Tag

Quantum Criticality

All articles tagged with #quantum criticality

science2 years ago•20 min saved

"Novel 2D Van der Waals Metal Traps Heavy Electrons"

Researchers have discovered a two-dimensional heavy fermion system in the van der Waals metal CeSiI, which exhibits intriguing quantum criticality and superconductivity. This finding opens up new possibilities for studying the behavior of heavy fermions in two dimensions and exploring the potential applications of van der Waals materials in superconducting technologies. The data supporting the study are available in the paper and its Extended Data, with additional data accessible from the corresponding authors upon request.

via Nature.com|

#heavy-fermions #quantum-criticality #science

physics2 years ago•14 min saved

Controlling Heavy Fermions with Moiré Kondo Lattice Gates.

Researchers have realized a synthetic Kondo lattice in AB-stacked MoTe2/WSe2 moiré bilayers, in which the MoTe2 layer is tuned to a Mott insulating state, supporting a triangular moiré lattice of local moments, and the WSe2 layer is doped with itinerant conduction carriers. They observed heavy fermions with a large Fermi surface below the Kondo temperature and demonstrated widely and continuously gate-tunable Kondo temperatures through either the itinerant carrier density or the Kondo interaction. This study opens the possibility of in situ access to the phase diagram of the Kondo lattice with exotic quantum criticalities in a single device based on semiconductor moiré materials.

via Nature.com|

#gate-tunable #heavy-fermions #kondo-lattice