Special Issue on the Fundamental Problems of High-Temperature Superconductivity

Abstract

The conference “Fundamental Problems of High Temperature Superconductivity-2015,” FPS’15, is the fifth conference in a row, organized by the P.N. Lebedev Physical Institute in the suburbs of Moscow (http://fps15.lebedev. ru/en/). The previous conference, FPS’11, was held in the year celebrating the 100th anniversary of the discovery of superconductivity. Its scientific content was mainly devoted to the “iron-based superconductors,” a new class of hightemperature superconductors discovered in 2008 whose physical research reached maturity by 2011. The years preceding FPS’15 have been also exciting for superconductivity due to the advent of hydrogen sulfide (2014–2015) with the record critical Tc value 203 K [1], with impressive achievements in interfacial superconductivity, including LaAlO3/SrTiO3 interface [2] and FeSe monolayers on the SrTiO3 [3, 4], and with the emergence of very interesting physics of topologically non-trivial materials, including topological superconductivity [5–7]. The discovery of high-temperature superconductivity in hydrogen sulfide is important not only due to its record Tc value; more importantly, it has injected a new vitality into the wineskins of the conventional electron-phonon pairing, already revitalizing with the discovery of MgB2. There