'Conventional'superconductivity, as used in this review, refers to electron–phonon-coupled
superconducting electron pairs described by BCS theory. Unconventional superconductivity …

Although the vast majority of high-T c cuprate superconductors are hole-doped, a small
family of electron-doped compounds exists. Underinvestigated until recently, there has been …

Tunneling spectroscopy has played a central role in the experimental verification of the
microscopic theory of superconductivity in classical superconductors. Initial attempts to apply …

Electrical transport through a normal-metal/superconductor contact at biases smaller than
the energy gap can occur via the reflection of an electron as a hole of opposite wave vector …

In this article we review essential natures of superconductivity in strongly correlated electron
systems (SCES) from a universal point of view. First we summarize experimental results on …

This review is an up-to-date snapshot of the current situation in studies of materials with
competing electron spectrum instabilities, namely Cooper pairing, on the one hand, and …

The behaviour of electrons in solids is well described by Landau's Fermi-liquid theory, which
predicts that although electrons in a metal interact, they can still be treated as well defined …

Inverse freezing and inverse melting are processes where a more symmetric phase is found
at lower temperatures than at higher temperatures. Such inverse transitions are very rare …

The ground state of superconductors is characterized by the long-range order of condensed
Cooper pairs: this is the only order present in conventional superconductors. The high …

This book presents a theory for unconventional superconductivity driven by spin excitations.
Using the Hubbard Hamiltonian and a self-consistent treatment of the spin excitations, the …