Electronic properties and materials articles within Nature Communications

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  • Article
    | Open Access

    Kagome metals continue to attract interest due to the coexistence of electronic correlations and band topology. Here the authors use proton gating to modulate disorder and carrier density in CsV3Sb5 nanoflakes, and show its effect on superconductivity, charge density wave and anomalous Hall effect.

    • Guolin Zheng
    • , Cheng Tan
    •  & Lan Wang

  • Article
    | Open Access

    Recent experiments have found a two-fold van Hove singularity (TvHS) in the kagome metal CsV3Sb5. Here, the authors use perturbative renormalization group calculations to find that the leading instability in a model of TvHS is a chiral condensate of electron-hole pairs, breaking time-reversal symmetry.

    • Harley D. Scammell
    • , Julian Ingham
    •  & Oleg P. Sushkov

  • Article
    | Open Access

    Hyperbolic lattices emulate particle dynamics equivalent to those in negatively curved space, with connections to general relativity. Here, the authors use electric circuits with a novel complex-phase circuit element to simulate hyperbolic graphene with negligible boundary contributions.

    • Anffany Chen
    • , Hauke Brand
    •  & Igor Boettcher

  • Article
    | Open Access

    Much recent work has focused on the kagome metals AV3Sb5 (A = K, Rb, and Cs), but studies of the monolayer form are only just beginning. Here, the authors theoretically study monolayer kagome metals, and predict modified van Hove singularities that lead to charge-density-wave doublets and d-wave superconductivity.

    • Sun-Woo Kim
    • , Hanbit Oh
    •  & Youngkuk Kim

  • Article
    | Open Access

    Kondo systems offer a rich platform to study the interplay between strong correlations and topology. Here the authors observe a large anomalous Hall conductivity in a Kondo ferromagnet USbTe, which they attribute to the Berry curvature originating from flat bands induced by the Kondo hybridization.

    • Hasan Siddiquee
    • , Christopher Broyles
    •  & Sheng Ran

  • Article
    | Open Access

    Pyroelectricity promises viable heat harvesting and sensing. Here, the authors identify transverse polarization ripple in pyroelectrics via heat localization and propagation decoupling and offer competitive power output to solar thermoelectrics.

    • Yi Zhou
    • , Tianpeng Ding
    •  & Ghim Wei Ho

  • Article
    | Open Access

    Bilayer sensors and sensor arrays with a catalytic CeO2 filter are proposed as a facile platform for high-performance gas sensors and electronic noses. Authors show the bilayer sensors enhance selectivity toward aromatic compounds, and the arrays provide comprehensive information such as gas concentration and composition.

    • Seong-Yong Jeong
    • , Young Kook Moon
    •  & Jong-Heun Lee

  • Article
    | Open Access

    Computational search for defect centers in semiconductors typically assumes that the defects realize the most thermodynamically stable configuration. Here the authors demonstrate, for a complex defect in silicon, that this is not always the case if the kinetics of defect formation is taken into account.

    • Peter Deák
    • , Péter Udvarhelyi
    •  & Adam Gali

  • Article
    | Open Access

    The nonlinear Hall effect (NLHE) results in a second-harmonic transverse voltage in response to alternating longitudinal current in zero magnetic field and has so far only been observed at low temperatures in bulk materials. Here, the authors observe bulk NLHE at room temperature in the Dirac material BaMnSb2, which will provide a large photocurrent for applications in THz detection.

    • Lujin Min
    • , Hengxin Tan
    •  & Zhiqiang Mao

  • Article
    | Open Access

    The nature of the superconductivity in the kagome metals AV3Sb5 (A = K, Rb, Cs) remains under debate. Here, using muon spin spectroscopy, the authors find that the superconductivity in RbV3Sb5 and KV3Sb5 evolves from nodal to nodeless with increasing pressure and the superconducting state breaks time-reversal symmetry after suppression of the charge order.

    • Z. Guguchia
    • , C. Mielke III
    •  & R. Khasanov

  • Article
    | Open Access

    The nature of the excitations in the pseudogap regime and their relation to superconductivity remain core issues in cuprate high-Tc superconductivity. Here, using resonant inelastic x-ray scattering, the authors find that high-energy excitons in optimally-doped Bi2Sr2CaCu2O8+δ are enhanced by the onset of superconductivity, an effect possibly explained in terms of electron fractionalization.

