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Novel Superconductors and Related Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 4810

Special Issue Editor


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Guest Editor
Tokyo Metropolitan University, Hachioji, Japan
Interests: superconductors; thermoelectric materials; water splitting photocatalysts; layered materials; crystal structure analysis; transport properties; first-principles calculation

Special Issue Information

Dear Colleagues,

The development of new materials has often led material scientists into attractive but unexplored fields on the journey towards their goal of achieving functionality. Typical examples are the discovery of cuprates and the Fe-based superconductors with a high transition temperature (Tc). Once the CuO2 plane and the Fe2An2 (An = P, As, S, Se, Te) layer was recognized as a basic structure of high-Tc superconductors, the vast quantity of related materials was investigated to identify new superconductors and to discuss their underlying physics. Interestingly, various functionalities can also be derived from the related compounds of these superconductors. For example, LaFeAsO is a typical parent phase of high-Tc Fe-based superconductors. On the other hand, the isostructural compound BiCuSeO is known to be a good thermoelectric material. Similarly, NaCoO2 is a well-known thermoelectric material, and LiCoO2 is also a leading material used as a cathode in rechargeable Li-ion batteries. The synthesis of new materials that exhibit various functionalities is of interest for the solid state physics and chemistry community.

This Special Issue represents a timely survey of the recent progress in the synthesis of new materials and their potential for application. The articles presented in this Special Issue will cover various topics, ranging from materials preparation, engineering, functionalization, and their various applications, such as superconductors, thermoelectrics, topological materials, photocatalysts, photovoltaics, and battery electrodes/electrolytes, to name but a few. The coverage will not be exhaustive, but it is our intention that this Special Issue will offer a unique glimpse into what has been achieved and what remains to be explored in the synthesis of new materials.

The Special Issue will cover the following non-exclusive list of topics:

  • Synthesis and characterization of new materials;
  • Superconductors;
  • Thermoelectric materials;
  • Topological materials;
  • Photocatalysts;
  • Photovoltaics;
  • Battery electrodes/electrolytes;
  • Solar hydrogen generation;
  • Doping to modify crystal/electronic structures;
  • Alternative synthesis method;
  • Local structure analysis;
  • First-principles study.

It is our pleasure to invite you to submit review articles, original papers, and communications for this Special Issue “Novel Superconductors and Related Materials”.

Dr. Yosuke Goto
Guest Editor

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. Materials 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 2600 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

  • superconductors
  • thermoelectric materials
  • water splitting photocatalysts
  • new materials
  • crystal structure analysis
  • transport properties
  • first-principles calculation

Published Papers (2 papers)

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Research

11 pages, 2732 KiB  
Article
Crystal Structure and Thermoelectric Transport Properties of As-Doped Layered Pnictogen Oxyselenides NdO0.8F0.2Sb1−xAsxSe2
by Kota Morino, Yosuke Goto, Akira Miura, Chikako Moriyoshi, Yoshihiro Kuroiwa and Yoshikazu Mizuguchi
Materials 2020, 13(9), 2164; https://doi.org/10.3390/ma13092164 - 7 May 2020
Cited by 1 | Viewed by 2267
Abstract
We report the synthesis and thermoelectric transport properties of As-doped layered pnictogen oxyselenides NdO0.8F0.2Sb1−xAsxSe2 (x ≤ 0.6), which are predicted to show high-performance thermoelectric properties based on first-principles calculation. The crystal structure [...] Read more.
We report the synthesis and thermoelectric transport properties of As-doped layered pnictogen oxyselenides NdO0.8F0.2Sb1−xAsxSe2 (x ≤ 0.6), which are predicted to show high-performance thermoelectric properties based on first-principles calculation. The crystal structure of these compounds belongs to the tetragonal P4/nmm space group (No. 129) at room temperature. The lattice parameter c decreases with increasing x, while a remains almost unchanged among the samples. Despite isovalent substitution of As for Sb, electrical resistivity significantly rises with increasing x. Very low thermal conductivity of less than 0.8 Wm−1K−1 is observed at temperatures between 300 and 673 K for all the examined samples. For As-doped samples, the thermal conductivity further decreases above 600 K. Temperature-dependent synchrotron X-ray diffraction indicates that an anomaly also occurs in the c-axis length at around 600 K, which may relate to the thermal transport properties. Full article
(This article belongs to the Special Issue Novel Superconductors and Related Materials)
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9 pages, 2114 KiB  
Article
Analysis of Electronic Properties from Magnetotransport Measurements on Ba(Fe1−xNix)2As2 Thin Films
by Ilya Shipulin, Stefan Richter, Aleena Anna Thomas, Kornelius Nielsch, Ruben Hühne and Victor Martovitsky
Materials 2020, 13(3), 630; https://doi.org/10.3390/ma13030630 - 31 Jan 2020
Cited by 1 | Viewed by 2036
Abstract
We performed a detailed structural, magnetotransport, and superconducting analysis of thin epitaxial Ba(Fe1−xNix)2As2 films with Ni doping of x = 0.05 and 0.08, as prepared by pulsed laser deposition. X-ray diffraction studies demonstrate the high crystalline [...] Read more.
We performed a detailed structural, magnetotransport, and superconducting analysis of thin epitaxial Ba(Fe1−xNix)2As2 films with Ni doping of x = 0.05 and 0.08, as prepared by pulsed laser deposition. X-ray diffraction studies demonstrate the high crystalline perfection of the films, which have a similar quality to single crystals. Furthermore, magnetotransport measurements of the films were performed in magnetic fields up to 9 T. The results we used to estimate the density of electronic states at the Fermi level, the coefficient of electronic heat capacity, and other electronic parameters for this compound, in their dependence on the dopant concentration within the framework of the Ginzburg–Landau–Abrikosov–Gorkov theory. The comparison of the determined parameters with measurement data on comparable Ba(Fe1−xNix)2As2 single crystals shows good agreement, which confirms the high quality of the obtained films. Full article
(This article belongs to the Special Issue Novel Superconductors and Related Materials)
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