Volume 11 Issue 12, December 2015

Volume 11 Issue 12

Magnetic atoms embedded in a niobium selenide superconductor are shown to give rise to a long range coherent bound state extending tens of nanometres.Letter p1013IMAGE: GERBOLD C. MÉNARDCOVER DESIGN: ALLEN BEATTIE

Editorial

  • Editorial |

    South Korea's march from fast follower to first mover in science and technology.

Commentary

  • Commentary |

    Bose–Einstein condensation in atomic gases was first observed in 1995. As we look back at the past 20 years of this thriving field, it's clear that there is much to celebrate.

    • Wolfgang Ketterle

Thesis

Books and Arts

Research Highlights

News and Views

  • News & Views |

    An experiment with cold atoms confined in an isotropic three-dimensional harmonic potential confirms the long-predicted non-damping oscillations of the breathing mode.

    • David Guéry-Odelin
    •  & Emmanuel Trizac
  • News & Views |

    Electric fields can controllably break the inversion symmetry of bilayer graphene, which can be harnessed to generate pure valley currents.

    • François Amet
    •  & Gleb Finkelstein
  • News & Views |

    Anharmonicity is a property of lattice vibrations governing how they interact and how well they conduct heat. Experiments on tin selenide, the most efficient thermoelectric material known, now provide a link between anharmonicity and electronic orbitals.

    • Joseph P. Heremans
  • News & Views |

    Cells exploit chemical waves to map the space around them, but their dynamics is difficult to replicate. Using a set of genes to generate a travelling front of protein concentration outside a living cell constitutes a remarkable achievement.

    • André Estevez-Torres
  • News & Views |

    Deep-sea sediments reveal the production sites of the heaviest chemical elements in the Universe to be neutron star mergers — rare events that eject large amounts of mass — and not core-collapse supernovae.

    • Friedrich-Karl Thielemann

Progress Article

  • Progress Article |

    Ultracold-atom experiments enable more flexibility in the study of quantum transport phenomena that are otherwise difficult to probe in solid-state systems. A survey of recent advances highlights the challenges and opportunities of this approach.

    • Chih-Chun Chien
    • , Sebastiano Peotta
    •  & Massimiliano Di Ventra

Letters

  • Letter |

    The mechanisms of decoherence in solid-state spin qubits subject to low magnetic fields turn out to be more complex than previously expected as an additional fast relaxation stage has now been identified.

    • Alexander Bechtold
    • , Dominik Rauch
    • , Fuxiang Li
    • , Tobias Simmet
    • , Per-Lennart Ardelt
    • , Armin Regler
    • , Kai Müller
    • , Nikolai A. Sinitsyn
    •  & Jonathan J. Finley
  • Letter |

    A cold-atom experiment confirms Boltzmann’s special case predicted more than a century ago: the ‘breathe’ mode of a gas in a perfectly isotropic three-dimensional harmonic potential is never damped by elastic collisions.

    • D. S. Lobser
    • , A. E. S. Barentine
    • , E. A. Cornell
    •  & H. J. Lewandowski
  • Letter |

    Magnetic atoms embedded in a niobium selenide superconductor are shown to give rise to a long-range coherent bound state extending tens of nanometres.

    • Gerbold C. Ménard
    • , Sébastien Guissart
    • , Christophe Brun
    • , Stéphane Pons
    • , Vasily S. Stolyarov
    • , François Debontridder
    • , Matthieu V. Leclerc
    • , Etienne Janod
    • , Laurent Cario
    • , Dimitri Roditchev
    • , Pascal Simon
    •  & Tristan Cren
  • Letter |

    Bound states in semiconductor–superconductor hybrids are shown to have parity lifetimes of over 10 milliseconds, suggesting that they could provide a platform for topological quantum computing.

    • A. P. Higginbotham
    • , S. M. Albrecht
    • , G. Kiršanskas
    • , W. Chang
    • , F. Kuemmeth
    • , P. Krogstrup
    • , T. S. Jespersen
    • , J. Nygård
    • , K. Flensberg
    •  & C. M. Marcus
  • Letter |

    Bilayer graphene can host topological currents that are robust against defects and are associated with the electron valleys. It is now shown that electric fields can tune this topological valley transport over long distances at room temperature.

    • Mengqiao Sui
    • , Guorui Chen
    • , Liguo Ma
    • , Wen-Yu Shan
    • , Dai Tian
    • , Kenji Watanabe
    • , Takashi Taniguchi
    • , Xiaofeng Jin
    • , Wang Yao
    • , Di Xiao
    •  & Yuanbo Zhang

Articles

  • Article |

    Using a superconducting circuit analogue of an atom in front of a mirror it is possible to shape the modes of the quantum vacuum and hide the atom from the vacuum fluctuations.

    • I.-C. Hoi
    • , A. F. Kockum
    • , L. Tornberg
    • , A. Pourkabirian
    • , G. Johansson
    • , P. Delsing
    •  & C. M. Wilson
  • Article |

    A theoretical study uncovers the role of entanglement in the relaxation dynamics of a one-dimensional Bose gas following coherent splitting, a relevant scenario for recent ultracold atom experiments.

    • Eriko Kaminishi
    • , Takashi Mori
    • , Tatsuhiko N. Ikeda
    •  & Masahito Ueda
  • Article |

    For small twist angles, electrons can resonantly tunnel between graphene layers in a van der Waals heterostructure. It is now shown that the tunnelling not only preserves energy and momentum, but also the chirality of electronic states.

    • M. T. Greenaway
    • , E. E. Vdovin
    • , A. Mishchenko
    • , O. Makarovsky
    • , A. Patanè
    • , J. R. Wallbank
    • , Y. Cao
    • , A. V. Kretinin
    • , M. J. Zhu
    • , S. V. Morozov
    • , V. I. Fal’ko
    • , K. S. Novoselov
    • , A. K. Geim
    • , T. M. Fromhold
    •  & L. Eaves
  • Article |

    Tin selenide is at present the best thermoelectric conversion material. Neutron scattering results and ab initio simulations show that the large phonon scattering is due to the development of a lattice instability driven by orbital interactions.

    • C. W. Li
    • , J. Hong
    • , A. F. May
    • , D. Bansal
    • , S. Chi
    • , T. Hong
    • , G. Ehlers
    •  & O. Delaire
  • Article |

    A combination of nonlinear optical experiments, piezoresponse force microscopy and Monte Carlo simulations resolves the correlation between polarization, topology and temperature for the hexagonal manganite YMnO3—a persistent ferroelectrics puzzle.

    • Martin Lilienblum
    • , Thomas Lottermoser
    • , Sebastian Manz
    • , Sverre M. Selbach
    • , Andres Cano
    •  & Manfred Fiebig
  • Article |

    Cells moving in a tissue undergo a rigidity transition resembling that of active particles jamming at a critical density—but the tissue density stays constant. A new type of rigidity transition implicates the physical properties of the cells.

    • Dapeng Bi
    • , J. H. Lopez
    • , J. M. Schwarz
    •  & M. Lisa Manning

Futures

  • Futures |

    Fermi resolved.

    • Norman Spinrad

Corrigendum