FPS 2025

The conference “Fundamental Problems of High Temperature Superconductivity-2025” (FPS’25), is the 6^th conference in row, organized by the P.N. Lebedev Physical Institute.

The years preceding FPS’25 were extremely impressive and fruitful for this field due to the discovery 10 years ago of hydrogen sulfide superconductivity with a record critical T_c value 203 K, with impressive achievements in the interfacial superconductivity, including LaAlO₃ / SrTiO₃ interface and FeSe monolayers on the SrTiO₃, and with the emergence of very interesting physics of the topologically non-trivial materials, including the topological superconductivity. In the fall of 2016, the HTS-community commemorated the 100^th birthday of Vitaly Ginzburg, a Nobel laureate, great scientist and a great enthusiast of the High temperature superconductivity. Subsequent conferences after FPS’15 have been postponed due to the pandemic and other unforeseen events that prevented the meeting of participants from different regions and countries.

The discovery of the high-temperature superconductivity in the whole class of binary and ternary polyhydrides (whose T_c reaches now 260 K) is important not only due to their record high T_c value. More importantly, it has breathed new life into the conventional electron-phonon pairing, already revitalizing with the discovery of MgB₂. This finding and subsequent experiments give reason for hoping that superconductivity can even occur at room temperature and at ambient pressure. Also, this discovery opens up routes and encourages researchers for designing new superconducting materials capable for practical applications.

Despite the almost 40-year history of HTSC in cuprates, their extremely complex physics continues to pose a challenge to researchers. Magnetism, which has traditionally been viewed as the antagonist of superconductivity, has recently introduced new physics in superconductors with magnetic ordering of atoms. Another new twist in research promises combinations of topological properties and superconductivity, either in a single material or in layered structures.

On the practical application side, new iron-based supersonductors and (Cu,C)-1234 HTSС materials obtain a good chance to become successors of REBCO, Nb₃Sn and NbTi wires, due to their superior performance and a simpler manufacturing technology.

The FPS Conference considers complexity and promise of the novel materials, and causes the scientific community to more freely share the ideas and results in the field of superconductivity. It became a tradition to publish selected FPS’15 papers collection in the Journal Superconductivity and Novel Magnetism (Springer). This FPS’25 conference is no exception to this tradition. We will be delighted to have received contributions from the leading researchers in the field.

The main topics of the FPS’25 conference are as follows:

• (M) Fundamentals of High-Tc (mechanisms, pairing symmetry, etc);
• (RTS) Hydride HTSC at Mb pressures and paths to room-Tc at ambient pressure;
• (P) Physical properties of supersconductors and quantum/topological materials;
• (SM) Superconductivity, magnetic and topological order;
• (A)Physical aspects of applied superconductivity.

We welcome all participants of FPS’25, wish them creative success and look forward to new discoveries!

Michael Sadovskii (Institute of Electrophysics, RAS, Ekaterinburg, Russia)
Vladimir Pudalov (P.N. Lebedev Physical Institute, RAS, Moscow, Russia)
Co-Chairs, Program Committee