Articles

  • Article |

    A detailed neutron scattering and muon spin relaxation study uncovers a continuum of magnetic excitations down to 35 mK in the pyrochlore lattice compound Ce2Zr2O7 with minimum chemical disorder, consistent with quantum spin liquid behaviour.

    • Bin Gao
    • , Tong Chen
    • , David W. Tam
    • , Chien-Lung Huang
    • , Kalyan Sasmal
    • , Devashibhai T. Adroja
    • , Feng Ye
    • , Huibo Cao
    • , Gabriele Sala
    • , Matthew B. Stone
    • , Christopher Baines
    • , Joel A. T. Verezhak
    • , Haoyu Hu
    • , Jae-Ho Chung
    • , Xianghan Xu
    • , Sang-Wook Cheong
    • , Manivannan Nallaiyan
    • , Stefano Spagna
    • , M. Brian Maple
    • , Andriy H. Nevidomskyy
    • , Emilia Morosan
    • , Gang Chen
    •  & Pengcheng Dai
  • Article |

    A quantum two-level system can be coherently excited by a phase-locked dichromatic electromagnetic field. This technique can make single-photon generation more efficient as the pump light does not overlap in frequency with the emitted single photons.

    • Yu-Ming He
    • , Hui Wang
    • , Can Wang
    • , M.-C. Chen
    • , Xing Ding
    • , Jian Qin
    • , Z.-C. Duan
    • , Si Chen
    • , J.-P. Li
    • , Run-Ze Liu
    • , C. Schneider
    • , Mete Atatüre
    • , Sven Höfling
    • , Chao-Yang Lu
    •  & Jian-Wei Pan
  • Article |

    Potential Majorana bound states are seen in the vortex cores of a transition metal dichalcogenide. The properties of the superconductor mean that the bound states are highly anisotropic, and can appear at higher temperatures than other materials.

    • Yonghao Yuan
    • , Jie Pan
    • , Xintong Wang
    • , Yuqiang Fang
    • , Canli Song
    • , Lili Wang
    • , Ke He
    • , Xucun Ma
    • , Haijun Zhang
    • , Fuqiang Huang
    • , Wei Li
    •  & Qi-Kun Xue
  • Article |

    This investigation of the two-dimensional superconductor–insulator transition in NbSe2 shows a strong dependence on the number of layers, and that fully dissipationless superconductivity is almost absent in the monolayer.

    • A. Benyamini
    • , E. J. Telford
    • , D. M. Kennes
    • , D. Wang
    • , A. Williams
    • , K. Watanabe
    • , T. Taniguchi
    • , D. Shahar
    • , J. Hone
    • , C. R. Dean
    • , A. J. Millis
    •  & A. N. Pasupathy
  • Article |

    The rate at which proteins are imported into the nucleus of a cell is shown to be regulated by their mechanical unfolding, a mechanism that identifies the nuclear pore machinery as a highly sensitive force detector.

    • Elvira Infante
    • , Andrew Stannard
    • , Stephanie J. Board
    • , Palma Rico-Lastres
    • , Elena Rostkova
    • , Amy E. M. Beedle
    • , Ainhoa Lezamiz
    • , Yong Jian Wang
    • , Samuel Gulaidi Breen
    • , Fani Panagaki
    • , Vinoth Sundar Rajan
    • , Catherine Shanahan
    • , Pere Roca-Cusachs
    •  & Sergi Garcia-Manyes
  • Article |

    Despite being a charge insulator, YbB12 behaves like a thermal metal. Low-temperature heat-transport measurements of this compound showed its gapless, itinerant and charge-neutral excitations.

    • Y. Sato
    • , Z. Xiang
    • , Y. Kasahara
    • , T. Taniguchi
    • , S. Kasahara
    • , L. Chen
    • , T. Asaba
    • , C. Tinsman
    • , H. Murayama
    • , O. Tanaka
    • , Y. Mizukami
    • , T. Shibauchi
    • , F. Iga
    • , J. Singleton
    • , Lu Li
    •  & Y. Matsuda
  • Article |

    Superionic states of matter simultaneously exhibit some of the properties of a liquid and of a solid. Detailed numerical simulations predict two superionic phases in mixtures of helium and water.

