Electronics, photonics and device physics articles within Nature Physics

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  • 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

  • Article |

    A flux-tunable inductive coupling between two microwave superconducting resonators allows the operation of one of them as a two-level system. The lifetime is limited by the oscillator’s quality factor, offering potential for highly coherent qubits.

    • Andrei Vrajitoarea
    • , Ziwen Huang
    •  & Andrew A. Houck

  • Letter |

    The back-action of electrons can cool a nanomechanical oscillator to a few-quantum state when a current flows through a suspended nanotube. The electron back-action, which is attributed to an electrothermal effect, also induces self-oscillations.

    • C. Urgell
    • , W. Yang
    •  & A. Bachtold

  • 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

  • Letter |

    By coupling a superconducting qubit to surface acoustic waves the ‘giant atom’ regime is realized, where an atom is coupled to a field with wavelength orders of magnitude smaller than the atomic size. This leads to non-Markovian qubit dynamics.

    • Gustav Andersson
    • , Baladitya Suri
    •  & Per Delsing

  • News & Views |

    The superconductor–insulator phase transition is a quantum phenomenon that reveals a competition between the superconducting phase order and charge localization. Now, microwave spectroscopy is shown to be a promising approach to investigate this effect in controllable one-dimensional Josephson arrays.

    • Alexander D. Mirlin
    •  & Ivan V. Protopopov

  • News & Views |

    A theoretical analysis of exotic superconductors suggests that it is possible to manipulate the state of their order parameter with light. This will help engineer devices from topological superconductors by patterning regions with different orders.

    • Ivar Martin

  • 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

  • News & Views |

    The realization of a new topological state using an electrical-circuit approach establishes a flexible scheme that should enable further explorations into uncharted territory and, equally importantly, make experiments with topological states more broadly accessible.

    • Ling Lu

  • 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

  • News & Views |

    Light can be coupled to sound via Brillouin scattering, but realizing an efficient interaction isn’t trivial. A new type of resonator succeeds in doing so in a macroscopic device — boasting features that better its nanoscale counterparts.

    • Jeremy Bourhill
    •  & Michael E. Tobar

  • Article |

    Optomechanical coupling to macroscopic phonon modes of a bulk acoustic-wave resonator is demonstrated, providing access to high acoustics quality factors for phononic modes at high frequencies that are robust to decoherence.

    • W. H. Renninger
    • , P. Kharel
    •  & P. T. Rakich

  • 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

  • Commentary |

    The two-way symmetry of electromagnetic wave propagation can be broken effectively in optomechanical systems, enabling new devices that route photons in unconventional ways.

    • Ewold Verhagen
    •  & Andrea Alù

  • Letter |

    Semiconductor nanowires with superconducting leads are considered promising for quantum computation. The current–phase relation is systematically explored in gate-tunable InAs Josephson junctions, and is shown to provide a clean handle for characterizing the transport properties of these structures.

    • Eric M. Spanton
    • , Mingtang Deng
    •  & Kathryn A. Moler

  • Article |

    The ability to transfer quantum information from a memory to a flying qubit is important for building quantum networks. The very fast release of a multiphoton state in a microwave cavity memory into propagating modes is demonstrated.

    • Wolfgang Pfaff
    • , Christopher J. Axline
    •  & Robert J. Schoelkopf

  • 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 |

    Photoemission is usually driven by the energy of the illuminating laser pulses, but in the strong-field regime, the photoemission from an array of plasmonic nanoparticles is shown to be controlled by the light’s electric field.

    • William P. Putnam
    • , Richard G. Hobbs
    •  & Franz X. Kärtner

  • 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 |

    Experiments of the Aharonov–Bohm type typically involve particles that are charged and interact with a magnetic flux. Photons aren't the former and don't do the latter. Yet, an Aharonov–Bohm ring for photons has just been realized experimentally.

    • Ady Stern

  • 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

  • News & Views |

    When light and matter are strongly coupled, they lose their distinct character and merge into a hybrid state. Three experiments explore this exotic regime using artificial atoms, with promise for quantum technologies.

    • Kater Murch

  • Article |

    An optomechanical system made of an optical cavity filled with superfluid liquid helium provides the means to study phenomena involving different degrees of freedom than those in traditional solid-state resonators.

    • A. D. Kashkanova
    • , A. B. Shkarin
    •  & J. G. E. Harris

  • News & Views |

    Going around an exceptional point in a full circle can be a non-adiabatic, asymmetric process. This surprising prediction is now confirmed by two separate experiments.

    • Dieter Heiss

  • News & Views |

    Owing to the extreme sensitivity of a microscopic cantilever to optical forces, it is possible to uncover the fine structure of optical momenta and associated mechanical effects in evanescent fields.

    • Etienne Brasselet

  • Letter |

    Using a superconducting transmon qubit coupled to a microwave photonic crystal one can study intriguing strong-coupling effects such as the emergence of localized cavity modes within the photonic bandgap.

    • Yanbing Liu
    •  & Andrew A. Houck

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