Electronic and spintronic devices articles within Nature Physics

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  • News & Views |

    Measurements of charge pumping in a quantum anomalous Hall device demonstrate that quantized Hall conductance does not require an edge to transport current, paving the way for the realization of other exotic electronic behaviour.

    • Christopher Eckberg

  • Article |

    Insulating states that are formed because of pairing between electrons and holes are known to exist in engineered bilayer structures in high magnetic fields. Now evidence suggests they can occur in a monolayer crystal at zero field.

    • Yanyu Jia
    • , Pengjie Wang
    •  & Sanfeng Wu

  • Article |

    Spin currents are generated from an antiferromagnet/heavy-metal heterostructure using optical excitation on picosecond timescales. This will have applications in antiferromagnetic spintronics.

    • Hongsong Qiu
    • , Lifan Zhou
    •  & Peiheng Wu

  • News & Views |

    The properties of anyons — two-dimensional particles that are neither fermions nor bosons — have been directly measured in a quantum Hall interferometer.

    • Rui-Rui Du

  • News & Views |

    Experiments show how the magnetic order in antiferromagnets can be manipulated through lattice vibrations excited by a laser. This induces a large and reversible magnetic moment at very high speed.

    • Dominik M. Juraschek
    •  & Prineha Narang

  • News & Views |

    Speed is of the essence when it comes to signal processing, but electronic switching times have reached a limit. Optically controlled tunnel currents across a nanoscale plasmonic gap could considerably accelerate future nanoelectronic devices.

    • Olga Smirnova

  • Article |

    Single-cycle interferometric autocorrelation measurements of electrons tunnelling across the gap of a plasmonic bowtie antenna and quantitative models provide insight into the physical interactions that drive the electron transfer.

    • Markus Ludwig
    • , Garikoitz Aguirregabiria
    •  & Daniele Brida

  • Letter |

    Few-layer magnetic materials sometimes show a different form of magnetism from their thicker equivalents. The authors contend that the mechanism is changes in the stacking order in the thin limit that modify the interlayer exchange interaction.

    • Dahlia R. Klein
    • , David MacNeill
    •  & Pablo Jarillo-Herrero

  • Article |

    Ferromagnetism is observed at ferroelastic domain walls in strontium titanate and its heterostructures with other oxides. Applying strain can reverse the magnetism. This suggests the possibility of device engineering using domain walls.

    • D. V. Christensen
    • , Y. Frenkel
    •  & B. Kalisky

  • Article |

    The realization of a two-dimensional quadrupole topological insulator—featuring gapless corner states but an otherwise insulating bulk and edge—establishes electrical circuits as a versatile platform for implementing topological band structures.

    • Stefan Imhof
    • , Christian Berger
    •  & Ronny Thomale

  • Letter |

    The entropy of a few-electron quantum system is measured for the first time by tracking the movement of charge in and out of the system. This could allow the unambiguous detection of Majorana fermions in solid state devices.

    • Nikolaus Hartman
    • , Christian Olsen
    •  & Joshua Folk

  • Review Article |

    An overview of how electromagnetic radiation can be used for probing and modification of the magnetic order in antiferromagnets, and possible future research directions.

    • P. Němec
    • , M. Fiebig
    •  & A. V. Kimel

  • Letter |

    Strongly interacting bosons have been predicted to display a transition into a superfluid ground state, similar to Bose–Einstein condensation. This effect is now observed in a double bilayer graphene structure, with excitons as the bosonic particles.

    • J. I. A. Li
    • , T. Taniguchi
    •  & C. R. Dean

  • Letter |

    Engineering moiré superlattices by stacking two-dimensional crystals could enable lateral superstructures to be formed where the local topological phase is periodically modulated, creating topological mosaics that are electrically switchable.

    • Qingjun Tong
    • , Hongyi Yu
    •  & Wang Yao

  • Article |

    Single atoms on a surface can be useful in spintronics applications, but their spin lifetime is limited by relaxation. By cleverly employing an STM tip, one can probe the spin dynamics and disentangle different effects leading to relaxation.

    • William Paul
    • , Kai Yang
    •  & Andreas J. Heinrich

  • News & Views |

    The discovery of intermediate high-spin multiexciton states with surprisingly long lifetimes provides new opportunities for engineering singlet fission, which may also provide an intriguing route to quantum information and spintronic applications.

    • Michael R. Wasielewski

  • Article |

    Experiments show how molecular structure affects the interaction and dynamics of the triplet exciton pairs produced when an excited singlet exciton decays via singlet fission — a process that could be harnessed for optoelectronic applications.

    • Leah R. Weiss
    • , Sam L. Bayliss
    •  & Jan Behrends

  • Letter |

    When laser light is focused onto graphene devices in a magnetic field a long-range photo-Nernst effect causes photocurrents to be generated along the free edges.

    • Helin Cao
    • , Grant Aivazian
    •  & Xiaodong Xu

  • News & Views |

    Graphene is a candidate spintronics material, but its weak intrinsic spin–orbit coupling is problematic. Intercalating graphene on an iridium substrate with islands of lead is now shown to induce a strong, spatially varying spin–orbit coupling.

    • Marko Kralj

  • News & Views |

    Non-reciprocal components are useful in microwave engineering and photonics, but they are not without their drawbacks. A compact design now provides non-reciprocity without resorting to magnets or nonlinearity.

    • Ari Sihvola

  • News & Views |

    Measurements of laser-induced magnetization dynamics suggest that spin currents can be generated on ultrafast timescales. Now it is shown that such currents may be capable of exerting ultrafast spin-transfer torques.

    • Karel Carva

  • News & Views |

    Spin pumping and spin-to-charge conversion in hybrid metal–organic devices reveal the physical mechanisms at work in semiconducting polymers.

    • Bert Koopmans

  • Letter |

    Measurements of the spin heat accumulation at the ferromagnetic/non-magnetic interface in nanopillar spin valves show that spin-up and spin-down electrons have different temperatures. This observation is important for the design of magnetic thermal switches and the study of inelastic spin scattering.

    • F. K. Dejene
    • , J. Flipse
    •  & B. J. van Wees

  • Letter |

    The fluctuation relations are a central concept in thermodynamics at the microscopic scale. These relations are experimentally verified by measuring the entropy production in a single-electron box coupled to two heat baths.

    • J. V. Koski
    • , T. Sagawa
    •  & J. P. Pekola

  • News & Views |

    An electrically controllable spin–orbit interaction at the surface of transition-metal dichalcogenides highlights the wealth of unexpected physics that two-dimensional systems can offer.

    • Alberto F. Morpurgo

  • Article |

    A magnetic field can lift the spin degeneracy of electrons. This Zeeman effect is an important route to generating the spin polarization required for spintronics. It is now shown that such polarization can also be achieved without the need for magnetism. The unique crystal symmetry of tungsten selenide creates a Zeeman-like effect when a monolayer of the material is exposed to an external electric field.

    • Hongtao Yuan
    • , Mohammad Saeed Bahramy
    •  & Yoshihiro Iwasa

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