    • A. Singh
    • , H. Y. Huang
    •  & D. J. Huang

  • Article
    | Open Access

    In 2001 superconductivity with a high critical temperature of 39 K was discovered in MgB2, but efforts since then to identify other diboride-family superconductors have been mostly unsuccessful. Here, the authors report the discovery of superconductivity in pressurized WB2, originating from the formation of metastable stacking faults and twin boundaries that exhibit a local structure resembling MgB2.

    • J. Lim
    • , A. C. Hire
    •  & G. R. Stewart

  • Article
    | Open Access

    How electron energy damp to lattice vibrations (phonons) in MXenes has not yet been unraveled. Here, the authors demonstrate an energy damping channel in which the Ti3C2Tx plasmonic electron energy transfers to coherent phonons by nonthermal electron mediation after Landau damping, without involving electron-electron scattering.

    • Qi Zhang
    • , Jiebo Li
    •  & Xueming Yang

  • Article
    | Open Access

    Here, the authors show robust edge state transport in patterned nanoribbon networks produced on epigraphene—graphene that is epitaxially grown on non-polar faces of SiC wafers. The edge state forms a zero-energy, one-dimensional ballistic network with dissipationless nodes at ribbon–ribbon junctions.

    • Vladimir S. Prudkovskiy
    • , Yiran Hu
    •  & Walt A. de Heer

  • Article
    | Open Access

    The influence of ion-sidechain interactions on ion-insertion energetics in organic mixed ionicelectronic conductors (OMIECs) is not well understood. The authors show that a Gutmann Donor/Acceptor number framework captures ion-sidechain interactions and provides a rational basis for designing OMIECs.

    • Jibin J. Samuel
    • , Ashutosh Garudapalli
    •  & Naga Phani B. Aetukuri

  • Article
    | Open Access

    Fractal Hofstadter bands have become widely accessible with the advent of moiré superlattices, exemplified by the square-lattice Hubbard-Hofstadter model. Here, the authors predict that, due to a combination of repulsive interactions and Van Hove singularities, this model can realize both nodal and chiral topological superconductivity for different band fillings.

    • Daniel Shaffer
    • , Jian Wang
    •  & Luiz H. Santos

  • Article
    | Open Access

    Spin-state crossovers are phenomena where, under changes in temperature or pressure, the spin-state of an ion changes. In some materials, this spin-state crossover occurs simultaneously with a metal-insulator transition, driven by a valence transition. Control over such valence, spin-state, and metal-insulator transitions has much technological appeal, but, thus far, materials displaying this have been limited to cryogenic temperatures. Here, the authors show that in strained films of (Pr1-yYy)1- xCaxCoO3-δ, these transitions can be promoted to room temperature.

    • Vipul Chaturvedi
    • , Supriya Ghosh
    •  & Chris Leighton

  • Article
    | Open Access

    Doxorubicin is commonly used in cancer chemotherapy, but its cardiotoxicity from iron overload is one of the severe side effects. Here, the authors prepare magnesium hexacyanoferrate nanocatalysts to capture excess ferrous species and eliminate cytotoxic radical species in vitro and in vivo.

    • Minfeng Huo
    • , Zhimin Tang
    •  & Jianlin Shi

  • Article
    | Open Access

    Previous work has reported an axion insulator state in a layered topological antiferromagnet MnBi2Te4 evidenced by a zero Hall plateau. Here, in addition to the zero Hall plateau, the authors identify edge states in transport measurements at zero field which challenge the axion insulator interpretation.

    • Weiyan Lin
    • , Yang Feng
    •  & Jian Shen

  • Article
    | Open Access

    Mechanical strain is a powerful tuning knob for excitons in two-dimensional semiconductors. Here, the authors find that under the application of strain, dark and localized excitons in monolayer WSe2 are brought into energetic resonance, forming a new hybrid state that inherits the properties of the constituent species.

