Electronic properties and materials articles within Nature Communications

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  • Article
    | Open Access

    Molecular ferroelectrics contain stimuli-responsive structure and ionic building blocks, promising for ionically tailored multifunctionality. Here, the authors report molecular ionic ferroelectrics exhibiting the coexistence of room-temperature ionic conductivity and ferroelectricity.

    • Yulong Huang
    • , Jennifer L. Gottfried
    •  & Shenqiang Ren

  • Article
    | Open Access

    Twisted bilayer graphene hosts a sequence of electronic resets evidenced experimentally by characteristic spectroscopic cascades and sawtooth peaks in the inverse electronic compressibility. Here, the authors use combined dynamical mean-field theory and Hartree calculations to demonstrate that symmetry-breaking transitions are not necessary to observe cascades in twisted bilayer graphene.

    • Anushree Datta
    • , M. J. Calderón
    •  & E. Bascones

  • Article
    | Open Access

    Machine learning methods in condensed matter physics are an emerging tool for providing powerful analytical methods. Here, the authors demonstrate that convolutional neural networks can identify nematic electronic order from STM data of twisted double-layer graphene—even in the presence of heterostrain.

    • João Augusto Sobral
    • , Stefan Obernauer
    •  & Mathias S. Scheurer

  • Article
    | Open Access

    Transition metal monochalcogenides have been predicted to host interesting superconducting and topological properties, but their synthesis remains challenging. Here, the authors report a self-intercalation method driven by ionic liquid gating to obtain PdTe and NiTe single crystals from PdTe2 and NiTe2, respectively.

    • Fei Wang
    • , Yang Zhang
    •  & Shuyun Zhou

  • Article
    | Open Access

    Weak topological insulators offer promising topological state tunability for devices. Here, the authors use ARPES and first-principles calculations to evidence signatures of layer-selective quantum spin Hall channels that may be tunable with chemical potential for future applications.

    • Jingyuan Zhong
    • , Ming Yang
    •  & Yi Du

  • Article
    | Open Access

    Angular-resolved photoemission data is commonly used to determine the 3D electronic structure assuming free-electron final states. Strocov et al. show that even at high excitation energies the complexity of final states in various materials can go far beyond the free-electron picture.

    • V. N. Strocov
    • , L. L. Lev
    •  & J. Minár

  • Article
    | Open Access

    Tunability of the electronic properties of magnetic topological insulators is highly desired for future device applications. Here, the authors study the effect of substitutional impurities on the topological properties of Sb-doped MnBi2Te4 devices and uncover tunable layer-dependent electronic states.

    • Su Kong Chong
    • , Chao Lei
    •  & Kang L. Wang

  • Article
    | Open Access

    Solid helium is predicted to become a metal at extraordinarily high pressures of 25 TPa. Here, the authors predict that helium becomes an excitonic insulator just below the metallization pressure, and a superconductor just above the metallization pressure.

    • Cong Liu
    • , Ion Errea
    •  & Claudio Cazorla

  • Article
    | Open Access

    Hidden local order in disordered crystals is shown to have a strong impact on electronic and phononic band structures. Local correlations within hidden-order states can open band gaps, thereby changing properties without long-range symmetry breaking.

    • Nikolaj Roth
    •  & Andrew L. Goodwin

  • Article
    | Open Access

    Three-dimensional conductive hydrogels have promise in bioelectronics, yet achieving the desired conductivity and mechanical properties in 3D structured hydrogels is challenging. Here, the authors report a liquid-in-liquid 3D printing process for preparation of desirable PEDOT:PSS hydrogels.

    • Xinjian Xie
    • , Zhonggang Xu
    •  & Wenqian Feng

  • Article
    | Open Access

    Topological structures could spark promising functionalities in next generation nanoelectronics. Here, the authors report the realization of complex topological polar textures in epitaxial multiferroic BiFeO3 –SrTiO3 superlattices induced by competing electrical and mechanical boundary conditions.

    • Vivasha Govinden
    • , Peiran Tong
    •  & Daniel Sando

  • Article
    | Open Access

    The reliable fabrication of 2D heterostructures with controllable moiré patterns is important for the investigation of their emergent physical properties. Here, the authors report an alignment technique enabling the fabrication of double-aligned hBN/graphene/hBN supermoiré lattice structures with a yield close to 100%.

    • Junxiong Hu
    • , Junyou Tan
    •  & A. Ariando

  • Article
    | Open Access

    Negative longitudinal magnetoresistance refers to a decrease in resistance with the external magnetic field when the field direction is applied parallel to the current direction. It is considered an experimental signature of topological semimetals. Here, Zhang et al find clear and robust quadratic and linear negative longitudinal magnetoresistance in Pt3Sn and Pt3SnxFe1-x films.

