Superconducting properties and materials articles within Nature Communications

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  • Article
    | Open Access

    The identification of broken symmetry states in underdoped cuprate superconductors via quantum oscillation measurements remains inconclusive. Here, Chan et al. report the reconstructed Fermi surface of HgBa2CuO4+δ comprises only a single pocket indicating a biaxial charge-density-wave order within each CuO2plane.

    • M. K. Chan
    • , N. Harrison
    •  & M. Greven

  • Article
    | Open Access

    Disorder localizes electrons, which is usually detrimental to the onset of superconductivity. Here, Petrović et al. report a disorder-enhanced superconducting instability in quasi-one dimensional Na2-dMo6Se6and suggest that this effect may originate from an intrinsically screened Coulomb repulsion.

    • A. P. Petrović
    • , D. Ansermet
    •  & C. Panagopoulos

  • Article
    | Open Access

    Different ground states of high-temperature superconductors reveal complex nature of magnetism. Here, Wang et al. report stripe and Néel spin fluctuations coexisting with non-magnetic nematic phase in FeSe, providing a viewpoint towards understanding the magnetism of cuprate and iron-based superconductors.

    • Qisi Wang
    • , Yao Shen
    •  & Jun Zhao

  • Article
    | Open Access

    Collective modes of amplitude and phase are decoupled in equilibrium systems, limiting the understanding of competing orders in correlated material. Here, Krull et al. report that a non-adiabatic pump pulse can induce an intricate coupling between Leggett and Higgs modes, providing a way to couple collective modes in non-equilibrium condition.

    • H. Krull
    • , N. Bittner
    •  & A. P. Schnyder

  • Article
    | Open Access

    Pairing interaction appears at room temperature in traditional superconductors with a Cooper instability in the Fermi sea. Here, Maier et al.report that in the pseudogap phase of cuprate, where this instability is absent, superconductivity arises from an increase in the strength of the spin fluctuation pairing interaction as the temperature decreases.

    • T. A Maier
    • , P. Staar
    •  & D. J. Scalapino

  • Article
    | Open Access

    Field-induced electronic structures with spatial, momentum and energy resolution reveal the nature of interaction among multiple phases in correlated materials. Here, Machida et al. report two magnetic field-induced electronic superstructures in Bi2Se2CaCu2O8+δ, evidencing competition between superconductivity and emerging states.

    • T. Machida
    • , Y. Kohsaka
    •  & T. Tamegai

  • Article
    | Open Access

    The nature of the magnetic ground state giving rise to the hourglass-shaped magnetic spectrum common among high-Tc superconductors is a matter of debate. Here, Babkevich et al. detect the presence of stripe charge order accompanied by quasi-one-dimensional antiferromagnetic order in La5/3Sr1/3CoO4, providing a natural explanation for this characteristic spectrum.

    • P. Babkevich
    • , P. G. Freeman
    •  & A. T. Boothroyd

  • Article
    | Open Access

    Efficient qubit readout is essential for quantum information technology, which requires sufficient recognition of signal from noise. Here, Krantz et al. propose a simplified technique using a Josephson parametric oscillator, demonstrating single-shot readout performance of a superconducting qubit.

    • Philip Krantz
    • , Andreas Bengtsson
    •  & Jonas Bylander

  • Article
    | Open Access

    Cuprate superconductors show critical temperatures over 100 K, below which current flows without resistance. Here, the authors show how this temperature is set by material chemistry, leading to a reinterpretation of the cuprate phase diagram and suggestions of how to raise this temperature in the future.

    • Damian Rybicki
    • , Michael Jurkutat
    •  & Jürgen Haase

  • Article
    | Open Access

    The interplay between competing orders in high-temperature superconductors can be tuned by the application of magnetic fields. Here, Chang et al. report high field induced three-dimensional charge density wave in underdoped YBa2Cu3O6.67, which suggests Fermi surface reconstruction due to competing orders.

    • J. Chang
    • , E. Blackburn
    •  & S M Hayden

  • Article
    | Open Access

    In oxide materials, cation doping strongly influences the electronic correlations which promote diverse phenomena such as colossal magnetoresistance and superconductivity. Here, the authors use magnetic microscopy to image the effects of spatially ordered doping on electronic phase separation in oxide superlattices.

    • Yinyan Zhu
    • , Kai Du
    •  & Jian Shen

  • Article
    | Open Access

    Thin FeSe film on SrTiO3 substrate becomes a superconductor with a transition temperature over 100 K, yet the origin remains controversial. Here, Seo et al. show superconductivity below 20 K on the electron-doped surface of an FeSe crystal, suggesting a decisive role of interfacial effects in the enhancement of superconductivity.