    • Cong Liu
    • , Hao Gao
    • , Yong Wang
    • , Richard J. Needs
    • , Chris J. Pickard
    • , Jian Sun
    • , Hui-Tian Wang
    •  & Dingyu Xing
  • Article |

    A general theoretical picture regarding the generation and the detection of extremely short pulses of squeezed vacuum light is provided, allowing the treatment of arbitrary wavepackets of quantum light intrinsically in the time domain.

    • Matthias Kizmann
    • , Thiago Lucena de M. Guedes
    • , Denis V. Seletskiy
    • , Andrey S. Moskalenko
    • , Alfred Leitenstorfer
    •  & Guido Burkard
  • Article |

    A general scheme for a resource-efficient probabilistic detection of multipartite entanglement is demonstrated on six-partite cluster states.

    • Valeria Saggio
    • , Aleksandra Dimić
    • , Chiara Greganti
    • , Lee A. Rozema
    • , Philip Walther
    •  & Borivoje Dakić
  • Article |

    Microtubules vary their length by gaining and shedding tubulin dimers dynamically at both ends. But evidence now suggests that dimers may also be incorporated into the middle of the shaft—calling into question existing models of growth dynamics.

    • Laura Schaedel
    • , Sarah Triclin
    • , Denis Chrétien
    • , Ariane Abrieu
    • , Charlotte Aumeier
    • , Jérémie Gaillard
    • , Laurent Blanchoin
    • , Manuel Théry
    •  & Karin John
  • Article |

    The long spin lifetimes observed in polymeric semiconductors hold promise for potential applications. A careful study untangles the main mechanism behind them.

    • Sam Schott
    • , Uday Chopra
    • , Vincent Lemaur
    • , Anton Melnyk
    • , Yoan Olivier
    • , Riccardo Di Pietro
    • , Igor Romanov
    • , Remington L. Carey
    • , Xuechen Jiao
    • , Cameron Jellett
    • , Mark Little
    • , Adam Marks
    • , Christopher R. McNeill
    • , Iain McCulloch
    • , Erik R. McNellis
    • , Denis Andrienko
    • , David Beljonne
    • , Jairo Sinova
    •  & Henning Sirringhaus
  • Article |

    Cells migrating within a collective naturally have restricted access to their surroundings. Experiments on micropatterned substrates now show that this confinement can regulate epithelial migration—governing cell morphology, forces and velocity.

    • Danahe Mohammed
    • , Guillaume Charras
    • , Eléonore Vercruysse
    • , Marie Versaevel
    • , Joséphine Lantoine
    • , Laura Alaimo
    • , Céline Bruyère
    • , Marine Luciano
    • , Karine Glinel
    • , Geoffrey Delhaye
    • , Olivier Théodoly
    •  & Sylvain Gabriele
  • Article |

    The principle of gauge invariance in quantum electrodynamics may be violated by approximate models in the presence of strong light–matter interactions. A general approach solves gauge ambiguities and offers a way to construct gauge-invariant Hamiltonians.

    • Omar Di Stefano
    • , Alessio Settineri
    • , Vincenzo Macrì
    • , Luigi Garziano
    • , Roberto Stassi
    • , Salvatore Savasta
    •  & Franco Nori
  • Article |

    A unified theory for the conduction of heat in materials is derived and shown to account for both the limiting regimes of periodic crystals and aperiodic glasses.

    • Michele Simoncelli
    • , Nicola Marzari
    •  & Francesco Mauri
  • Article |

    Stress relaxation in cell monolayers shows remarkable similarities with that of single cells, suggesting the rheology of epithelial tissues is mediated by the actomyosin cortex—with dynamics reminiscent of those on a cellular level.

    • Nargess Khalilgharibi
    • , Jonathan Fouchard
    • , Nina Asadipour
    • , Ricardo Barrientos
    • , Maria Duda
    • , Alessandra Bonfanti
    • , Amina Yonis
    • , Andrew Harris
    • , Payman Mosaffa
    • , Yasuyuki Fujita
    • , Alexandre Kabla
    • , Yanlan Mao
    • , Buzz Baum
    • , José J Muñoz
    • , Mark Miodownik
    •  & Guillaume Charras
  • Article |

    Machine learning techniques have latterly gained currency in condensed-matter physics, for example by identifying phase transitions. An unsupervised machine learning algorithm that identifies topological order is now demonstrated.

