Superconductivity develops in metals upon the formation of a coherent macroscopic
quantum state of electron pairs. Iron pnictides and chalcogenides are materials that have …

The record superconducting transition temperature (T c) for the iron-based high-temperature
superconductors (Fe-HTS) has long been 56 K. Recently, in single-layer FeSe films grown …

We prepared one-unit-cell (1-UC) thick FeSe films on insulating SrTiO 3 substrates with non-
superconducting FeTe protection layers by molecular beam epitaxy for ex situ studies. By …

The interface between transition metal compounds provides a rich playground for emergent
phenomena. Recently, significantly enhanced superconductivity has been reported for …

Electron correlations play a central role in iron-based superconductors. In these systems,
multiple Fe 3 d-orbitals are active in the low-energy physics, and they are not all degenerate …

Superconductivity originates from pairing of electrons near the Fermi energy. The Fermi
surface topology and pairing symmetry are thus two pivotal characteristics of a …

Interface enhanced superconductivity at two dimensional limit has become one of most
intriguing research directions in condensed matter physics. Here, we report the …

A distinct electronic structure was observed in the single-layer FeSe which shows
surprisingly high-temperature superconductivity over 65 K. Here, we demonstrate that the …

By growing monolayer FeSe on SrTiO3 (001) surface, researchers obtain the highest
superconducting transition-temperature for iron-based superconductor. Here, we study the …

Parity is a fundamental quantum number used to classify a state of matter. Materials rarely
possess ground states with odd parity. We show that the superconducting state in iron …