Physics

Evidence for ground state coherence in a two-dimensional Kondo lattice

W. Wan, R. Harsh, et al.

Explore the groundbreaking discovery of a coherent ground state in a 1T/1H-TaSe₂ heterobilayer, revealing fascinating magnetic order mediated by conduction electrons. This research, conducted by Wen Wan, Rishav Harsh, Antonella Meninno, Paul Dreher, Sandra Sajan, Haojie Guo, Ion Errea, Fernando de Juan, and Miguel M. Ugeda, promises to unlock new paths in magnetic quantum criticality and unconventional superconductivity.

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Abstract

This paper presents evidence of a coherent ground state in a 1T/1H-TaSe₂ heterobilayer, a two-dimensional Kondo lattice, using scanning tunneling microscopy/spectroscopy at 340 mK. The observation of two symmetric electronic resonances around the Fermi energy, along with their behavior under magnetic fields, suggests a ground state with magnetic order mediated by conduction electrons, inconsistent with a fully screened Kondo lattice. This finding opens avenues for exploring magnetic quantum criticality, Kondo breakdown transitions, and unconventional superconductivity in the two-dimensional limit.

Publisher

Nature Communications

Published On

Nov 02, 2023

Authors

Wen Wan, Rishav Harsh, Antonella Meninno, Paul Dreher, Sandra Sajan, Haojie Guo, Ion Errea, Fernando de Juan, Miguel M. Ugeda

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