    • Joaquin F. Rodriguez-Nieva
    •  & Mathias S. Scheurer
  • Article |

    A study of how migrating cells optimize their search efficiency in the absence of directional cues reveals a self-organizing system that mediates superdiffusive motion—and sheds light on how cells navigate noisy environments.

    • I. Begemann
    • , T. Saha
    • , L. Lamparter
    • , I. Rathmann
    • , D. Grill
    • , L. Golbach
    • , C. Rasch
    • , U. Keller
    • , B. Trappmann
    • , M. Matis
    • , V. Gerke
    • , J. Klingauf
    •  & M. Galic
  • Article |

    The structural integrity of a cell’s nucleus is maintained by a polymer network known as the nuclear lamina. A simple biophysical theory reveals two regimes by which this network can rupture, depending on the structure of the nuclear envelope.

    • Dan Deviri
    • , Charlotte R. Pfeifer
    • , Lawrence J. Dooling
    • , Irena L. Ivanovska
    • , Dennis E. Discher
    •  & Samuel A. Safran
  • Article |

    Small-angle neutron scattering experiments of the layered antiferromagnet Ca3Ru2O7 reveal a metamagnetic spin texture that is indicative of an extraordinary coexistence of spin orders belonging to different symmetries.

    • D. A. Sokolov
    • , N. Kikugawa
    • , T. Helm
    • , H. Borrmann
    • , U. Burkhardt
    • , R. Cubitt
    • , J. S. White
    • , E. Ressouche
    • , M. Bleuel
    • , K. Kummer
    • , A. P. Mackenzie
    •  & U. K. Rößler
  • Article |

    Following a closed evolution in the Hilbert space, the state vector of a quantum system accumulates a geometric phase factor. A series of weak measurements reveal the origin of this in the back-action of any quantum measurement.

    • Young-Wook Cho
    • , Yosep Kim
    • , Yeon-Ho Choi
    • , Yong-Su Kim
    • , Sang-Wook Han
    • , Sang-Yun Lee
    • , Sung Moon
    •  & Yoon-Ho Kim
  • Article |

    High-resolution experiments attribute surprisingly large forces to the molecular motors helping a cell sense its surroundings. A two-state theory interprets the contractile properties of these motors as emergent features of their collective behaviour.

    • James Lohner
    • , Jean-Francois Rupprecht
    • , Junquiang Hu
    • , Nicola Mandriota
    • , Mayur Saxena
    • , Diego Pitta de Araujo
    • , James Hone
    • , Ozgur Sahin
    • , Jacques Prost
    •  & Michael P. Sheetz
  • Article |

    When a wound heals, different types of branched and bundled actin structure form, each designed to perform a specific function. Experiments and theory now suggest that the actin architecture depends on the stiffness of the cell’s surroundings.

    • Visar Ajeti
    • , A. Pasha Tabatabai
    • , Andrew J. Fleszar
    • , Michael F. Staddon
    • , Daniel S. Seara
    • , Cristian Suarez
    • , M. Sulaiman Yousafzai
    • , Dapeng Bi
    • , David R. Kovar
    • , Shiladitya Banerjee
    •  & Michael P. Murrell
  • Article |

    A bottom-up mathematical approach provides a framework for the design of mechanical networks of two- or three-dimensional frames composed of freely rotating rods and springs that achieve any desired coordinate motion.

    • Jason Z. Kim
    • , Zhixin Lu
    • , Steven H. Strogatz
    •  & Danielle S. Bassett
  • Article |

    Getting a picture of a d or f atomic orbital has been a challenge, but the X-ray scattering technique reported here enables direct transition from core s orbitals to the d orbitals so that their spatial shape can be mapped with no need for modelling.

    • Hasan Yavaş
    • , Martin Sundermann
    • , Kai Chen
    • , Andrea Amorese
    • , Andrea Severing
    • , Hlynur Gretarsson
    • , Maurits W. Haverkort
    •  & Liu Hao Tjeng
  • Article |

    Bacteria swimming near surfaces can get trapped in circular trajectories that lead nowhere, hindering efficient surface exploration. A harmful strain of bacteria is now shown to circumvent the problem by exploiting transient surface adhesion events.

