Persistent Coulomb Blockade Across the Metal-Insulator Transition in Nanoparticle Solids

ALBERTO CAMJAYI; MARCELO ROZENBERG; CHASE HANSEN; GERGELY T. ZIMANYI; DAVIS UNRUH; JOEL BOBADILLA

NANO LETTERS (PRINT)

AMER CHEMICAL SOC

Lugar: Washington; Año: 2020

1530-6984

We show that Nanoparticle solids are an exciting platform to seek new insights into the disordered Mott-Hubbard physics. We developed a Hierarchical Nanoparticle Transport Simulator (HINTS) and showed it is a new powerful method to describe the various transitions from the Disorder-localized phase, to complement studies from the delocalized phase. At n=1 filling, HINTS found that at large interactions the Mott-to-Anderson transition occurs directly, with a persistent gap. Away from n=1 filling, HINTS located the Metal-Insulator Transition. Finally, we developed DMFT for disordered multi-orbital systems and extended it to fillings away from commensuration, to determine the mobility and the Mott gap and its dependence on the disorder.this low mobility include that (1) the nanoparticle solids are insulators; and (2) the Coulomb blockade. The insulating behavior can be overcome by driving the  system across a Metal-Insulator Transition (MIT). However, the evolution of the Coulomb blockade across the MIT has not been analyzed. This  paper focuses on the behavior of the Coulomb blockade by analyzing  carrier transport in the insulating phase by our Hierarchical  Nanoparticle Transport Simulator, and by Dynamical Mean-Field Theory  in the metallic phase. Our unexpected result is that the Coulomb  blockade persists across the MIT.