    • J. J. Seo
    • , B. Y. Kim
    •  & Y. K. Kim

  • Article
    | Open Access

    Materials with topologically nontrivial band structures possess exotic electronic transport properties however they are naturally constrained below three dimensions. Here, the authors demonstrate how analogous systems with n−1 dimensions may be constructed from Josephson junctions of n-terminals.

    • Roman-Pascal Riwar
    • , Manuel Houzet
    •  & Yuli V. Nazarov

  • Article
    | Open Access

    Ferromagnetism and superconductivity possess inherently incompatible electronic spin ordering, and their coexistence requires elaborate engineering of material components. Here, the authors induce ferromagnetism in a two-dimensional superconducting crystal by the adsorption of hydrazine molecules.

    • Xiaojiao Zhu
    • , Yuqiao Guo
    •  & Yi Xie

  • Article
    | Open Access

    Quantized subgap states measured in the vortex cores of YBa2Cu3O7−δhave been challenging theory for over twenty years. Here, the authors show that these spectral features identified as vortex-core states exist independent of vortices, which calls for revisiting vortices in cuprate superconductors.

    • Jens Bruér
    • , Ivan Maggio-Aprile
    •  & Christoph Renner

  • Article
    | Open Access

    As a material's thickness decreases towards the atomic-scale, dimensional confinement may promote behaviour not found in the bulk, with potential technological applications. Here, the authors study superconductivity in TaS2as it is mechanically exfoliated towards the two-dimensional limit.

    • Efrén Navarro-Moratalla
    • , Joshua O. Island
    •  & Eugenio Coronado

  • Article
    | Open Access

    Superconducting circuits offer great promise for quantum computing, but implementations require careful shielding from control electronics. Here, the authors take inspirations from semiconductor spin-based qubits to design Josephson junctions quantum circuits whose qubits do not require microwave control.

    • Yun-Pil Shim
    •  & Charles Tahan

  • Article
    | Open Access

    Excessive excitation induced by overheating may deteriorate the resistance-free operation of superconductor-based devices. Here, Taupin et al. propose an effective control of excess quasiparticles and their spatial distribution in a mesoscopic superconducting disc by applying a small magnetic field.

    • M. Taupin
    • , I. M. Khaymovich
    •  & J. P. Pekola

  • Article
    | Open Access

    Materials which simultaneously exhibit superconductivity and topologically non-trivial electronic band structure possess potential applications in quantum computing but have yet to be found. Here, the authors find superconductivity in MoTe2, a material predicted to be topologically non-trivial.

    • Yanpeng Qi
    • , Pavel G. Naumov
    •  & Sergey A. Medvedev

  • Article
    | Open Access

    Electron doping is a powerful way to induce quantum phase transitions in materials and explore exotic states of matter. Here, Wen et al. present carefully-controlled potassium dosing in FeSe films and FeSe0.93S0.07bulk, which enhances superconductivity and induces other anomalous phases, revealing a complex phase diagram.

    • C. H. P. Wen
    • , H. C. Xu
    •  & D. L. Feng

  • Article
    | Open Access

    Understanding the nature of competing phases is a key to understanding the superconducting mechanism of unconventional superconductors. Here, the authors demonstrate a three-dimensional charge ordering state which competes with superconductivity in epitaxial YBa2Cu3O7-x thin films grown on La0.7Ca0.3MnO3substrates.

    • Junfeng He
    • , Padraic Shafer
    •  & Rui-Hua He

  • Article
    | Open Access

    The precise control and manipulation of the states of a multi-level quantum system are fundamental for quantum information processing. Here, the authors demonstrate the robust adiabatic manipulation of the quantum states of a superconducting circuit via stimulated Raman adiabatic passage.

    • K. S. Kumar
    • , A. Vepsäläinen
    •  & G. S. Paraoanu

  • Article
    | Open Access

    The heavy fermion compound URu2Si2displays a hidden order phase and superconductivity at low temperatures. Here, the authors perform substitution studies—partially replacing silicon with phosphorus—and study the effects on hidden order and superconductivity.

    • A. Gallagher
    • , K.-W. Chen
    •  & R. E. Baumbach

  • Article
    | Open Access

    Nanostructured superconductors allow dissipationless electrical transport to be exploited in technologically relevant devices. Here, the authors follow how detrimental fluctuations of the superconducting order parameter evolve in Al atomic contacts as their width is controlled by electromigration.

    • Xavier D. A. Baumans
    • , Dorin Cerbu
    •  & Joris Van de Vondel

  • Article
    | Open Access

    In cuprates, superconductivity exists in a narrow window at high electron doping concentration with strong antiferromagnetic correlations. Here, the authors demonstrate superconductivity with no effect of antiferromagnetic order in a cuprate for a wide electron doping range following a protect anneal process.