    • Delin Zhang
    • , Wei Jiang
    •  & Jian-Ping Wang

  • Article
    | Open Access

    The Kondo hybridization typically occurs in heavy-fermion systems containing f electrons, although recently it has been reported in d-electron systems. Kim et al. report spectroscopic evidence of the Kondo hybridization in FeTe and discuss it role in the mechanism of the magnetic order.

    • Younsik Kim
    • , Min-Seok Kim
    •  & Changyoung Kim

  • Article
    | Open Access

    Hyperbolic phonon polaritons (HPhPs) in anisotropic van der Waals materials hold promise for nanophotonic applications, but their far-field characterization remains challenging. Here, the authors demonstrate the application of Raman spectroscopy in a backscattering configuration to determine the dispersion of HPhPs in thin GaSe crystals.

    • Alaric Bergeron
    • , Clément Gradziel
    •  & Sébastien Francoeur

  • Article
    | Open Access

    Designing efficient multistate resistive switching devices is promising for neuromorphic computing. Here, the authors demonstrate a reversible hydrogenation in WO3 thin films at room temperature with an electrically-biased scanning probe. The associated insulator to metal transition offers the opportunity to precisely control multistate conductivity at nanoscale.

    • Fan Zhang
    • , Yang Zhang
    •  & Pu Yu

  • Article
    | Open Access

    Metallic resistance of two-dimensional electron gases normally increases with temperature increasing. Here, the authors find a resistance decrease with increasing temperature at very low temperatures in two-dimensional electron metal described by Fermi liquid theory.

    • Sujatha Vijayakrishnan
    • , F. Poitevin
    •  & G. Gervais

  • Article
    | Open Access

    Graphene has many intriguing electronic properties. One of note is the absence of backscattering of electrons confined to a single valley. Spin-orbit interactions can allow backscattering, and here, Sun et al. use this spin-orbit coupling dependence of backscattering to measure the strength of the spin-orbit interaction in a graphene/tungsten selenide heterostructure.

    • Lihuan Sun
    • , Louk Rademaker
    •  & Christoph Renner

  • Article
    | Open Access

    A triangular-lattice organic conductor κ-(BEDT-TTF)4Hg2.89 Br8 is a promising doped spin liquid candidate which also exhibits superconductivity. Here the authors report thermoelectric measurements under pressure and find a quantum critical phase that could be correlated to BEC-like superconductivity.

    • K. Wakamatsu
    • , Y. Suzuki
    •  & K. Kanoda

  • Article
    | Open Access

    Using scanning tunnelling microscopy (STM) and spectroscopy, the authors show the visualization and manipulation of single polarons in monolayer CoCl2. Polarons can be created, moved, erased, and interconverted individually by the STM tip.

    • Min Cai
    • , Mao-Peng Miao
    •  & Ying-Shuang Fu

  • Article
    | Open Access

    Kramers nodal lines are doubly degenerate nodal lines connecting time-reversal invariant momenta, which are predicted to exist in achiral, non-centrosymmetric crystals with spin-orbit interactions. Here, the authors use ARPES and DFT to demonstrate signatures of Kramers nodal lines in a non-centrosymmetric charge density wave-hosting crystal.

    • Shuvam Sarkar
    • , Joydipto Bhattacharya
    •  & Sudipta Roy Barman

  • Article
    | Open Access

    Variational approaches combined with machine learning are promising for solving quantum many-body problems, but they often suffer from scaling and optimization issues. Here the authors demonstrate that a stochastic representation of wavefunctions enables reducing the ground state search to standard regression.

    • Hristiana Atanasova
    • , Liam Bernheimer
    •  & Guy Cohen

  • Article
    | Open Access

    Hund’s coupling, or the intra-atomic exchange, can drive novel quantum phases in multi-orbital systems, but this requires precise control of orbital occupancy. Ko et al. report an orbital-selective metal-to-insulator transition driven by Hund´s physics via symmetry-preserving strain tuning in monolayer SrRuO3.

    • Eun Kyo Ko
    • , Sungsoo Hahn
    •  & Tae Won Noh

  • Article
    | Open Access

    Twisted moiré heterostructures offer a highly tunable solid-state platform for exploring fundamental condensed matter physics. Here, the authors use scanning tunnelling microscopy to investigate the local electronic structure of the gate-controlled quantum anomalous Hall insulator state in twisted monolayer–bilayer graphene.

    • Canxun Zhang
    • , Tiancong Zhu
    •  & Michael F. Crommie

  • Article
    | Open Access

    Understanding the structure of the Kondo cloud formed by conduction electrons screening the impurity spin is a long-standing problem in many-body physics. Shim et al. propose the spatial and energy structure of the multichannel Kondo cloud, by studying quantum entanglement between the impurity and the channels.

