Superconducting properties and materials articles within Nature Communications

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  • Article
    | Open Access

    The doping level of cuprate superconductors is usually difficult to determine. Here, Drozdov et al. report spectroscopic studies of in-situ modified Bi2Sr2CaCu2O8+δ, exploring not only the superconducting dome but also the previously inaccessible, non-superconducting regime of the phase diagram, with absolute determination of the doping level.

    • I. K. Drozdov
    • , I. Pletikosić
    •  & T. Valla

  • Article
    | Open Access

    Devices that generate electricity from electric fluctuations are promising for wireless power transmission as well as energy harvesting from environmental radio waves. Here the authors report the electric power generation from environmental fluctuations by using superconducting vortex strings in MoGe/YIG bilayer system.

    • J. Lustikova
    • , Y. Shiomi
    •  & E. Saitoh

  • Article
    | Open Access

    Emission of electromagnetic waves is expected when superconducting vortices cross sample edges, but such a radiation has not been observed so far. Here, Dobrovolskiy et al. evidence the electromagnetic radiation from vortices crossing the layers of a Mo/Si superlattice, where the emission spectra can be tuned by dc bias current and coarsely by the in-plane magnetic field.

    • O. V. Dobrovolskiy
    • , V. M. Bevz
    •  & M. Huth

  • Article
    | Open Access

    Understanding the ground state (GS) phase transitions in the quantum tunneling regime of a superconducting system is important for future qubit devices. Here, Shen, Heedt and Borsoi et al. report distinct types of fermion parity GS transitions as a function of magnetic field and gate voltages in a Coulomb-blockaded InSb–Al island.

    • Jie Shen
    • , Sebastian Heedt
    •  & Leo P. Kouwenhoven

  • Article
    | Open Access

    Whether the quantum Griffiths singularity state exists in one-dimensional (1D) systems remains elusive. Here, Zhang et al. report violation of the Pauli limit in the superconducting critical field and multiple phase transitions in the current-voltage hysteresis loops in a Ta2PdS5 nanowire, suggesting signatures of quasi-1D quantum Griffith singularity.

    • Enze Zhang
    • , Jinhua Zhi
    •  & Faxian Xiu

  • Article
    | Open Access

    A transmon qubit insensitive to magnetic fields is a crucial element in topological quantum computing. Here, Kroll et al. create graphene transmons by integrating monolayer graphene Josephson junctions into microwave frequency superconducting circuits, allowing them to operate in a parallel magnetic field of 1 T.

    • J. G. Kroll
    • , W. Uilhoorn
    •  & L. P. Kouwenhoven

  • Article
    | Open Access

    The emergence of superconductivity from the normal state in the cuprates above the transition temperature (Tc) has been controversial. Here, Pelc et al. report nonlinear conductivity, resulting from superconducting precursors only, vanishing exponentially above Tc both with temperature and with magnetic field.

    • Damjan Pelc
    • , Marija Vučković
    •  & Neven Barišić

  • Article
    | Open Access

    Encapsulated graphene Josephson junctions are promising for microwave quantum circuits but so far haven’t been explored. Here, Schmidt and Jenkins et al. observe a gate-tunable Josephson inductance in a microwave circuit based on a ballistic graphene Josephson junction embedded in a superconducting cavity.

    • Felix E. Schmidt
    • , Mark D. Jenkins
    •  & Gary A. Steele

  • Article
    | Open Access

    Studying quantum phase transitions at oxide interfaces provide a key to understand emergent two-dimensional (2D) superconductivity. Here, Chen et al. report comprehensive electronic phase diagram of the 2D electron system at the superconducting LaAlO3/SrTiO3 interface with independent control of carrier density and disorder.

    • Zhuoyu Chen
    • , Adrian G. Swartz
    •  & Harold Y. Hwang

  • Article
    | Open Access

    The electrodynamics of superconducting devices make them suitable for applications as detectors, amplifiers, and qubits. Here the authors show that resonators made from granular aluminum, which naturally realizes a network of Josephson junctions, have practically useful impedances and nonlinearities.