    • Emiliano Perez Ipiña
    • , Stefan Otte
    • , Rodolphe Pontier-Bres
    • , Dorota Czerucka
    •  & Fernando Peruani
  • Article |

    By tuning the geometry of a two-dimensional sonic crystal, its one-dimensional helical edge states become gapped and zero-dimensional topological corner states emerge. The band topology is thus manifested in a hierarchy of dimensions.

    • Xiujuan Zhang
    • , Hai-Xiao Wang
    • , Zhi-Kang Lin
    • , Yuan Tian
    • , Biye Xie
    • , Ming-Hui Lu
    • , Yan-Feng Chen
    •  & Jian-Hua Jiang
  • Article |

    The same type of polymer network deforms cell membranes inward, to absorb external material, and outward, to facilitate signal transmission. Experiments and theory show that these deformations are regulated by membrane tension and network mesh size.

    • Camille Simon
    • , Rémy Kusters
    • , Valentina Caorsi
    • , Antoine Allard
    • , Majdouline Abou-Ghali
    • , John Manzi
    • , Aurélie Di Cicco
    • , Daniel Lévy
    • , Martin Lenz
    • , Jean-François Joanny
    • , Clément Campillo
    • , Julie Plastino
    • , Pierre Sens
    •  & Cécile Sykes
  • Article |

    A scattering resonance associated with quasi-bound diatomic levels trapped behind the centrifugal barrier has been observed in a quantum-degenerate potassium gas. Various measurements reveal the d-wave character of the collisions.

    • Xing-Can Yao
    • , Ran Qi
    • , Xiang-Pei Liu
    • , Xiao-Qiong Wang
    • , Yu-Xuan Wang
    • , Yu-Ping Wu
    • , Hao-Ze Chen
    • , Peng Zhang
    • , Hui Zhai
    • , Yu-Ao Chen
    •  & Jian-Wei Pan
  • Article |

    In situ measurements based on coherent X-ray spectroscopy are performed during the epitaxial growth of gallium nitride films, revealing a memory effect in the arrangement of islands formed on successive crystal layers.

    • Guangxu Ju
    • , Dongwei Xu
    • , Matthew J. Highland
    • , Carol Thompson
    • , Hua Zhou
    • , Jeffrey A. Eastman
    • , Paul H. Fuoss
    • , Peter Zapol
    • , Hyunjung Kim
    •  & G. Brian Stephenson
  • Article |

    An interferometer device demonstrates the interference of fractional quantum Hall effect edge states. This is a big step towards braiding non-Abelian anyons.

    • J. Nakamura
    • , S. Fallahi
    • , H. Sahasrabudhe
    • , R. Rahman
    • , S. Liang
    • , G. C. Gardner
    •  & M. J. Manfra
  • Article |

    Two-state micropatterns offer a unique platform to study cell migration. An equation of motion is inferred from a large ensemble of trajectories, revealing key differences in the nonlinear dynamics of healthy and cancerous cells.

    • David B. Brückner
    • , Alexandra Fink
    • , Christoph Schreiber
    • , Peter J. F. Röttgermann
    • , Joachim O. Rädler
    •  & Chase P. Broedersz
  • Article |

    A molecule placed in an optical microcavity behaves as a model two-level quantum system, as demonstrated via laser extinction and interaction with single photons.

    • Daqing Wang
    • , Hrishikesh Kelkar
    • , Diego Martin-Cano
    • , Dominik Rattenbacher
    • , Alexey Shkarin
    • , Tobias Utikal
    • , Stephan Götzinger
    •  & Vahid Sandoghdar
  • Article |

    A spectral study on a ferromagnet/superconductor heterostructure reveals the interaction between the spin-wave excitations in a magnetically ordered system (magnons) and the magnetic flux quanta formed in a superconductor (fluxons).

    • O. V. Dobrovolskiy
    • , R. Sachser
    • , T. Brächer
    • , T. Böttcher
    • , V. V. Kruglyak
    • , R. V. Vovk
    • , V. A. Shklovskij
    • , M. Huth
    • , B. Hillebrands
    •  & A. V. Chumak
  • Article |

    In the early Universe, fluctuations in the neutrino density produced a distinct shift in the temporal phase of sound waves in the primordial plasma. The size of this phase shift has now been constrained through baryon acoustic oscillation data.

