Semiconductors articles within Nature Materials

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  • Article |

    Iodide-related defects pose serious challenges to the irradiation, thermal, light or reverse-bias stabilities of perovskite solar cells. Here, the authors find that by using the iodide/polyiodide capture and confine effects of perfluorodecyl iodide interfacing with perovskites, inverted perovskite solar cells achieve much improved stabilities.

    • Xiaoxue Ren
    • , Jifei Wang
    •  & Yongbo Yuan

  • Article |

    The authors imprint a moiré potential on a remote monolayer semiconductor through the moiré potential created in a remote MoSe2/WS2 moiré bilayer. The imprinted moiré potential enables gate-controlled generation of flat bands and correlated insulating states in the targeted monolayer.

    • Jie Gu
    • , Jiacheng Zhu
    •  & Kin Fai Mak

  • Article |

    The authors combine laser excitation and scanning tunnelling spectroscopy to visualize the electron and hole distributions in photoexcited moiré excitons in twisted bilayer WS2. This photocurrent tunnelling microscopy approach enables the study of photoexcited non-equilibrium moiré phenomena at atomic scales.

    • Hongyuan Li
    • , Ziyu Xiang
    •  & Feng Wang

  • News & Views |

    Quantum dots are engineered to use dopant states to achieve substantially enhanced impact ionization, which is potentially useful for light-harvesting applications.

    • Miri Kazes
    •  & Dan Oron

  • Article
    | Open Access

    Carrier multiplication generates multiple excitons for each absorbed photon but is normally limited by fast phonon-assisted relaxation. Here the authors achieve a threefold enhancement in multiexciton yields in Mn-doped PbSe/CdSe quantum dots, due to very fast spin-exchange interactions between Mn ions and the quantum dots that outpace energy losses arising from phonon emission.

    • Ho Jin
    • , Clément Livache
    •  & Victor I. Klimov

  • Editorial |

    After a decade of intense activity, the Graphene Flagship has helped to establish an incipient European graphene industry, yet mainstream commercialization of graphene products continues to be hindered by limited market readiness and industry acceptance.

  • Article |

    A method to manipulate the dislocation motion via a non-mechanical field alone has remained elusive. Here, using in situ TEM, it is directly observed that dislocation motion can be controlled solely by an external electric field.

    • Mingqiang Li
    • , Yidi Shen
    •  & Yu Zou

  • News & Views |

    An optical spectroscopy approach unravels different layer-dependent correlated electron phases in a two-dimensional semiconductor heterobilayer.

    • Mauro Brotons-Gisbert
    •  & Brian D. Gerardot

  • Article |

    The authors report on the emergence of intercell moiré exciton complexes where, in H-stacked WS2/WSe2 heterobilayers, the exciton’s hole from the WSe2 layer is surrounded by its bound electron’s wavefunction distributed among three adjacent moiré traps in the WS2 layer exhibiting an out-of-plane dipole and in-plane quadrupole.

    • Xi Wang
    • , Xiaowei Zhang
    •  & Xiaodong Xu

  • Letter |

    The realization of strongly correlated bosons in a solid-state lattice is challenging. Here, the authors trap interlayer excitons in an angle-aligned WS2/bilayer WSe2/WS2 multilayer moiré lattice and observe correlated insulating states.

    • Yihang Zeng
    • , Zhengchao Xia
    •  & Kin Fai Mak

  • News & Views |

    Transforming atomically thin materials by their magnetic neighbours reveals a surprising asymmetry that allows a versatile control of the valley degrees of freedom and band topology in van der Waals heterostructures.

    • Tong Zhou
    •  & Igor Žutić

  • Letter |

    Both bosonic and fermionic collective states can emerge in two-dimensional semiconductor lattices, and mixing these species can further expand the landscape of quantum phases. Here, the authors report Bose–Fermi mixtures of neutral and charged excitons and the emergence of dual-density waves in an electrostatic lattice in a GaAs bilayer.

    • Camille Lagoin
    • , Stephan Suffit
    •  & François Dubin

  • News & Views |

    Encoding information redundantly in a three-spin-qubit silicon device together with a novel quantum gate can protect against common errors.

    • Andre Saraiva
    •  & Stephen D. Bartlett

  • Article
    | Open Access

    Distinct electronic and optical properties emerge from quantum confinement in low-dimensional materials. Here, combining optical characterization and ab initio calculations, the authors report an unconventional excitonic state and bound phonon sideband in layered silicon diphosphide.