    • Pablo Hernández López
    • , Sebastian Heeg
    •  & Kirill I. Bolotin

  • Article
    | Open Access

    2D and 3D conductive MOFs have performed well in the fields of energy and catalysis. Here, authors synthesise a 1D conductive MOF in which DDA ligands are connected by double Cu ions, forming nanoribbon layers with π-d conjugated nanoribbon planes and out-of-plane π-π stacking, which facilitates charge transport along two dimensions.

    • Shengcong Shang
    • , Changsheng Du
    •  & Jianyi Chen

  • Article
    | Open Access

    Recent experiments have revealed a metal-insulator transition in a moire bilayer at band filling away from the strongly-correlated regime, which has rarely been addressed. Here the authors develop a theory that provides a complete understanding of experimental features in terms of a disorder-driven transition.

    • Yuting Tan
    • , Pak Ki Henry Tsang
    •  & Vladimir Dobrosavljević

  • Article
    | Open Access

    Quasiparticles, or broken Cooper pairs, are a major source of decoherence in superconducting qubits but their origin is debated. Pan et al. confirm the dominant mechanism due to photon absorption in the Josephson junction and demonstrate mitigation strategies based on tuning of the qubit geometry.

    • Xianchuang Pan
    • , Yuxuan Zhou
    •  & Dapeng Yu

  • Article
    | Open Access

    Clear electronic transport signatures of topological nodal-line semimetals have been lacking due to their complex electronic structure and the presence of topologically trivial states. Kim et al. demonstrate that the quantum transport response in slightly hole-doped SrAs3 is dominated by nodal-line fermions.

    • Hoil Kim
    • , Jong Mok Ok
    •  & Jun Sung Kim

  • Article
    | Open Access

    Recent experiments on a WSe2/WS2 hetero-bilayer detected incompressible charge ordered states considered to be generalized Wigner crystals. Here, by performing Monte Carlo simulations of a triangular moiré lattice, the authors study the phases which emerge on melting such charge-ordered states in partially filled moiré bands, finding two distinct nematic states and a hexagonal domain wall state.

    • Michael Matty
    •  & Eun-Ah Kim

  • Article
    | Open Access

    Designing efficient reconfigurable field effect transistors remains a challenge. Here, the authors develop a transistor with three distinct operation modes, realized directly on an industrial 22nm FDSOI platform, demonstrating a reconfigurable analog circuit element with signal follower, phase shifter, and frequency doubler operation.

    • Maik Simon
    • , Halid Mulaosmanovic
    •  & Jens Trommer

  • Article
    | Open Access

    The Su-Schrieffer-Heeger (SSH) model is a prototypical model of topological states, initially proposed to describe spinless electrons on a one-dimensional (1D) dimerized lattice. Here, the authors realize a 2D SSH model in a rectangular lattice of silicon atoms on a silver substrate, observing gapped Dirac cones by angle-resolved photoemission spectroscopy.

    • Daiyu Geng
    • , Hui Zhou
    •  & Baojie Feng

  • Article
    | Open Access

    Focused-ion beam (FIB) lithography enables high-resolution nanopatterning of 2D materials, but usually introduces significant damage. Here, the authors report a FIB-based fabrication technique to obtain high quality graphene superlattices with 18-nm pitch, which exhibit electronic transport properties similar to those of natural moiré systems.

    • David Barcons Ruiz
    • , Hanan Herzig Sheinfux
    •  & Frank H. L. Koppens

  • Article
    | Open Access

    It was recently predicted that, in addition to well-known spinon excitations, a 1D spin-trimer chain with periodic exchange couplings hosts novel composite excitations. Bera et al. experimentally demonstrate and characterize such excitations, termed doublons and quartons, in a spin-trimer compound Na2Cu3Ge4O12.

    • Anup Kumar Bera
    • , S. M. Yusuf
    •  & Sergei A. Zvyagin

  • Article
    | Open Access

    Materials with correlated localisation of percolating particles and emergent conductive paths can realise sharp transitions and high conductivities characteristic of the explosively-grown network. Here the authors exploit explosive percolation to realize a low-loading composite material with enhanced electrical properties by in-situ reduction of graphene oxide.

    • Manuela Meloni
    • , Matthew J. Large
    •  & Alan B. Dalton

  • Article
    | Open Access

    Three dimensional topological spin textures, such as hopfions and skyrmion tubes, have seen a surge of interest for their potential technological applications. They offer greater flexibility than their two dimensional counterparts, but have been hampered by the limited material platforms. Here, Grelier et al. look at aperiodic multilayers, and observe a three dimensional skyrmionic cocoon.

