Superconductivity and Condensed Matter Physics

Dear Colleagues,

Following the discovery of superconductivity in cuprates, achieving high-temperature superconductivity has captured significant attention in recent years due to its potential for transformative applications in the electronics, computing, and energy fields. For example, iron-based superconductors have been a subject of interest due to their unconventional superconductivity and potential connection to high-temperature superconductors. Among these materials, FeSe has emerged as a fascinating subject of study because of its unusual phase diagram, which includes poor metallicity arising from Hund’s correlations, a superconducting state near the boundary of an orbital-selective Mott phase, and its potential for applications in quantum devices and topological quantum computing. Captivatingly, the high critical temperature (Tc) superconductivity of monolayer FeSe on perovskite oxides measures up to 80 K.

Recently, there have been numerous advancements in superconductors: (i) The discovery of room-temperature superconductivity in various hydrides under high pressure has ignited another wave of research focused on identifying high-temperature superconductors that can function at ambient conditions. (ii) The thrilling discovery of nickel-based superconductors has directed attention toward correlated quantum materials and their unconventional superconductivity. Unlike cuprates, the parent compound is rarely considered a charge transfer insulator and thus exhibits no evidence of long-range magnetic order. Moreover, as this parent compound is cooled, its resistivity increases—a characteristic often seen in heavy fermion superconductors and typically attributed to Kondo effects. (iii) Extensive research has been devoted to the spin-triplet superconductor UTe2 with the aim of developing robust qubits for quantum information processing and achieving topological superconductivity.

This Special Issue aims to advance the understanding and design of superconductors. We invite papers on, but not limited to, the following topics: design, synthesis, and characterization of superconductors; studies on bulk, nano-, and low-dimensional crystals; Cooper pairing mechanisms; and theoretical calculations of the electronic structures of parent, doped, and nanostructured superconductors.

Dr. Byungkyun Kang
Guest Editor

Manuscript Submission Information

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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 2100 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.

• superconductors 
• high-temperature superconductivity
• low-dimensional crystals
• hydrides
• spin-triplet superconductor
• nanostructure
• magnetism 
• topological quantum