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 …

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

Here we investigate antiferromagnetic Eu5In2Sb6, a nonsymmorphic Zintl phase. Our
electrical transport data show that Eu5In2Sb6 is remarkably insulating and exhibits an …

The emergence of charge-neutral fermionic excitations in magnetic systems is one of the
unresolved issues in recent condensed matter physics. This type of excitations has been …

The long search for insulating materials that possess low-energy quasiparticles carrying
electron's quantum numbers except charge—inspired by the neutral spin-1/2 excitations, the …

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 …

Tracking the time-dependence of a state and its observable, ie, time-resolved measurement,
is one of the ways of understanding physical principles of the system. In this Perspective, we …

The electronic band structure can change with temperature in Mott and Kondo insulators,
even without a phase transition. Here, to clarify the underlying mechanism, the spectral …

Resistivities of heavy-fermion insulators typically saturate below a characteristic temperature
T*. For some, metallic surface states, potentially from a non-trivial bulk topology, are a likely …