Superconductors: Materials, Microstructures and Applications

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 4203

Special Issue Editors

Department of Electrical Engineerings, University of California, Los Angeles, CA 90095, USA
Interests: topological materials; superconductivity; scanning tunneling microscopy; molecular beam epitaxy

E-Mail Website
Guest Editor
Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA
Interests: low-temperature scanning tunneling microscopy & spectroscopy; molecular beam epitaxy; spin-polarized STM studies on iron-based superconductors as well as Skyrmions

Special Issue Information

Dear Colleagues,

Superconductors have attracted intensive research interest among the scientific community, both in fundamental understanding and intriguing applications. On one hand, the zero-resistance nature of the superconductors below the critical temperature shows great potential in realizing dissipationless electronics. On the other hand, the mechanism of the unconventional superconductivity remains a mystery, hindering the endeavor of improving the critical temperature of the superconductivity. Moreover, exotic phases and phenomena occur in the phase diagram of the unconventional superconductors, and these phases and phenomena are even less understood compared to the superconductivity itself. Despite that tremendous research efforts have been devoted to this field, and revolutionary progress has been achieved in the past few decades, there is still a lot that remained to be explored.

This special issue aims to cover the recent research development in superconducting materials and microstructures, as well as their application, in this regard, we propose the following topics:

  • Theoretical prediction and experimental discovery of new superconducting materials.
  • Search for high Tc superconductors.
  • Unveiling the mechanism for unconventional superconductivity.
  • Understanding the exotic phases and their properties in the phase diagram of unconventional superconductors.
  • Superconductor microstructures.
  • Superconductor-based low-consumption electronics.

Dr. Peng Deng
Dr. Huimin Zhang
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. Crystals is an international peer-reviewed open access monthly 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

  •  material science
  •  cuprates
  •  Fe-based superconductors
  •  strong correlation
  •  microstructures and micro-fabrication
  •  low-dimensionality
  •  dissipationless electronics

Published Papers (2 papers)

Order results
Result details
Select all
Export citation of selected articles as:

Research

8 pages, 1735 KiB  
Article
Stoichiometric Growth of Monolayer FeSe Superconducting Films Using a Selenium Cracking Source
by Kejing Zhu, Heng Wang, Yuying Zhu, Yunyi Zang, Yang Feng, Bingbing Tong, Dapeng Zhao, Xiangnan Xie, Kai Chang, Ke He and Chong Liu
Crystals 2022, 12(6), 853; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst12060853 - 17 Jun 2022
Cited by 1 | Viewed by 1794
Abstract
As a novel interfacial high-temperature superconductor, monolayer FeSe on SrTiO3 has been intensely studied in the past decade. The high selenium flux involved in the traditional growth method complicates the film’s composition and entails more sample processing to realize the superconductivity. Here [...] Read more.
As a novel interfacial high-temperature superconductor, monolayer FeSe on SrTiO3 has been intensely studied in the past decade. The high selenium flux involved in the traditional growth method complicates the film’s composition and entails more sample processing to realize the superconductivity. Here we use a Se cracking source for the molecular beam epitaxy growth of FeSe films to boost the reactivity of the Se flux. Reflection high-energy electron diffraction shows that the growth rate of FeSe increases with the increasing Se flux when the Fe flux is fixed, indicating that the Se over-flux induces Fe vacancies. Through careful tuning, we find that the proper Se/Fe flux ratio with Se cracked that is required for growing stoichiometric FeSe is close to 1, much lower than that with the uncracked Se flux. Furthermore, the FeSe film produced by the optimized conditions shows high-temperature superconductivity in the transport measurements without any post-growth treatment. Our work reinforces the importance of stoichiometry for superconductivity and establishes a simpler and more efficient approach to fabricating monolayer FeSe superconducting films. Full article
(This article belongs to the Special Issue Superconductors: Materials, Microstructures and Applications)
Show Figures

Figure 1

9 pages, 1515 KiB  
Article
Pressure Induced Superconductivity and Multiple Structural Transitions in CsCl-Type Cubic CeZn Single Crystal
by Xiaoling Shen, Hanming Ma, Dilip Bhoi, Jun Gouchi, Yoshiya Uwatoko, Alisha Dalan, Yukihiro Kawamura, Hiroyasu Sato, Izuru Umehara and Masatomo Uehara
Crystals 2022, 12(5), 571; https://0-doi-org.brum.beds.ac.uk/10.3390/cryst12050571 - 20 Apr 2022
Cited by 3 | Viewed by 1999
Abstract
CsCl-type cubic compound CeZn exhibits a paramagnetic (PM) to antiferromagnetic (AFM) first-order transition at TN ~ 30 K accompanied by a simultaneous structural transition from cubic to tetragonal structure as temperature decreases. Applying the pressure, the coupled magnetic and crystal structural transition [...] Read more.
CsCl-type cubic compound CeZn exhibits a paramagnetic (PM) to antiferromagnetic (AFM) first-order transition at TN ~ 30 K accompanied by a simultaneous structural transition from cubic to tetragonal structure as temperature decreases. Applying the pressure, the coupled magnetic and crystal structural transition becomes separated above 1.0 GPa and then the AFM order changes to ferromagnetic (FM). The FM ordering temperature decreases with further applying pressure and changes to a nonmagnetic state above ~3.0 GPa. In the nonmagnetic state, we discovered superconductivity below Tsc ~ 1.3 K over 5.5 GPa, which survives even up to 9.5 GPa. Investigation of single crystal X-ray diffraction at room temperature reveals that CeZn undergoes a sequential crystal structural change with increasing pressure from cubic at ambient pressure to the monoclinic structure at 8.2 GPa via tetragonal and orthorhombic structure. The detailed analysis of crystal structure in CeZn single crystal evidenced that the emergence of superconductivity is related to the orthorhombic-to-monoclinic transition implying a nonmagnetic origin of the Cooper pair formation. Full article
(This article belongs to the Special Issue Superconductors: Materials, Microstructures and Applications)
Show Figures

Figure 1

Back to TopTop