Local Spectroscopies Reveal Percolative Metal in Disordered Mott Insulators

Joseph C. Szabo, Kyungmin Lee, Vidya Madhavan, Nandini Trivedi

Research output: Contribution to journalArticle

Abstract

We elucidate the mechanism by which a Mott insulator transforms into a non-Fermi liquid metal upon increasing disorder at half filling. By correlating maps of the local density of states, the local magnetization, and the local bond conductivity, we find a collapse of the Mott gap toward a V-shaped pseudogapped density of states that occurs concomitantly with the decrease of magnetism around the highly disordered sites but an increase of bond conductivity. These metallic regions percolate to form an emergent non-Fermi liquid phase with a conductivity that increases with temperature. Bond conductivity measured via local microwave impedance combined with charge and spin local spectroscopies are ideal tools to corroborate our predictions.

Original languageEnglish (US)
Article number137402
JournalPhysical review letters
Volume124
Issue number13
DOIs
StatePublished - Apr 3 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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