    • N. Maleeva
    • , L. Grünhaupt
    •  & I. M. Pop

  • Article
    | Open Access

    Exploring the orbital-selective Mott phase (OSMP) addresses the central issue of electron correlations in the iron-based superconductors. Here the authors theoretically study the dynamical spin structure factor in the block-OSMP regime and unveil momentum dependent characteristics for different spin excitation modes.

    • J. Herbrych
    • , N. Kaushal
    •  & E. Dagotto

  • Article
    | Open Access

    Magnetic atomic chains assembled on the surface of superconductors are a potential platform for engineering topological superconducting phases. Here the authors step towards this by manipulating magnetic atoms at interstitial sites to tune interatomic interactions and control the Yu-Shiba-Rusinov states that form.

    • A. Kamlapure
    • , L. Cornils
    •  & R. Wiesendanger

  • Article
    | Open Access

    The interplay between nematic, antiferromagnetic order and superconductivity in the iron pnictide superconductors remains obscured. Here, Wang et al. demonstrate well-separated nematic and Neel transition temperatures near optimal superconductivity in NaFe1−xNixAs and uncover local distortions which could account for rotational symmetry breaking common in iron pnictides.

    • Weiyi Wang
    • , Yu Song
    •  & Pengcheng Dai

  • Article
    | Open Access

    In many cuprates the high temperature superconducting state competes with a charge ordered phase that has been difficult to investigate in detail. Here the authors show three-dimensional charge order can be stabilized in YBCO films and studied without using the high magnetic fields that are necessary in the bulk material.

    • M. Bluschke
    • , A. Frano
    •  & B. Keimer

  • Article
    | Open Access

    Superconductor–semiconductor hybrid systems can bring together physical properties that are promising for fast and coherent quantum technology. Here, Hendrickx et al. realize such a system in planar germanium heterostructures demonstrating excellent quantum dots and tunable Josephson supercurrents.

    • N. W. Hendrickx
    • , D. P. Franke
    •  & M. Veldhorst

  • Article
    | Open Access

    The interplay between superconductivity and charge density wave (CDW) in 2H-NbSe2 is still not fully understood. Here, Cho et al. use controlled disorder to probe the interplay between these two phases in 2H-NbSe2 and find that superconductivity initially competes with CDW but eventually long-range CDW order assists superconductivity.

    • Kyuil Cho
    • , M. Kończykowski
    •  & R. Prozorov

  • Article
    | Open Access

    Small structural distortions may lead to dramatic modification in the electronic states in strong correlated materials. Here, Yim et al. image a strain-stabilized smectic electronic order in LiFeAs with both broken rotational symmetry and reduced translational symmetry.

    • Chi Ming Yim
    • , Christopher Trainer
    •  & Peter Wahl

  • Article
    | Open Access

    By designing superconducting materials the behavior of supercurrents can be controlled to give different emergent behavior. Ge et al. fabricate superconducting films in which currents form geometrically frustrated magnetic dipoles that can be tuned further by coupling to a vortex lattice.

    • Jun-Yi Ge
    • , Vladimir N. Gladilin
    •  & Victor V. Moshchalkov

  • Article
    | Open Access

    Coupling superconductors to mesoscopic systems leads to unusual effects that could be exploited in new devices including topological quantum computers. Here the authors present a double quantum dot with a Yu–Shiba–Rusinov ground state arising from the interplay of Coulomb interactions and superconductivity.

    • K. Grove-Rasmussen
    • , G. Steffensen
    •  & J. Nygård

  • Article
    | Open Access

    Quantum transport in superconductors remains difficult to study due to the typically small Fermi wavelength. Here, Thierschmann et al. demonstrate a superconducting quantum point contact with split gate technology at the superconducting LaAlO3/SrTiO3 interface and, due to its two-dimensionality, identify three regimes of quantum transport.

    • Holger Thierschmann
    • , Emre Mulazimoglu
    •  & Andrea D. Caviglia

  • Article
    | Open Access

    Quantum condensates may penetrate from one material to another due to the proximity effect. Here, Stolyarov et al. report the spatial evolution of quantum vortices from a superconducting Nb layer to a 50 nanometer thick diffusive metallic Cu-film, which is quite thick away from the interface.

