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Nanomaterials
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Applications of Nanoparticles in Superconducting Materials
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Applications of Nanoparticles in Superconducting Materials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 6374

Special Issue Editors

Prof. Kristiaan Temst

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Guest Editor
Quantum Solid-State Physics, Department of Physics and Astronomy, University of Leuven, Leuven, Belgium
Interests: magnetism and superconductivity at the nanometer scale; multiferroic and magnetoelectric materials; X-ray and neutron scattering; ion beam synthesis and modification of materials
Prof. Margriet J. Van Bael

E-Mail Website
Guest Editor
Quantum Solid-State Physics, Department of Physics and Astronomy, University of Leuven, Leuven, Belgium
Interests: the coupling between electrical and magnetic phenomena (multiferroics, magnetoelectric hybrids, VCMA); topological materials (toplogical insulators, topological semimetals); the correlation between atomic lattice vibrations and superconductivity; graphene-superconductor hybrids

Special Issue Information

Dear Colleagues,

We warmly welcome contributions dealing with superconducting nanoscale materials (nanoparticles, nanowires, etc.) as well as applications of nanoparticles in superconducting materials. The scope of this Special Issue contains different aspects of such nanomaterials:

  • How does superconductivity behave at the nanometer scale, i.e., when the regime is reached where the size of the nanoparticles is comparable to or smaller than relevant superconducting length scales, such as the coherence length or the magnetic penetration depth?
  • How are the mechanisms of superconductivity (Cooper pair formation, phonons, exotic superconductivity, etc.) affected by or altered by the confinement that is imposed by the size of nanoparticles and nanowires?
  • How can nanoparticles be employed to tune and optimize the properties of superconducting materials, e.g., to enhance vortex pinning or to induce superconductivity in non-superconducting materials via, e.g., the proximity effect?

We encourage authors both of experimental as well as theoretical work to submit their contributions to this timely Special Issue that highlights the fascinating fundamental aspects and applications of superconductivity at the nanometer scale.

Prof. Kristiaan Temst
Prof. Margriet J. Van Bael
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • superconductivity
  • nanoparticles
  • confinement
  • Cooper pairs
  • critical parameters

Published Papers (2 papers)

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Research

13 pages, 4322 KiB  
Article
Imaging of Strong Nanoscale Vortex Pinning in GdBaCuO High-Temperature Superconducting Tapes
by David Collomb, Min Zhang, Weijia Yuan and Simon J. Bending
Nanomaterials 2021, 11(5), 1082; https://doi.org/10.3390/nano11051082 - 22 Apr 2021
Cited by 4 | Viewed by 2778
Abstract
The high critical current density of second-generation high-temperature superconducting (2G-HTS) tapes is the result of the systematic optimisation of the pinning landscape for superconducting vortices through careful engineering of the size and density of defects and non-superconducting second phases. Here, we use scanning [...] Read more.
The high critical current density of second-generation high-temperature superconducting (2G-HTS) tapes is the result of the systematic optimisation of the pinning landscape for superconducting vortices through careful engineering of the size and density of defects and non-superconducting second phases. Here, we use scanning Hall probe microscopy to conduct a vortex-resolved study of commercial GdBaCuO tapes in low fields for the first time and complement this work with “local” magnetisation and transport measurements. Magnetic imaging reveals highly disordered vortex patterns reflecting the presence of strong pinning from a dense distribution of nanoscale Gd2O3 second-phase inclusions in the superconducting film. However, we find that the measured vortex profiles are unexpectedly broad, with full-width-half-maxima typically of 6 μm, and exhibit almost no temperature dependence in the range 10–85 K. Since the lateral displacements of pinned vortex cores are not expected to exceed the superconducting layer thickness, this suggests that the observed broadening is caused by the disruption of the circulating supercurrents due to the high density of nanoscale pinning sites. Deviations of our local magnetisation data from an accepted 2D Bean critical state model also indicate that critical state profiles relax quite rapidly by flux creep. Our measurements provide important information about the role second-phase defects play in enhancing the critical current in these tapes and demonstrate the power of magnetic imaging as a complementary tool in the optimisation of vortex pinning phenomena in 2G-HTS tapes. Full article
(This article belongs to the Special Issue Applications of Nanoparticles in Superconducting Materials)
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9 pages, 2078 KiB  
Article
Anisotropy of the In-Plane and Out-of-Plane Resistivity and the Hall Effect in the Normal State of Vicinal-Grown YBa2Cu3O7−δ Thin Films
by Gernot Heine, Wolfgang Lang, Roman Rössler and Johannes D. Pedarnig
Nanomaterials 2021, 11(3), 675; https://doi.org/10.3390/nano11030675 - 9 Mar 2021
Cited by 4 | Viewed by 2429
Abstract
The resistivity and the Hall effect in the copper-oxide high-temperature superconductor YBa2Cu3O7-δ (YBCO) are remarkably anisotropic. Using a thin film of YBCO grown on an off-axis cut SrTiO3 substrate allows one to investigate these anisotropic [...] Read more.
The resistivity and the Hall effect in the copper-oxide high-temperature superconductor YBa2Cu3O7-δ (YBCO) are remarkably anisotropic. Using a thin film of YBCO grown on an off-axis cut SrTiO3 substrate allows one to investigate these anisotropic transport properties in a planar and well-defined sample geometry employing a homogeneous current density. In the normal state, the Hall voltage probed parallel to the copper-oxide layers is positive and strongly temperature dependent, whereas the out-of-plane Hall voltage is negative and almost temperature independent. The results confirm previous measurements on single crystals by an entirely different measurement method and demonstrate that vicinal thin films might be also useful for investigations of other layered nanomaterials. Full article
(This article belongs to the Special Issue Applications of Nanoparticles in Superconducting Materials)
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