Superconductivity is a phenomenon where the macroscopic quantum coherence appears
due to the pairing of electrons. This offers a fascinating arena to study the physics of …

Point-contact spectroscopy was originally developed for the determination of the electron–
phonon spectral function in normal metals. However, in the past 20 years it has become an …

Recent studies on high-T c superconductors have aroused new interest in tunnelling effects
in unconventional superconductors. Unlike in conventional s-wave superconductors, the d …

One of the outstanding questions in the study of twisted bilayer graphene—from both
experimental and theoretical points of view—is the nature of its superconducting phase. In …

This is a revised version of the first edition published in 1991. At the same time, this is a
revised version of the Syokabo edition, which was written in Japanese and published in …

The singlets s− and d−, and triplet p-wave pairing symmetries in quasi-one-dimensional
organic superconductors can be experimentally discriminated by probing the Andreev …

We report directional tunneling and point-contact spectroscopy measurements on the
{100},{110}, and {001} faces of YBa 2 Cu 3 O 7− δ single crystals at 4.2 K. The conductance …

We theoretically study the tunneling conductance of a junction consisting of a two-
dimensional unconventional p-wave magnet (UPM) and a superconductor (SC) for various …

The formation of bound states at surfaces of materials with an energy gap in the bulk
electron spectrum is a well known physical phenomenon. At superconductor surfaces …

A general formula for the Josephson current in a d-wave/insulator/d-wave-superconductor
junction is presented by taking account of the zero-energy states formed around the …