    • Matthieu Grelier
    • , Florian Godel
    •  & Nicolas Reyren

  • Article
    | Open Access

    Self-assembled PbSe quantum dot (QD) superlattices are a class of materials that promises novel mesoscale electronic properties due to electronic coupling between individual QDs. Here, the authors reveal distinct electronic states manifested by the quantum confinement of charge carriers in epitaxially formed necking between QDs.

    • Mahmut S. Kavrik
    • , Jordan A. Hachtel
    •  & Matt Law

  • Article
    | Open Access

    Charge carriers in graphene can be manipulated, e.g., collimated or focused, as in conventional optics but the efficiency of these processes remains low. Zhang et al. demonstrate interference of electrons in a novel graphene microcavity device and use it to enhance collimation efficiency of the electron flow.

    • Xi Zhang
    • , Wei Ren
    •  & Ke Wang

  • Article
    | Open Access

    Experimental evidence is given that upon the optical excitation of surface plasmon polaritons, a nonthermal electron population appears in the topmost domain of the plasmonic film directly coupled to the local fields.

    • Judit Budai
    • , Zsuzsanna Pápa
    •  & Péter Dombi

  • Article
    | Open Access

    Under strong laser fields, materials exhibit extreme non-linear optical response, such as high harmonic generation. These higher harmonics provide insights into electron behaviour in materials in sub-laser cycle timescale. Here, Cha et al study higher harmonic generation resulting from the laser driven motion of massless Dirac fermions in graphene.

    • Soonyoung Cha
    • , Minjeong Kim
    •  & Jonghwan Kim

  • Article
    | Open Access

    In strongly correlated materials multiple electronic phases can form simultaneously in real space, offering the potential of devices with multiple electronic properties, if such phase separation can be controlled. Here, Li et al study this electronic phase separation in LaMnO3/CaMnO3/PrMnO3 superlattice, and find a nano-network electronic phase separation resulting from local strain relaxation that persists through thermal cycling.

    • Qiang Li
    • , Tian Miao
    •  & Jian Shen

  • Article
    | Open Access

    The application of electric fields >1 V/nm in solid state devices could provide access to unexplored phenomena, but it is currently difficult to implement. Here, the authors develop a double-sided ionic liquid gating technique to generate electric fields as large as 4 V/nm across few-layer WSe2, leading to field-induced semiconductor-to-metal transitions.

    • Benjamin I. Weintrub
    • , Yu-Ling Hsieh
    •  & Kirill I. Bolotin

  • Article
    | Open Access

    The interaction between antiferromagnetic magnons and electrons sits at the heart of many strongly correlated systems, however, investigation has been hampered by a lack of clear-cut examples. Here, Yu et al directly observe a kink in the dispersion, a result of renormalization due to the electron-antiferromagnetic magnon interaction.

    • T. L. Yu
    • , M. Xu
    •  & D. L. Feng

  • Article
    | Open Access

    The origin of the degradation of nanodevices under electrical pulses still remains unknown. Here, Li et al. reveal the mechanism of direct electron-dislocation interaction by decoupling the electron wind force using in situ electropulsing, providing atomistic insight into the electroplasticity.

    • Xing Li
    • , Qi Zhu
    •  & Ze Zhang

  • Article
    | Open Access

    The lack of net magnetization in antiferromagnets makes them technologically promising, but it also makes detecting the spin orders challenging. Here, using electrical transport measurement, Song et al show how the planar Hall effect can detect different cluster magnetic multipoles in antiferromagnetic Nd2Ir2O7 film.

    • Jeongkeun Song
    • , Taekoo Oh
    •  & Tae Won Noh

  • Article
    | Open Access

    Twisted double bilayer graphene (tDBG) comprises two Bernal-stacked bilayer graphene sheets with a twist between them. Here, the authors report a strong anomalous Hall effect in the correlated-metal regime of tDBG, indicating time reversal symmetry breaking from orbital ferromagnetism, likely associated with valley polarization.

    • Manabendra Kuiri
    • , Christopher Coleman
    •  & Joshua Folk

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