Originally a pure mathematical concept, topology has been vigorously developed in various
physical systems in recent years, and underlies many interesting phenomena such as the …

In the class of materials called spin liquids,–, a magnetically ordered state cannot be
attained even at millikelvin temperatures because of conflicting constraints on each spin; for …

This review article presents a radical overview of the rich chemistry and physics of Zintl
phases as it relates to their interesting structure–property relationships. In particular, it …

Motivated by recent experiments on Kondo insulators, we theoretically study quantum
oscillations from disorder-induced in-gap states in small-gap insulators. By solving a non …

In strongly correlated materials, quasiparticle excitations can carry fractional quantum
numbers. An intriguing possibility is the formation of fractionalized, charge-neutral fermions …

In the pursuit of developing routes to enhance magnetic Kitaev interactions in α-RuCl 3, as
well as probing doping effects, we investigate the electronic properties of α-RuCl 3 in …

The search for a Fermi surface in the absence of a conventional Fermi liquid has thus far
yielded very few potential candidates. Among promising materials are spin-frustrated Mott …

In metals, orbital motions of conduction electrons on the Fermi surface are quantized in
magnetic fields, which is manifested by quantum oscillations in electrical resistivity. This …

Samarium hexaboride is a classic three-dimensional mixed valence system with a high-
temperature metallic phase that evolves into a paramagnetic charge insulator below 40 K. A …

Kondo insulating materials lie outside the usual dichotomy of weakly versus correlated—
band versus Mott—insulators. They are metallic at high temperatures but resemble band …