontrivial polar structures, such as vortices or skyrmions. Here authors present atomic-scale 3D topological polar structures in BaTiO3 nanoparticles using atomic electron tomography and revealed their size-dependent transitions.
- Chaehwa Jeong
- , Juhyeok Lee
- & Yongsoo Yang
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Article
| Open AccessObservation of interlayer plasmon polaron in graphene/WS2 heterostructures
Here, the authors report the observation of an interlayer plasmon polaron in heterostructures composed of graphene and monolayer WS2. This is manifested in the ARPES spectra as a strong quasiparticle peak accompanied by several carrier density-dependent shake-off replicas around the WS2 conduction band minimum.
- Søren Ulstrup
- , Yann in ’t Veld
- & Jyoti Katoch
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Article
| Open AccessUniversal Murray’s law for optimised fluid transport in synthetic structures
Improving mass transfer through hierarchically porous synthetic materials is a great challenge. Here the authors address this by expanding the original Murray’s law, a biomimetic principle defining the branching of veins in living structures.
- Binghan Zhou
- , Qian Cheng
- & Tawfique Hasan
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Article
| Open AccessAtomic-level polarization reversal in sliding ferroelectric semiconductors
Polarization reversal dynamics in sliding ferroelectrics is important for the application in slidetronics. Here, the authors observe the interlayer directional sliding induced polarization switching with simultaneous hysteresis response in γ-InSe:Y.
- Fengrui Sui
- , Haoyang Li
- & Chungang Duan
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Article
| Open AccessLow-index mesoscopic surface reconstructions of Au surfaces using Bayesian force fields
Metal surfaces have long been known to reconstruct, but key mechanistic aspects are poorly understood. Here, the authors use Bayesian force fields to gain insights into gold surface reconstructions that are crucial for material science and catalysis.
- Cameron J. Owen
- , Yu Xie
- & Boris Kozinsky
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Article
| Open AccessSynthetic molecular switches driven by DNA-modifying enzymes
Molecular switches are ubiquitous in the biochemistry regulatory network. Here, the authors construct synthetic molecular switches controlled by DNA-modifying enzymes such as DNA polymerase and nicking endonuclease to control and cascade assembly and disassembly.
- Hong Kang
- , Yuexuan Yang
- & Bryan Wei
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Article
| Open AccessHigh-density, highly sensitive sensor array of spiky carbon nanospheres for strain field mapping
Accurate mapping of strain distribution calls for strain sensor arrays with high sensitivity, high sensing density and inter-unit consistency. Here, the authors report an array made from ordered assembly of monodispersed spiky carbon nanospheres to achieve the above features simultaneously.
- Shuxing Mei
- , Haokun Yi
- & Limin Wu
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Article
| Open AccessObservation of dichotomic field-tunable electronic structure in twisted monolayer-bilayer graphene
The phase diagram of twisted monolayer-bilayer graphene depends on the electric field direction, exhibiting phases similar to twisted bilayer and double-bilayer graphene. Here the authors study the field dependent electronic structure, in particular flat bands, using nano-ARPES and explain the field-tunability.
- Hongyun Zhang
- , Qian Li
- & Shuyun Zhou
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Article
| Open AccessWaveguide-integrated twisted bilayer graphene photodetectors
Silicon-integrated graphene photodetectors exhibit promising bandwidths at telecom wavelengths, but their responsivity is usually limited. Here, the authors report the wafer-scale fabrication of waveguide-integrated detectors based on twisted bilayer graphene, showing responsivities up to 0.65 A/W and 3-dB bandwidths >65 GHz.
- Qinci Wu
- , Jun Qian
- & Hailin Peng
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Article
| Open AccessIntegrated 2D multi-fin field-effect transistors
Here, the authors report the ledge-guided epitaxial growth of high-density 2D Bi2O2Se fin arrays and their application for the realization of 2D multi-channel fin field-effect transistors, showing improved on-state currents as the number of integrated channels is increased.
- Mengshi Yu
- , Congwei Tan
- & Hailin Peng
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Article
| Open AccessAll-natural 2D nanofluidics as highly-efficient osmotic energy generators
Researchers report a sustainable nanofluidic osmotic energy harvester made from natural montmorillonite clay nanosheets and recycled cellulose. Scaled-up films of 700 cm2 show power output of 8 W m−2 with stability over 30 days
- Jiadong Tang
- , Yun Wang
- & Tieyong Zuo
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Article
| Open AccessRoom-temperature low-threshold avalanche effect in stepwise van-der-Waals homojunction photodiodes
The avalanche or carrier-multiplication effect has the potential to improve the performance of photodetectors and solar cells, but usually requires high threshold energies. Here, the authors report stepwise WSe2 homojunctions exhibiting threshold energies approaching the semiconductor bandgap at room temperature.
- Hailu Wang
- , Hui Xia
- & Wei Lu
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Article
| Open AccessSelf-condensation-assisted chemical vapour deposition growth of atomically two-dimensional MOF single-crystals
2D MOFs have a variety of applications, including molecular separation and atomically thin electronics. Here authors demonstrate the preparation of monolayer and few-layer MOF single-crystals using a self-condensation-assisted CVD method.
