Samarium hexaboride (SmB6) is an example of a Kondo insulator, in which strong electron
correlations cause a band gap to open. SmB6 hosts both a bulk insulating state and a …

The presence of inclusions, twinning, and low-angle grain boundaries, demanded to exist by
the third law of thermodynamics, drive the behavior of quantum materials. Identification and …

Strong electronic interactions in condensed-matter systems often lead to unusual quantum
phases. One such phase occurs in the Kondo insulator YbB12, the insulating state of which …

In correlated electronic systems, strong interactions and the interplay between different
degrees of freedom may give rise to anomalous charge-transport properties, which can be …

A Kondo lattice is often electrically insulating at low temperatures. However, several recent
experiments have detected signatures of bulk metallicity within this Kondo insulating phase …

In strongly correlated quantum materials, electrons behave in ways that often extend beyond
the confines of conventional Fermi-liquid theory. Interesting results include the observation …

In traditional semiconductors with large effective Bohr radius, an electron donor creates a
hydrogen-like bound state just below the conduction band edge. The properties of the …

Homogeneous mixed-valence (MV) behaviour is one of the most intriguing phenomena of f-
electron systems. Despite extensive efforts, a fundamental aspect which remains unsettled is …

The mixed-valence compound YbB12 displays paradoxical quantum oscillations in electrical
resistivity and magnetic torque in a regime with a well-developed insulating charge gap and …

Kondo insulators are expected to transform into metals under a sufficiently strong magnetic
field. The closure of the insulating gap stems from the coupling of a magnetic field to the …