Emergent mystery in the Kondo insulator samarium hexaboride
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 …
correlations cause a band gap to open. SmB6 hosts both a bulk insulating state and a …
Landau quantization and highly mobile fermions in an insulator
In strongly correlated materials, quasiparticle excitations can carry fractional quantum
numbers. An intriguing possibility is the formation of fractionalized, charge-neutral fermions …
numbers. An intriguing possibility is the formation of fractionalized, charge-neutral fermions …
Colossal magnetoresistance in a nonsymmorphic antiferromagnetic insulator
Here we investigate antiferromagnetic Eu5In2Sb6, a nonsymmorphic Zintl phase. Our
electrical transport data show that Eu5In2Sb6 is remarkably insulating and exhibits an …
electrical transport data show that Eu5In2Sb6 is remarkably insulating and exhibits an …
Gapless fermionic excitation in the antiferromagnetic state of ytterbium zigzag chain
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 …
unresolved issues in recent condensed matter physics. This type of excitations has been …
Spin-liquid insulators can be Landau's Fermi liquids
M Fabrizio - Physical Review Letters, 2023 - APS
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 …
electron's quantum numbers except charge—inspired by the neutral spin-1/2 excitations, the …
Unusual high-field metal in a Kondo insulator
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 …
phases. One such phase occurs in the Kondo insulator YbB12, the insulating state of which …
Hall Anomaly, Quantum Oscillations and Possible Lifshitz Transitions in Kondo Insulator : Evidence for Unconventional Charge Transport
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 …
degrees of freedom may give rise to anomalous charge-transport properties, which can be …
[HTML][HTML] Time-resolved measurements in pulsed magnetic fields
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 …
is one of the ways of understanding physical principles of the system. In this Perspective, we …
Temperature-driven change in band structure reflecting spin-charge separation of Mott and Kondo insulators
M Kohno - Physical Review B, 2023 - APS
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 …
even without a phase transition. Here, to clarify the underlying mechanism, the spectral …
Resistivity saturation in Kondo insulators
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 …
T*. For some, metallic surface states, potentially from a non-trivial bulk topology, are a likely …