- Lingxin Luo
- , Lingxiang Hou
- & Jian Zheng
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Article
| Open AccessRevealing hidden spin polarization in centrosymmetric van der Waals materials on ultrafast timescales
A major challenge for spin-based information technologies is the generation of spin polarization in otherwise nonmagnetic materials. Here, Arnoldi et al. demonstrate how ultrafast laser excitations can be used to generate spin polarization in a fullerene/tungsten diselenide heterostructure.
- B. Arnoldi
- , S. L. Zachritz
- & B. Stadtmüller
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Article
| Open AccessStaggered structural dynamic-mediated selective adsorption of H2O/D2O on flexible graphene oxide nanosheets
Graphene oxide is a promising material for molecular separation technologies. Here, the authors propose a realistic staggered stacking structure that plays a crucial role in H/D recognition in water adsorption, as well as high mobilities of water.
- Ryusuke Futamura
- , Taku Iiyama
- & Katsumi Kaneko
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Article
| Open AccessCollapse of carbon nanotubes due to local high-pressure from van der Waals encapsulation
vdW assembly of low-dimensional materials has proven the capability of creating structures with on-demand properties. Here, the authors report on the structural collapse of CNTs in conjunction with a metal-semiconductor junction induced by the VdW encapsulation.
- Cheng Hu
- , Jiajun Chen
- & Zhiwen Shi
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Article
| Open AccessConfining single Er3+ ions in sub-3 nm NaYF4 nanoparticles to induce slow relaxation of the magnetisation
Many of the most industrially important magnets require the addition of rare-earths to improve their coercivity and magnetic performance. Here, the authors place a single paramagnetic rare-earth ion, Er3+, in a diamagnetic nanoparticle, and study the slow relaxation of the resulting nanoparticles, providing vital information for the further development of rare-earth magnetic materials.
- Diogo A. Gálico
- , Emille M. Rodrigues
- & Muralee Murugesu
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Article
| Open AccessMagnetically propagating Hund’s exciton in van der Waals antiferromagnet NiPS3
Recently, excitons with unconventional properties were reported in a van der Waals antiferromagnet NiPS3. Here, using resonant inelastic x-ray scattering, the authors show that the formation of these excitons is primarily driven by Hund’s coupling and that they propagate similarly to two-magnon excitations.
- W. He
- , Y. Shen
- & M. P. M. Dean
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Article
| Open AccessSweat permeable and ultrahigh strength 3D PVDF piezoelectric nanoyarn fabric strain sensor
Electronic packaging causes piezoelectric sensors to be airtight, resulting in poor wearing comfort. To address this issue, the authors develop a 3D all-fiber piezoelectric sensor with sweat permeable using the advanced 3D textile technology.
- Wei Fan
- , Ruixin Lei
- & Shengbo Ge
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Article
| Open AccessFunctionalized MXene ink enables environmentally stable printed electronics
Here, authors demonstrate the electrohydrodynamic printing of alkylated 3,4-dihydroxy-L-phenylalanine functionalized MXene (AD-MXene) ink. The AD-MXene outperforms vacuum-deposited Au and Al electrodes, providing thin film transistors with good environmental stability due to its hydrophobicity.
- Tae Yun Ko
- , Heqing Ye
- & Insik In
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Article
| Open AccessFlower-shaped 2D crystals grown in curved fluid vesicle membranes
Thin crystals grown on rigid spherical templates of increasing curvature exhibit increased protrusions. Here, the authors demonstrate the opposite curvature effect on the morphology of molecularly thin crystals grown within elastic fluid membranes, like those of biological cells.
- Hao Wan
- , Geunwoong Jeon
- & Maria M. Santore
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Article
| Open AccessVisualized in-sensor computing
The communication of colour information stands as one of the most immediate and widespread methods of interaction among biological entities. Xu et al. report an electrochromic neuromorphic transistor employing color updates to represent synaptic weight for real-time visualised in-sensor computing.
- Yao Ni
- , Jiaqi Liu
- & Wentao Xu
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Article
| Open AccessAutonomous self-healing supramolecular polymer transistors for skin electronics
Integrating self-healing capabilities into skin-like stretchable transistors presents a persistent challenge. Here, by using a supramolecular polymer matrix, the authors develop autonomous self-healing transistors and skin-like logic circuits.
- Ngoc Thanh Phuong Vo
- , Tae Uk Nam
- & Jin Young Oh
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Article
| Open AccessHighly defective ultra-small tetravalent MOF nanocrystals
Crystalline materials’ properties are highly dependent on their size. Here authors report a general synthesis of ultrasmall (4–6 nm) and highly defective Zr/Hf-Metal Organic Frameworks nanoparticles that present enhanced peptide hydrolysis performance.
- Shan Dai
- , Charlotte Simms
- & Christian Serre
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Article
| Open AccessDualistic insulator states in 1T-TaS2 crystals
While monolayer of 1T-TaS2 is considered to be a Mott insulator, the nature of the bulk insulating state is debated. Here the authors introduce a ladder-type structures with fractional misalignment of adjacent layers, showing that it becomes a Mott insulator due to decoupling between the layers.
- Yihao Wang
- , Zhihao Li
- & Liang Cao
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