    • Vasily S. Stolyarov
    • , Tristan Cren
    •  & Dimitri Roditchev

  • Article
    | Open Access

    Zero-energy flat bands indicate topological origin but their presence is usually energetically unfavorable. Here, Holmvall et al. propose an order parameter to quantify a phase transition associated with exotic topological properties in high-temperature superconductors hosting such flat bands.

    • P. Holmvall
    • , A. B. Vorontsov
    •  & T. Löfwander

  • Article
    | Open Access

    Two quantum critical behaviors appear in a two dimensional electron gas (2DEG) but its origin remains to be attested. Here, Sun et al. construct superconducting puddles-2DEG hybrid system by depositing tin nano-islands array on monolayer graphene where the two quantum critical behaviors are reproduced, suggesting the formation of inhomogeneous superconducting 2DEG.

    • Yinbo Sun
    • , Hong Xiao
    •  & Xi Wang

  • Article
    | Open Access

    Apart from the intensive efforts to explore topological properties in crystalline materials, the study of such properties in amorphous materials has been rare. Here, Pöyhönen et al. predict a topological superconducting phase in an ensemble of randomly distributed magnetic atoms on a superconducting surface.

    • Kim Pöyhönen
    • , Isac Sahlberg
    •  & Teemu Ojanen

  • Article
    | Open Access

    Monolayer transition-metal dichalcogenide (TMD) is promising to host features of topological superconductivity. Here, de la Barrera et al. study layered compounds, 2H-TaS2 and 2H-NbSe2, in their atomic layer limit and find a largest upper critical field for an intrinsic TMD superconductor.

    • Sergio C. de la Barrera
    • , Michael R. Sinko
    •  & Benjamin M. Hunt

  • Article
    | Open Access

    The disordering of the vortex lattice in a type-II superconductor is widely perceived to underpin unusual peaks in the temperature and field dependence of critical current. By contrast, here Toft-Petersen et al. find an order-disorder transition in a superconducting vanadium sample that is unconnected with peaks observed in critical current.

    • Rasmus Toft-Petersen
    • , Asger B. Abrahamsen
    •  & Mark Laver

  • Article
    | Open Access

    Superconductor-insulator transitions predominantly occur in highly disordered thin films. Here, Saito et al. report that a quantum metallic state transforms via the quantum Griffiths state to a weakly localized metal at high magnetic fields in a crystalline two-dimensional superconductor.

    • Yu Saito
    • , Tsutomu Nojima
    •  & Yoshihiro Iwasa

  • Article
    | Open Access

    Ideal tunnel junctions require high-quality, defect-free insulating barriers. Here, the authors demonstrate that van der Waals tunnel barriers atop bulk and ultrathin superconducting NbSe2 sustain a stable tunneling current and allow mapping of the spectral evolution of layered superconductors.

    • T. Dvir
    • , F. Massee
    •  & H. Steinberg

  • Article
    | Open Access

    Knowledge of critical current may provide important information to understand unconventional superconductivity and quantum critical behavior. Here, Jung et al. observe a peak in the pressure dependence of the zero-field critical current at a hidden quantum critical point in pure and Sn-doped heavy fermion superconductor CeRhIn5.

    • Soon-Gil Jung
    • , Soonbeom Seo
    •  & Tuson Park

  • Article
    | Open Access

    The nature of the doping dependent superconducting transition remains elusive for a two dimensional electron gas at the LaAlO3/SrTiO3 interface. Here, Singh et al. report superfluid stiffness and the superconducting gap energy at such interface as a function of carrier density.

    • G. Singh
    • , A. Jouan
    •  & N. Bergeal

  • Article
    | Open Access

    The understanding of the reemergence of pressure induced superconductivity in alkali-metal intercalated FeSe is hampered by sample complexities. Here, Sun et al. report the electronic properties of (Li1–xFe x )OHFe1–ySe single crystal not only in the reemerged superconducting state but also in the normal state.

