Ferroelectrics and multiferroics articles within Nature

Featured

  • Article
    | Open Access

    The stacking of freestanding ferroelectric perovskite layers with controlled twist angles results in a peculiar pattern of polarization vortices and antivortices that emerges from the flexoelectric coupling of polarization to strain gradients.

    • G. Sánchez-Santolino
    • , V. Rouco
    •  & J. Santamaria

  • Article |

    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

  • Article
    | Open Access

    A single-element ferroelectric state is observed in a black phosphorus-like bismuth layer, in which the ordered charge transfer and the regular atom distortion between sublattices happen simultaneously and ferroelectric switching is further visualized experimentally.

    • Jian Gou
    • , Hua Bai
    •  & Andrew Thye Shen Wee

  • Article |

    The direct observation of in-plane charged domain walls in BiFeO3 ferroelectric films a few nanometres thick, their deterministic creation, manipulation and annihilation by applied voltage, as well the demonstration of their memristive functionality is reported.

    • Zhongran Liu
    • , Han Wang
    •  & He Tian

  • Article |

    The authors show a hysteretic behaviour of superconductivity as a function of electric field in bilayer Td-MoTe2, representing observations of coupled ferroelectricity and superconductivity.

    • Apoorv Jindal
    • , Amartyajyoti Saha
    •  & Daniel A. Rhodes

  • Article
    | Open Access

    A macroscopic and scalable pyroelectric energy harvester in the form of multilayer capacitors produces 11.2 J of electrical energy, with a pyroelectric material generating up to 4.43 J cm−3 per cycle.

    • Pierre Lheritier
    • , Alvar Torelló
    •  & Emmanuel Defay

  • Article |

    Multiple complementary optical signatures confirm the persistence of ferroelectricity and inversion-symmetry-breaking magnetic order down to monolayer NiI2, introducing the physics of type-II multiferroics into the area of van der Waals materials.

    • Qian Song
    • , Connor A. Occhialini
    •  & Riccardo Comin

  • Article |

    Analysing the structure of a PbTiO3 epitaxial layer sandwiched between SrRuO3 electrodes led to observation of a topology with two periodic modulations that form an incommensurate polar crystal, providing an analogue to incommensurate spin crystals.

    • Dorin Rusu
    • , Jonathan J. P. Peters
    •  & Marin Alexe

  • Article |

    A dynamical study shows that vortices of electrical polarization have higher frequencies and smaller size than their magnetic counterparts, properties that are promising for electric-field-driven data processing.

    • Qian Li
    • , Vladimir A. Stoica
    •  & Haidan Wen

  • Article |

    Enhanced switchable ferroelectric polarization is achieved in doped hafnium oxide films grown directly onto silicon using low-temperature atomic layer deposition, even at thicknesses of just one nanometre.

    • Suraj S. Cheema
    • , Daewoong Kwon
    •  & Sayeef Salahuddin

  • Letter |

    Imaging steady-state negative capacitance in SrTiO3/PbTiO3 superlattices with atomic resolution provides solid microscale support for this phenomenon.

    • Ajay K. Yadav
    • , Kayla X. Nguyen
    •  & Sayeef Salahuddin

  • Letter |

    The magnetization or polarization of domain states in multiferroics can be reversed while retaining the overall domain pattern, owing to the inherent versatility in coupling the large number of multiferroic order parameters.

    • N. Leo
    • , V. Carolus
    •  & M. Fiebig

  • Letter |

    The domain-wall structure and dynamics are found to enhance, rather than inhibit, the high-frequency performance of an intrinsically tunable material, obtaining ultralow loss and exceptional frequency selectivity.

    • Zongquan Gu
    • , Shishir Pandya
    •  & Jonathan E. Spanier

  • Letter |

    Two- and three-layer WTe2 exhibits spontaneous out-of-plane electric polarization that can be switched electrically at room temperature and is sufficiently robust for use in applications with other two-dimensional materials.

    • Zaiyao Fei
    • , Wenjin Zhao
    •  & David H. Cobden

  • Brief Communications Arising |

    • Alok S. Tayi
    • , Alexander K. Shveyd
    •  & Samuel I. Stupp

  • Letter |

    Molecular dynamics simulations of the Pb(Mg1/3,Nb2/3)O3–PbTiO3 relaxor reveal a multi-domain state analogous to the slush state of water that provides an explanation for the unusual properties of relaxors.

