Magneto-optics articles within Nature Physics

Featured

  • Article |

    Phonons that carry a large magnetic moment may be helpful for creating spintronic devices. Now this phenomenon is observed in an antiferromagnet and is enhanced by the critical fluctuations associated with a phase transition.

    • Fangliang Wu
    • , Song Bao
    •  & Qi Zhang

  • Letter |

    Ultrashort light pulses generate nanometre-scale wavepackets of magnons that propagate coherently and at high speed in an antiferromagnet. This pushes antiferromagnetic magnonics forward as a future platform for information processing.

    • J. R. Hortensius
    • , D. Afanasiev
    •  & A. D. Caviglia

  • Article |

    Inertial dynamics are observed in a ferromagnet. Specifically, a nutation is seen on top of the usual spin precession that has a lifetime on the order of 10 picoseconds.

    • Kumar Neeraj
    • , Nilesh Awari
    •  & Stefano Bonetti

  • Article |

    This paper shows how lattice distortions induced by a laser pulse can create a ferrimagnetic moment in an antiferromagnet. This mechanism gives a magnetic response that is orders of magnitude larger than using mechanical strain.

    • Ankit S. Disa
    • , Michael Fechner
    •  & Andrea Cavalleri

  • Article |

    The Kerr and Faraday effects enable routing of light in an applied magnetic field. Now a new class of magneto-optical phenomena is proposed and demonstrated in which light emission is controlled perpendicular to the external magnetic field.

    • F. Spitzer
    • , A. N. Poddubny
    •  & M. Bayer

  • Letter |

    Light can be used to directly excite phonon modes in condensed matter. Simultaneously exciting several modes in an antiferromagnetic rare-earth orthoferrite drives behaviour that mimics the application of a magnetic field.

    • T. F. Nova
    • , A. Cartella
    •  & A. Cavalleri

  • Letter |

    Kohn’s theorem states that the electron cyclotron resonance is unaffected by many-body interactions in a static magnetic field. Yet, intense terahertz pulses do introduce Coulomb effects between electrons—holding promise for quantum control of electrons.

    • T. Maag
    • , A. Bayer
    •  & M. Kira

  • News & Views |

    The valley index of an electron is a magnetic moment that can be initialized optically and probed electrically. Now, experiments reveal how magnetic fields can break the degeneracy for states with different valley indices.

    • Bernhard Urbaszek
    •  & Xavier Marie

  • Letter |

    Charge carriers in transition metal dichalcogenides have an extra degree of freedom known as valley pseudospin, which is associated with the shape of the energy bands. Experiments show that this pseudospin can be manipulated using magnetic fields.

    • G. Aivazian
    • , Zhirui Gong
    •  & X. Xu

  • Letter |

    Magnetic monopoles continue to be elusive. However, an experiment now shows that the interaction of an electron beam with the tip of a nanoscopically thin magnetic needle—a close approximation to a magnetic monopole field—generates an electron vortex state, as expected for a true magnetic monopole field.

    • Armand Béché
    • , Ruben Van Boxem
    •  & Jo Verbeeck

  • Article |

    Superfluorescence—the emission of coherent light from an initially incoherent collection of excited dipoles—is now identified in a semiconductor. Laser-excited electron–hole pairs spontaneously polarize and then abruptly decay to produce intense pulses of light.

    • G. Timothy Noe II
    • , Ji-Hee Kim
    •  & Junichiro Kono

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