In this Colloquium, the main features of the electron-lattice interaction are discussed and
high values of the critical temperature up to room temperature could be provided. While the …

The discovery of high-temperature superconductivity in copper oxides was not accidental,
but was based on the knowledge that the divalent copper ion, Cu2+, is one of the strongest …

Twenty years of research have yet to produce a consensus on the origin of high-temperature
superconductivity (HTS). However, several generic characteristics of the copper oxide …

Abstract The Fe isotope effect (Fe-IE) on the transition temperature T c and the crystal
structure was studied in the Fe chalcogenide superconductor FeSe 1− x by means of …

Copper oxides are the only materials that have transition temperatures, T c, well above the
boiling point of liquid nitrogen, with a maximum T cm T_c^m of 162 K under pressure. Their …

The oxygen isotope (O 16/O 18) effect (OIE) on the pseudogap (charge-stripe ordering)
temperature T* is investigated for the cuprate superconductor La 2− x Sr x CuO 4 as a …

The local lattice structure in LaFeAsO 1− x F x superconductors is studied by extended x-ray
absorption fine-structure measurements. An anomalous upturn of the mean-square relative …

In 2014, a review of 56 panels was published by the present author, with the aim to describe,
using the concept of polarons, the properties of the superconductivity in the hole-doped …

High‐temperature superconductivity (HTS) emerges in quite different electronic materials:
cuprates, diborides, and iron‐pnictide superconductors. Looking for unity in the diversity we …

The Cu-3 d states in the high-T c cuprates are often described as a single band of 3 dx 2− y
2 states, with the other four 3 d states having about 2 to 3 eV higher energy due to the lower …