    • Jeongmin Shim
    • , Donghoon Kim
    •  & H.-S. Sim

  • Comment
    | Open Access

    In this Comment, the authors discuss the current status, the challenges, and potential technological impact of exciton transport in transition metal dichalcogenide (TMD) monolayers, lateral and vertical heterostructures as well as moiré excitons in twisted TMD heterostacks.

    • Ermin Malic
    • , Raül Perea-Causin
    •  & Samuel Brem

  • Article
    | Open Access

    The charge density wave in Ta2NiSe7 cannot be easily explained by the Fermi surface nesting mechanism. Here, by using high-resolution ARPES, the authors reveal the absence of nesting at the primary vector q, but a backfolding at q and a possible nesting at 2q, suggesting a peculiar charge density wave state.

    • Matthew D. Watson
    • , Alex Louat
    •  & Gideok Kim

  • Article
    | Open Access

    The authors theoretically predict a superconducting diode effect in chiral nanotubes when a magnetic field is applied along the axis of the tube, where the diode efficiency is controlled by nanotube diameter and chiral angle. They further predict a non-reciprocal paraconductivity slightly above the superconducting transition temperature.

    • James Jun He
    • , Yukio Tanaka
    •  & Naoto Nagaosa

  • Article
    | Open Access

    Trivalent lanthanides are typically described using an ionic picture that leads to localized magnetic moments. Here authors show that the “textbook” description of lanthanides fails for Pr4+ ions where the hierarchy of single-ion energy scales can be tailored to explore correlated phenomena in quantum materials.

    • Arun Ramanathan
    • , Jensen Kaplan
    •  & Henry S. La Pierre

  • Article
    | Open Access

    Recent photo-emission experiments reported a strong nearest-neighbour attraction in a 1D cuprate, possibly originating from long-range electron-phonon coupling. By using state-of-the-art numerical methods, the authors show that a Hubbard model with extended electron-phonon terms reproduces experimental features.

    • Ta Tang
    • , Brian Moritz
    •  & Thomas P. Devereaux

  • Article
    | Open Access

    The quest to improve transparent conductors is a balance between increasing electrical conductivity and optical transparency. Here the authors demonstrate that both can be fulfilled by separating the optical and electrical conductivity directionality.

    • Carsten Putzke
    • , Chunyu Guo
    •  & Philip J. W. Moll

  • Article
    | Open Access

    A long-standing puzzle in the quantum critical behavior of cuprate superconductors has been the observed sub-linear power-law dependence of optical conductivity. Here, the authors present measurements of the optical spectra and resistivity of La2−xSrxCuO4, and develop a theoretical framework that yields a unified description of the optical spectra, resistivity and specific heat.

    • Bastien Michon
    • , Christophe Berthod
    •  & Antoine Georges

  • Article
    | Open Access

    Orbital order that does not break the overall crystal lattice symmetry is difficult to observe. Here, the authors use scanning tunneling microscopy on the superconductor CeCoIn5 to detect a signature of the orbital order in quasiparticle interference which is enhanced in the superconducting state, as predicted theoretically.

    • Weijiong Chen
    • , Clara Neerup Breiø
    •  & Andreas Kreisel

  • Article
    | Open Access

    The microscopic mechanism of the electric-field-driven insulator-metal transition in strongly correlated systems has been debated. Here the authors present a general theory based on a quantum avalanche mediated by the formation of in-gap ladder states from multiple-phonon emission.

    • Jong E. Han
    • , Camille Aron
    •  & Jonathan P. Bird

  • Article
    | Open Access

    The authors observe spectroscopic signature of obstructed surface states on the (0001) plane of SrIn2P2. Due to structural reconstruction, the surface state undergoes an adiabatic evolution and split into two branches, the upper of which being spatially localized with unusual negative differential conductance.

    • Xiang-Rui Liu
    • , Hanbin Deng
    •  & Chang Liu

  • Article
    | Open Access

    Electron screening is crucial to interpret inelastic X-ray scattering experiments in materials. Here the authors use a combined analysis based on the Bethe-Salpeter equation and time-dependent density functional theory to calculate the dielectric function and obtain the band gap of liquid water.

    • Igor Reshetnyak
    • , Arnaud Lorin
    •  & Alfredo Pasquarello

  • Article
    | Open Access

    Recently, high-temperature superconductivity has been reported in LaH10 and CeH10. Here, the authors report superconductivity in the alloy (La,Ce)H9-10 with Tc = 176 K at 100 GPa, providing an improved compromise between high transition temperature and low pressure requirements.

    • Wuhao Chen
    • , Xiaoli Huang
    •  & Tian Cui

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