    • Ling Zhou
    • , Junwei Huang
    •  & Hongtao Yuan

  • Article |

    Cu2O is a promising platform to host Rydberg exciton–polaritons, where excitons strongly couple to cavity photons, however their realization has been elusive. Here, the authors report Rydberg exciton–polaritons with principal quantum numbers up to n = 6.

    • Konstantinos Orfanakis
    • , Sai Kiran Rajendran
    •  & Hamid Ohadi

  • News & Views |

    Metallic behaviour from a two-dimensional hole gas has been observed in solution-processed organic crystals, giving hope for this state of matter to be used in next-generation large-area soft electronics.

    • Mario Caironi

  • News & Views |

    A singlet-triplet hole spin qubit in a Ge quantum well is demonstrated to be fast, coherent, and compatible with operation at magnetic fields below 10 mT, opening the door to integration with superconducting technologies.

    • Floris Braakman
    •  & Pasquale Scarlino

  • Article |

    Scanning electron microscopy is used to image stacking domains in few-layer graphene, as well as moiré patterns in twisted van der Waals heterostructures, allowing for the correlation of the local structure with their excitonic properties.

    • Trond I. Andersen
    • , Giovanni Scuri
    •  & Mikhail D. Lukin

  • News & Views |

    Correlated real-space imaging and optical measurements of twisted MoSe2/WSe2 bilayers reveal strain-induced modulations of the moiré potential landscape, tuning arrays of 0D traps into 1D stripes and leading to substantial changes in the optical response of the heterostructures.

    • Long Zhang
    •  & Hui Deng

  • News & Views |

    The discovery of intrinsic quantum confinement effects in the form of oscillations in the optical absorption of formamidinium lead triiodide thin films is a vivid example of the surprising physical properties of these hybrid organic–inorganic materials.

    • Alejandro R. Goñi

  • Article |

    Oscillatory features in the absorption spectra of formamidinium lead triiodide perovskite thin films reveal the occurrence of intrinsic quantum confinement effects with confinement on the scale of tens of nanometres.

    • Adam D. Wright
    • , George Volonakis
    •  & Laura M. Herz

  • Article |

    Spin qubits in systems with strong spin–orbit coupling can be electrically controlled, but are usually affected by short coherence times. Here, coherence times up to 10 ms are obtained for strain-engineered hole states bound to boron acceptors in silicon 28.

    • Takashi Kobayashi
    • , Joseph Salfi
    •  & Sven Rogge

  • Letter |

    Anisotropic honeycomb crystal of black phosphorous is found to have pseudospin polarization greater than 95% at room temperature, attributed to the merging of Dirac cones. This bipolar pseudospin semiconductor may be useful for pseudospintronics.

    • Sung Won Jung
    • , Sae Hee Ryu
    •  & Keun Su Kim

  • Article |

    Type-II van der Waals interfaces formed by different two-dimensional materials enable robust interlayer optical transitions, regardless of common issues such as lattice constant mismatch, layer misalignment or whether the constituent compounds are direct or indirect band semiconductors.

    • Nicolas Ubrig
    • , Evgeniy Ponomarev
    •  & Alberto F. Morpurgo

  • Letter |

    Femtosecond pump–probe measurements of Coulomb correlations in WS2/WSe2 heterostructures reveal the interlayer exciton binding energy, determined from the 1s–2p resonance, as well as the dynamics of the conversion of intra- to interlayer excitons.

    • P. Merkl
    • , F. Mooshammer
    •  & R. Huber

  • News & Views |

    Impulsive Raman spectroscopy reveals how atoms are pushed into action by light absorption. The surprising sensitivity of this behaviour to the polaronic character of 2D perovskites opens up new avenues for tailored light–matter interactions.

    • Christoph Schnedermann
    • , Akshay Rao
    •  & Philipp Kukura

  • News & Views |

    A hybrid state of photons and electronic excitations in semiconductor quantum wells shows nonlinear behaviour at the level of single or few quanta, thus opening the door to the realization of photonic nonlinear quantum devices employing semiconductor technologies.

    • Dario Gerace
    • , Fabrice Laussy
    •  & Daniele Sanvitto

  • News & Views |

    Angle-resolved photoemission spectroscopy of MoS2 doped with Rb atoms unveiled the existence of polarons, whose presence seems to coincide with the onset of superconductivity.

    • Kai Rossnagel

  • Letter |

    Monatomic glasses formed by rapidly quenching Sb films from a molten state are shown to work as phase change materials for memory applications at room temperature.

    • Martin Salinga
    • , Benedikt Kersting
    •  & Abu Sebastian

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