    • J. P. Sun
    • , P. Shahi
    •  & J.-G. Cheng

  • Article
    | Open Access

    The superconducting gap structure of FeSe remains a debated issue. Here, Hashimoto et al. report momentum dependence of the gap in single- and multi-domain regions of orthorhombic FeSe crystals, revealing an unusual node lifting of the gap structure in multi-domain regions.

    • Takahiro Hashimoto
    • , Yuichi Ota
    •  & Shik Shin

  • Article
    | Open Access

    Superconductivity is evidenced in crystals and amorphous solids, but remains to be discovered in quasicrystals. Here, Kamiya et al. report the emergence of bulk superconductivity in Al-Zn-Mg quasicrystal at a very low transition temperature about 0.05 K.

    • K. Kamiya
    • , T. Takeuchi
    •  & N. K. Sato

  • Article
    | Open Access

    Electron-doped Sr2IrO4 is an intriguing material for searching for an unconventional superconducting state. Here the authors demonstrate that a spin density wave state exists in the metallic phase of electron-doped Sr2IrO4 which provides a link between the electronic phase diagrams of the hole-doped cuprates and the electron-doped iridates.

    • Xiang Chen
    • , Julian L. Schmehr
    •  & Stephen D. Wilson

  • Article
    | Open Access

    The desirable functional properties of complex oxide materials are often influenced by the presence of oxygen defects and epitaxial strain. Meyer et al. demonstrate the role of oxygen defect kinetics in the strain control of the superconducting transition temperature of LSCO.

    • Tricia L. Meyer
    • , Ryan Jacobs
    •  & Ho Nyung Lee

  • Article
    | Open Access

    Whether the normal state electronic correlations in cuprates are responsible for superconductivity remains elusive. Here, Li et al. report that such correlations turn into a renormalized coherent state starting well above the superconducting transition, and it leads to a strengthened superconductive pairing.

    • Haoxiang Li
    • , Xiaoqing Zhou
    •  & Daniel S. Dessau

  • Article
    | Open Access

    Controlling supercurrent pathways in a Josephson junction can lead to new functionalities. Here, Lahabi et al. demonstrate the tailoring of two distinct supercurrent channels in a ferromagnetic disk containing a magnetic vortex.

    • Kaveh Lahabi
    • , Morten Amundsen
    •  & Jan Aarts

  • Article
    | Open Access

    The determination of the phase diagram of cuprate superconductors involves chemical doping which introduces disorder and could mask intrinsic effects. Sterpetti et al. establish this phase diagram with transport measurements in ultra-thin samples by modulating the carrier density with an alternative electrostatic method.

    • Edoardo Sterpetti
    • , Johan Biscaras
    •  & Abhay Shukla

  • Article
    | Open Access

    High-temperature superconductors exhibit pseudogap behaviour that remains of unknown origin, despite many years of intensive study. Here the authors study the onset of the pseudogap under pressure, providing evidence that it requires a hole-like Fermi surface and constraining future theoretical developments.

    • N. Doiron-Leyraud
    • , O. Cyr-Choinière
    •  & Louis Taillefer

  • Article
    | Open Access

    One-dimensional topological superconductors are predicted to host zero-energy Majorana fermions at their extremities. Here, the authors observe dispersive edge states in a monolayer of Pb/Si(111) coupled to a ferromagnetic domain.

    • Gerbold C. Ménard
    • , Sébastien Guissart
    •  & Tristan Cren

  • Article
    | Open Access

    The description of a paramagnetic impurity on a superconductor remains elusive in the weak-coupling Kondo regime. Here, Hatter et al. correlate the energy of the Yu-Shiba-Rusinov bound states with the intensity of the Kondo resonances in such a regime, revealing a behavior well described by classical spin models.

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

  • Article
    | Open Access

    Proximity effect may induce unconventional superconductivity in the topologically protected surface states of a topological insulator, however experimental evidence remains rare. Here, Charpentier et al. report proximity effect induced superconductivity in nanoscale Josephson junctions and suggest an unconventional p-wave order parameter.

    • Sophie Charpentier
    • , Luca Galletti
    •  & Floriana Lombardi

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