Unconventional High-Temperature Superconductors
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The behaviors of high-temperature superconductors (HTS) has been for decades one of the most fascinating puzzles of condensed-matter physics. The category of HTS has been initially populated only by the enigmatic cuprates, operating at temperatures far higher than traditional superconductors and revealing a rich tapestry of coexisting phases like antiferromagnetic order, pair density waves, charge density waves, etc.. Since 2008 the journey continued with the emergence of iron-based superconductors, characterized by a multiband structure, different types of pairing symmetries (such as s±, s+is and nodeless d-wave states), and an analogous proximity to (and influence from) magnetic phases.
Nowadays, several new players have entered the scene. For example, twisted layered materials, such as twisted bilayer graphene, can generates flat electronic bands at specific electron fillings (termed "magic fillings"), which leads to strong electron interactions and foster Cooper pair formation, essential for superconductivity. These flat bands may be topologically nontrivial, offering an exciting venue for the interplay between topological phases and unconventional superconductivity. Recently, bilayer nickelates under pressure have demonstrated superconductivity at about 80K, sparking a fresh wave of excitement and exploration. Their strong electron correlations, magnetic interactions, and unique electronic structure make them an intriguing platform for uncovering novel superconducting mechanisms. Each phase in this evolution has defied traditional paradigms, offering a tantalizing playground for researchers to probe the boundaries of known physics and paving the way for potentially transformative applications in energy transmission, transportation, and beyond.
In this topical collection "Unconventional High Temperature Superconductors," we invite you to contribute to the next chapter of this captivating journey of discovery. We encourage experimentalists and theorists to delve into the intricacies that govern these complex materials, shedding light on the intertwined phases and advancing the understanding in their relationship with superconductivity. Besides, we also welcome works on the discovery, tuning and optimization of new material systems that expand our toolkit for unraveling these mysteries.
Editors
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Ilya Eremin, PhD
Professor, Faculty of Physics and Astronomy, Ruhr University Bochum, Germany
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Lara Benfatto, PhD
Professor, Department of Physics, Sapienza University of Rome, Italy
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Meng Wang, PhD
Professor, School of Physics, Sun Yat-sen University, China
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Yuxuan Wang, PhD
Associate Professor, Department of Physics, University of Florida, USA
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Hai-Hu Wen, PhD
Professor, Center for Superconducting Physics and Materials, Nanjing University, China
Ilya Eremin, PhD, Ruhr University Bochum, Germany
Ilya Eremin is a professor at the Faculty of Physics and Astronomy of the Ruhr University Bochum. His research interests lie in the field of condensed matter, with a focus on the theoretical study of quantum many-body systems. He is particularly interested in the study of strongly correlated, low-dimensional electronic and magnetic systems, as well as unconventional and high-temperature superconductivity. He deals with systems that have geometric frustration in addition to low dimensionality and strong electronic correlations.
Lara Benfatto, PhD, Sapienza University of Rome, Italy
Lara Benfatto is a professor at the Department of Physics of Sapienza University of Rome. Her activity concerns theoretical problems connected to the physics of correlated electron systems in low dimensions. In particular she has been dealing with the physics of high-temperature cuprate and pnictide superconductors, graphene, disordered superconductors and superconducting heterostructures, with a particular focus on spectroscopic signatures of collective modes.
Wang Meng, PhD, Sun Yat-sen University, China
Wang Meng is a Professor at the School of Physics, Sun Yat-sen University. His research spans a wide range of areas, including neutron scattering studies of strongly correlated electronic materials, synthesis of new materials, and the growth of large single crystal samples. He is also involved in high-pressure electrical transport and structural research using diamond anvil cell technology. Additionally, his work extends to investigating the structural, electrical, magnetic, and heat properties of materials under extreme conditions such as low temperatures, strong magnetic fields, and high pressures.
Yuxuan Wang, PhD, University of Florida, USA
Yuxuan Wang is an associate professor at the Department of Physics, University of Florida. He works on the field of strongly correlated systems, including non-Fermi liquids, unconventional superconductivity, and topological phases of matter. He is also interested in general aspects of quantum field theory and its applications to condensed matter systems.
Hai-Hu Wen, PhD, Nanjing University, China
Hai-Hu Wen is a full Professor of Physics at Nanjing University. His academic interests cover the exploration of new superconductors and the study of correlated electronic materials, pairing mechanisms in unconventional superconductors, vortex physics and other topics. He was the Director of the National Laboratory for Superconductivity of China (2000-2009) and the principal investigator and coordinator of the National Project on Fundamental Research of Superconductivity of China from 2005-2015.