    • Hiroyuki Takenaka
    • , Ilya Grinberg
    •  & Andrew M. Rappe

  • Letter |

    Semiconducting single crystals of doped barium titanate and titanium dioxide exhibit a flexoelectric-like response upon bending that is much larger than in their undoped, insulating counterparts, reaching unprecedentedly large effective flexoelectric coefficients.

    • Jackeline Narvaez
    • , Fabian Vasquez-Sancho
    •  & Gustau Catalan

  • Letter |

    Molecular dynamics simulations of 90° domain walls in PbTiO3 are used to construct a nucleation-and-growth-based analytical model that quantifies the dynamics of many types of domain walls in various ferroelectrics, suggesting intrinsic domain-wall motion as a universal mechanism for ferroelectric switching.

    • Shi Liu
    • , Ilya Grinberg
    •  & Andrew M. Rappe

  • Letter |

    Negative capacitance is observed in a model system of multidomain ferroelectric–dielectric superlattices; the multidomain state can increase the temperature range over which negative capacitance can be observed.

    • Pavlo Zubko
    • , Jacek C. Wojdeł
    •  & Jorge Íñiguez

  • Letter |

    Ab initio calculations are used to identify the structural conditions under which a polar state in metals might be stabilized; this information is used to guide the experimental realization of new room-temperature polar metals.

    • T. H. Kim
    • , D. Puggioni
    •  & C. B. Eom

  • Letter |

    In material systems with several interacting degrees of freedom, the complex interplay between these factors can give rise to exotic phases; now superlattices consisting of alternating layers of PbTiO3 and SrTiO3 are found to exhibit an unusual form of ferroelectric ordering in the PbTiO3 layers, in which the electric dipoles arrange themselves into regular, ordered arrays of vortex–antivortex structures.

    • A. K. Yadav
    • , C. T. Nelson
    •  & R. Ramesh

  • Letter |

    Multiferroic devices that can switch magnetization with electric field at room temperature are desirable, but in BiFeO3 the required direct 180-degree switch is thermodynamically forbidden; here it is shown that such switching is possible because the kinetics of the switching process favours a two-step sequence of partial switching.

    • J. T. Heron
    • , J. L. Bosse
    •  & R. Ramesh

  • Letter |

    Most known ferroelectric photovoltaic materials have very wide electronic bandgaps (that is, they absorb only high-energy photons) but here a family of perovskite oxides is described that have tunable bandgaps, allowing their use across the whole visible-light spectrum.

    • Ilya Grinberg
    • , D. Vincent West
    •  & Andrew M. Rappe

  • Letter |

    Organic ferroelectrics with switchable electrical polarization would be an attractive prospect for applications if their Curie temperature—below which these materials display ferroelectric behaviour—could be raised to room temperature or above; this goal has now been achieved with a family of organic materials characterized by a supramolecular structural motif.

    • Alok S. Tayi
    • , Alexander K. Shveyd
    •  & Samuel I. Stupp

  • Letter |

    Ferroelectric ferromagnets — materials that are both ferroelectric and ferromagnetic — are of significant technological interest. But they are rare, and those that do exist have weak ferroelectric and ferromagnetic properties. Recently a new way of fabricating such materials was proposed, involving strain from the underlying substrate. This route has now been realized experimentally for EuTiO3. The work shows that a single experimental parameter, strain, can simultaneously control multiple order parameters.

    • June Hyuk Lee
    • , Lei Fang
    •  & Darrell G. Schlom

  • Letter |

    Ferroelectrics are electro-active materials that can store and switch their polarity, sense temperature changes, interchange electric and mechanical functions, and manipulate light. Subtle changes in the topology of certain chemical bonds have long been identified as a possible route for achieving ferroelectricity in organic molecular crystals. Ferroelectricity above room temperature is now demonstrated by applying an electric field to coherently align the molecular polarities in crystalline croconic acid.

    • Sachio Horiuchi
    • , Yusuke Tokunaga
    •  & Yoshinori Tokura

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