Intermetallic compounds containing f-electron elements display a wealth of superconducting
phases, which are prime candidates for unconventional pairing with complex order …

This article reviews the physics of multipolar interactions and multipolar order in f-electron
systems, using the actinide dioxides as a paradigm. In the past few years, these apparently …

Four types of atomic-scale multipoles (electric, magnetic, magnetic toroidal, and electric
toroidal multipoles) give a complete set to describe arbitrary degrees of freedom for coupled …

In Mott insulators with the t 2 g 4 electronic configuration such as of Re 3+, Ru 4+, Os 4+,
and Ir 5+ ions, spin-orbit coupling dictates a Van Vleck–type nonmagnetic ground state with …

In this paper we review experimental and theoretical results on higher electronic multipoles
in solids with strong correlations. Recent experiments and their theoretical interpretation …

A systematic description of multipole degrees of freedom is discussed on the basis of the
Stevens' operator-equivalent technique. The generalized Stevens' multiplicative factors are …

Cerium hexaboride is a cubic f-electron heavy-fermion compound that displays a rich array
of low-temperature magnetic ordering phenomena which have been the subject of …

In recent decades, novel magnetism of d-and f-electron compounds has been discussed
very intensively both in experimental and theoretical research fields of condensed matter …

Broken symmetries in solids involving higher order multipolar degrees of freedom are
historically referred to as “hidden orders” due to the formidable task of detecting them with …

Recent experiments on U Ru 2 Si 2 show that the low-pressure hidden order is nonmagnetic
but it breaks time reversal invariance. Restricting our attention to local order parameters of 5 …