Superconductor–insulator transition in La2 − xSr x CuO4 at the pair quantum resistance

Bollinger, A. T.; Dubuis, Guy; Yoon, Joonah; Pavuna, Davor; Misewich, James A.; Božović, I.

doi:10.1038/nature09998

Cited by 472 publications

(521 citation statements)

References 30 publications

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“…3b). Intriguingly, electric field-induced superconductivity, albeit at lower T c , has also been observed in TMDs such as MoS 2 and 1T-TiSe 2 (refs 83,84) whereas cuprate high-T c superconductors reveal a broadly tunable transition temperature 85 . Finally, we mention that non-equilibrium superconductivity is a rapidly …”

Section: Creating Macroscopic Quantum Coherencementioning

confidence: 99%

Towards properties on demand in quantum materials

2017

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Q uantum materials are on the ascent. This term embodies a vast portfolio of compounds and phenomena where ramifications of quantum mechanics are demonstrably real. Quantum materials are in the vanguard of contemporary physics in part because these systems afford an exceptional venue to uncover the many roles of symmetry, topology, dimensionality and strong correlations in macroscopic observables. Here we set out to explore the ways and means of creating new states of matter in quantum materials and manipulating their phases via external stimuli. Practical control of these properties is a precondition for exploiting quantum advantages in new photonic, electronic and energy technologies, a task of significant societal impact 1 . We will primarily focus on the following classes of quantum materials: transition metal oxides, Fe-and Cu-based high-T c superconductors, van der Waals semiconductors, topological insulators and Weyl semimetals, and, finally, graphene.The properties of quantum materials are anomalously sensitive to external stimuli. In these systems, interactions associated with spin, charge, lattice and orbital degrees of freedom are commonly on par with the electronic kinetic energy. A rather fragile balance between coexisting and competing ground states can be readily shifted via external stimuli, leading to a raft of quantum phases and transitions between them 2,3 . Furthermore, certain classes of driven quantum states (Fig. 1a and Box 1) are explicit products of coherent interaction between light and matter 4-6 . Alternatively, the properties of quantum materials can be pre-programmed by directly manipulating the electronic wavefunction and the attendant Berry phase that give rise to the anomalous velocity of electrons in a solid [7][8][9] . These complementary avenues of controls mean that investigations no longer need to be reduced to merely observing (in contrast, for example, to astrophysics). Instead, it is now feasible to attain, in a predictable fashion, 'properties on demand' by steering a quantum material towards a desirable ground, metastable or transient state. The past decade has witnessed an explosion in the field of quantum materials, headlined by the predictions and discoveries of novel Landau-symmetry-broken phases in correlated electron systems, topological phases in systems with strong spin-orbit coupling, and ultra-manipulable materials platforms based on two-dimensional van der Waals crystals. Discovering pathways to experimentally realize quantum phases of matter and exert control over their properties is a central goal of modern condensed-matter physics, which holds promise for a new generation of electronic/photonic devices with currently inaccessible and likely unimaginable functionalities. In this Review, we describe emerging strategies for selectively perturbing microscopic interaction parameters, which can be used to transform materials into a desired quantum state. Particular emphasis will be placed on recent successes to tailor electronic interaction parameters through th...

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Section: Creating Macroscopic Quantum Coherencementioning

confidence: 99%

Towards properties on demand in quantum materials

2017

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“…A Mott-insulator-to-metal transition was induced in the iron chalcogenide TlFe 1.6 Se 2 , though the induced carrier density was not sufficient to induce superconductivity [5]. Robust control on the transition temperature of cuprates was also claimed [6][7][8].…”

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confidence: 99%

Superconducting Transition Temperature Modulation in NbN via EDL Gating

Piatti

Sola

Daghero

et al. 2015

J Supercond Nov Magn

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We perform electric double layer gating experiments on thin films of niobium nitride. Thanks to a cross-linked polymer electrolyte system of improved efficiency, we induce surface charge densities as high as ≈ 2.8 × 10 15 cm −2 in the active channel of the devices. We report a reversible modulation of the superconducting transition temperature (either positive or negative depending on the sign of the gate voltage) whose magnitude and sign are incompatible with the confinement of the perturbed superconducting state to a thin surface layer, as would be expected within a naïve screening model. Keywords EDL gating · Superconductivity · Thin films · Niobium nitride · ScreeningIn recent years, electric double layer (EDL) gating has become a popular tool in condensed matter physics to tune the chemical potential of a wide range of materials well beyond the capabilities of standard solid-gate field-effect devices. Indeed, the EDL that builds up at the interface between the active channel and a polymer electrolyte solution (or an ionic liquid) acts as an effective nanoscale capacitor with extremely high capacitance [1]. In the field of superconductivity, EDL

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“…The metal-insulator and superconductor-insulator transitions were examined in cuprate superconductors. 41,42) Electricfield-induced superconductivity was also reported on layered superconductor compounds. 43,44) Electric field-effect switching of ferromagnetism and a charge ordered state was reported on ferromagnetic semiconductors, ferromagnetic thin film metals and oxide thin films, [45][46][47] which suggests that electric field-effect doping will be a standard method to examine the physical properties of a material, similar to high-pressure experiments and high magnetic field experiments.…”

Section: Electric Field-effect Doping On New Systemsmentioning

confidence: 99%

Electric-Field-Induced Superconductivity on an Organic/Oxide Interface

Ueno

2013

Jpn. J. Appl. Phys.

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Many superconductors have been developed by inducing charge carriers into a mother insulator compound. Chemical substitution of impurity atoms is usually used for inducing charge carriers, and this method is called “chemical doping”. Another method to tune charge carrier density is the electric field effect, which is widely utilized as a field-effect transistor. Here, we review recent progress in an electric field-effect study for developing a new oxide superconductor with an organic electrolyte gate. We first present a device configuration of an electric double layer transistor with oxide semiconductors, SrTiO3 and KTaO3. We then present the electrochemical interface properties and room-temperature device characteristics with various electrolytes. Finally, we present the superconductivity emerging at an organic/oxide interface, and discuss the phase diagram of electric-field-induced superconductors by comparing with superconductors obtained by chemical doping.

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Superconductor–insulator transition in La2 − xSr x CuO4 at the pair quantum resistance

Cited by 472 publications

References 30 publications

Towards properties on demand in quantum materials

Towards properties on demand in quantum materials

Superconducting Transition Temperature Modulation in NbN via EDL Gating

Electric-Field-Induced Superconductivity on an Organic/Oxide Interface

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