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Quantum Materials: Superconductivity and Topology
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Quantum Materials: Superconductivity and Topology

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

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 3820

Special Issue Editors

Prof. Dr. Guang-Han Cao

E-Mail Website
Guest Editor
Department of Physics, Zhejiang University, Hangzhou 310027, China
Interests: superconducting materials; iron-based superconductors; magnetic superconductors; strongly correlated materials; unconventional superconductivity; explorative synthesis and characterizations of transition metal compounds
Dr. Wen-He Jiao

E-Mail Website
Guest Editor
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Interests: superconducting materials; topological materials; strongly correlated materials; low-dimensional systems

Special Issue Information

Dear Colleagues,

Quantum Materials (QMs) refer to those solids with exotic physical properties and/or emergent phenomena stemming from quantum-mechanical principles. Examples of QMs include unconventional superconductors, topological quantum matter, quantum spin liquid, and so on. QMs not only provide an exceptional venue for discovering new state of matter, they are also highly expected to be applied for next-generation technologies coping with energy need and information innovation.

This Special Issue covers various research topics on those QMs that are mostly associated with superconductivity and topology. The topics include unconventional superconductivity, ferromagnetic superconductors, topological states of matter, topological superconductivity, and topological phase transitions, etc.

QMs are not only an emerging field but also an interdisciplinary science. We believe that this collection will contribute to the field with important discoveries and innovative ideas. Original research papers and review articles related to the above-mentioned topics are cordially invited.

Prof. Dr. Guang-Han Cao
Dr. Wen-He Jiao
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. 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

  • Quantum materials
  • Unconventional superconductivity
  • Ferromagnetic superconductors
  • Topological quantum matter
  • Topological superconductivity
  • Topological phase transitions

Published Papers (2 papers)

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Research

16 pages, 2238 KiB  
Article
Structural, Electronic, and Physical Properties of a New Layered Cr-Based Oxyarsenide Sr2Cr2AsO3
by Yi-Qiang Lin, Hao Jiang, Hua-Xun Li, Shi-Jie Song, Si-Qi Wu, Zhi Ren and Guang-Han Cao
Materials 2022, 15(3), 802; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15030802 - 21 Jan 2022
Cited by 1 | Viewed by 1650
Abstract
We report synthesis, crystal structure, and physical properties of Sr2Cr2AsO3. The new compound crystallizes in a Sr2GaO3CuS-type structure with two distinct Cr sites, Cr(1) in the perovskite-like block layers of “Sr3Cr [...] Read more.
We report synthesis, crystal structure, and physical properties of Sr2Cr2AsO3. The new compound crystallizes in a Sr2GaO3CuS-type structure with two distinct Cr sites, Cr(1) in the perovskite-like block layers of “Sr3Cr2O6” and Cr(2) in the ThCr2Si2-type layers of “SrCr2As2”. An inter-block-layer charge transfer is explicitly evidenced, which dopes electrons in the CrO2 planes and simultaneously dopes holes into the CrAs layers. Measurements of electrical resistivity, magnetization, and specific heat, in combination with density-functional theoretical calculations, indicate that the title material is an antiferromagnetic metal. The Cr(2) magnetic moments in the CrAs layers order at 420 K, while the Cr(1) spins in the CrO2 planes show quasi-two-dimensional magnetism with long-range ordering below 80 K. Both Néel temperatures are significantly reduced, compared with those of the cousin material Sr2Cr3As2O2, probably due to the intrinsic charge-carrier doping. Complex re-entrant magnetic transitions with a huge magnetic hysteresis were observed at low temperatures. Full article
(This article belongs to the Special Issue Quantum Materials: Superconductivity and Topology)
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9 pages, 2352 KiB  
Article
Possible Evidence for Berezinskii–Kosterlitz–Thouless Transition in Ba(Fe0.914Co0.086)2As2 Crystals
by Wen-He Jiao, Xiao-Feng Xu, Hao Jiang, Zhu-An Xu, Qing-Hu Chen and Guang-Han Cao
Materials 2021, 14(21), 6294; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14216294 - 22 Oct 2021
Cited by 1 | Viewed by 1622
Abstract
In this study, we measure the in-plane transport properties of high-quality Ba(Fe0.914Co0.086)2As2 single crystals. Signatures of vortex unbinding Berezinskii–Kosterlitz–Thouless (BKT) transition are shown from both the conventional approach and the Fisher–Fisher–Huse dynamic scaling analysis, in which [...] Read more.
In this study, we measure the in-plane transport properties of high-quality Ba(Fe0.914Co0.086)2As2 single crystals. Signatures of vortex unbinding Berezinskii–Kosterlitz–Thouless (BKT) transition are shown from both the conventional approach and the Fisher–Fisher–Huse dynamic scaling analysis, in which a characteristic Nelson–Kosterlitz jump is demonstrated. We also observe a non-Hall transverse signal exactly at the superconducting transition, which is explained in terms of guided motion of unbound vortices. Full article
(This article belongs to the Special Issue Quantum Materials: Superconductivity and Topology)
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