    • Daniel Baumann
    • , Florian Beutler
    • , Raphael Flauger
    • , Daniel Green
    • , Anže Slosar
    • , Mariana Vargas-Magaña
    • , Benjamin Wallisch
    •  & Christophe Yèche
  • Article |

    Symmetry labels of materials under certain space groups can be used to indicate their band topology. Integrating that into first-principles band-structure calculations, new topological materials with a diversity of topological phenomena are discovered.

    • Feng Tang
    • , Hoi Chun Po
    • , Ashvin Vishwanath
    •  & Xiangang Wan
  • Article |

    The authors use surface acoustic waves, focused in a Gaussian geometry, to manipulate the spin state of divacancy defects in silicon carbide via mechanical driving. They demonstrate that shear strain is important in controlling the spin transitions.

    • Samuel J. Whiteley
    • , Gary Wolfowicz
    • , Christopher P. Anderson
    • , Alexandre Bourassa
    • , He Ma
    • , Meng Ye
    • , Gerwin Koolstra
    • , Kevin J. Satzinger
    • , Martin V. Holt
    • , F. Joseph Heremans
    • , Andrew N. Cleland
    • , David I. Schuster
    • , Giulia Galli
    •  & David D. Awschalom
  • Article |

    Actomyosin networks with rapid turnover self-organize within droplets, forming a dynamic steady-state with persistent flows. The networks exhibit homogeneous, density-independent contraction, implying that active stress scales with viscosity.

    • Maya Malik-Garbi
    • , Niv Ierushalmi
    • , Silvia Jansen
    • , Enas Abu-Shah
    • , Bruce L. Goode
    • , Alex Mogilner
    •  & Kinneret Keren
  • Article |

    Complex networks with identical topology may exhibit different dynamics. A systematic analysis of signal propagation in networks reveals the existence of three specific dynamic regimes that connect topological features to dynamic patterns.

    • Chittaranjan Hens
    • , Uzi Harush
    • , Simi Haber
    • , Reuven Cohen
    •  & Baruch Barzel
  • Article |

    Detailed neutron scattering, magnetic susceptibility and muon spin relaxation studies indicate the absence of long-range magnetic order in the quantum magnet TbInO3 down to 0.46 K— an observation consistent with quantum spin liquid behaviour.

    • Lucy Clark
    • , Gabriele Sala
    • , Dalini D. Maharaj
    • , Matthew B. Stone
    • , Kevin S. Knight
    • , Mark T. F. Telling
    • , Xueyun Wang
    • , Xianghan Xu
    • , Jaewook Kim
    • , Yanbin Li
    • , Sang-Wook Cheong
    •  & Bruce D. Gaulin
  • Article |

    Efficient photon pair sources connecting visible and telecommunication spectral regions are essential for viable long-distance fibre optic quantum communication architectures. A nanophotonic device is presented that allows kilometre-scale time–energy entanglement as an application.

    • Xiyuan Lu
    • , Qing Li
    • , Daron A. Westly
    • , Gregory Moille
    • , Anshuman Singh
    • , Vikas Anant
    •  & Kartik Srinivasan
  • Article |

    Parity-breaking antisymmetric spin exchange interaction is reported in clusters of five qubits within superconducting circuits. This allows the creation of chiral spin dynamics, with potential for future quantum simulations of chiral molecules.

    • Da-Wei Wang
    • , Chao Song
    • , Wei Feng
    • , Han Cai
    • , Da Xu
    • , Hui Deng
    • , Hekang Li
    • , Dongning Zheng
    • , Xiaobo Zhu
    • , H. Wang
    • , Shi-Yao Zhu
    •  & Marlan O. Scully
  • Article |

    A spectroscopic study of strontium titanate provides a method for transferring the vibrational energy of a low-frequency phonon mode to higher-frequency modes, with the potential to access elusive ‘silent’ modes.

    • M. Kozina
    • , M. Fechner
    • , P. Marsik
    • , T. van Driel
    • , J. M. Glownia
    • , C. Bernhard
    • , M. Radovic
    • , D. Zhu
    • , S. Bonetti
    • , U. Staub
    •  & M. C. Hoffmann