    • M. Horio
    • , T. Adachi
    •  & A. Fujimori

  • Article
    | Open Access

    Van der Waals heterostructures, made of stacked two-dimensional materials, hold promise for modern electronics. Here, the authors build van der Waals junction between superconducting two-dimensional materials and reveal that the junction works as Josephson junction.

    • Naoto Yabuki
    • , Rai Moriya
    •  & Tomoki Machida

  • Article
    | Open Access

    Whilst superconductivity is understood to emerge when electronic pairing allows for conduction without resistance, the mechanism at work in Fe-based superconductors is unclear. Here, the authors address the details of Fermi surfaces and associated gaps as well as the pairing mechanism of (Li1−xFex)OHFeSe via scanning tunnelling methods.

    • Zengyi Du
    • , Xiong Yang
    •  & Hai-Hu Wen

  • Article
    | Open Access

    Majorana fermions, particles which are their own antiparticles, are predicted to exist in systems combining superconductivity and topologically non-trivial band structure. Here, the authors propose means to create and manipulate such excitations in one-dimensional chains of adatoms on superconducting surfaces.

    • Jian Li
    • , Titus Neupert
    •  & Ali Yazdani

  • Article
    | Open Access

    A material weakly linking two superconductors may itself exhibit superconductivity whilst its material properties strongly influence the nature of the supercurrent. Here, the authors identify a supercurrent with p-wave symmetry in such a Josephson junction made of topologically non-trivial material.

    • J. Wiedenmann
    • , E. Bocquillon
    •  & L. W. Molenkamp

  • Article
    | Open Access

    Scaling photonic quantum information processing approaches remains challenging for integrated quantum optics. Here, Schuck et al.develop a hybrid superconducting-photonic circuit system to show how quantum interference and single-photon detectors can be combined in a scalable fashion on a silicon chip.

    • C. Schuck
    • , X. Guo
    •  & H. X. Tang

  • Article
    | Open Access

    Fluctuations of the phase of the superconducting wave function in one-dimensional nanosystems can lead to the appearance of metastable superconducting states. Here, the authors show that it is possible to manipulate the switching between such states by means of a small electrical noise in δ-MoN nanowires.

    • Jože Buh
    • , Viktor Kabanov
    •  & Dragan Mihailovic

  • Article
    | Open Access

    The exchange coupling strength between magnetic adsorbates and a superconducting surface determines the nature of the system’s quantum ground state. Here, the authors use scanning tunnelling microscopy to explore the ground state and excited state properties of manganese phthalocyanine adsorbed on a Pb(111) surface.

    • Nino Hatter
    • , Benjamin W. Heinrich
    •  & Katharina J. Franke

  • Article
    | Open Access

    The critical temperature of superconductors is proportional to the particle coupling energy, but this is different to conventional superfluids where this coupling is small. Here, the authors establish a relation between superconductivity and superfluidity and the topological properties of their band structures.

    • Sebastiano Peotta
    •  & Päivi Törmä

  • Article
    | Open Access

    Yttrium iron garnet is a ferrimagnetic insulator which demonstrates robust photon-spin coupling in hybrid microwave cavity systems. Here, the authors demonstrate a magnon gradient memory based on the dark modes of a strongly-coupled system of multiple yttrium iron garnet spheres.

    • Xufeng Zhang
    • , Chang-Ling Zou
    •  & Hong X. Tang

  • Article
    | Open Access

    Inducing phase transitions in atomically thin films of layered materials requires efficient electrostatic doping techniques to reach high carrier densities. Here, the authors present a doping technique which induces superconductivity by reaching high n-doping density in few-layered MoS2on glass substrates.

    • Johan Biscaras
    • , Zhesheng Chen
    •  & Abhay Shukla

  • Article
    | Open Access

    The phase diagram of type-II superconductors exhibits a multitude of different phases, whose study can shed light on domain nucleation and morphology. Here the authors use neutron grating interferometry to investigate the nucleation and phase changes of an intermediate mixed state in a niobium superconductor.

    • T. Reimann
    • , S. Mühlbauer
    •  & C. Grünzweig

  • Article
    | Open Access

    Open quantum systems are subject to dephasing that ultimately destroys the information they hold. Here, the authors use a superconducting qubit to show that dephasing also has a geometric origin, which can either reduce or restore coherence depending on the path of the quantum system in its Hilbert space.

    • S. Berger
    • , M. Pechal
    •  & S. Filipp

  • Article
    | Open Access

    Conventional superconductors were thought to be spin inert, but long-lived, spin-polarized excitations, or quasiparticles, have recently been observed. Here, the authors demonstrate quasiparticle spin resonance in the mesoscopic superconductor aluminium and estimate the spin coherence time.

    • C. H. L. Quay
    • , M. Weideneder
    •  & M. Aprili

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