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Disordered Mott-Hubbard Physics in Nanoparticle Solids: Transitions Driven by Disorder, Interactions, and Their
Davis Unruh1, Alberto Camjayi2, Chase Hansen1
1Physics Department, University of California, Davis, Davis, California 95616, United States.
Adapting the Mott-Hubbard model to nanoparticle (NP) solids provides new insights. Our simulations reveal similar mobility scenarios, explaining measured NP solid mobilities and constructing a comprehensive phase diagram.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Nanoparticle (NP) solids exhibit complex electronic properties influenced by disorder and electron-electron interactions.
- Understanding charge transport in these materials is crucial for their application in electronic devices.
Purpose of the Study:
- To adapt the disordered Mott-Hubbard model for NP solids.
- To develop a hierarchical nanoparticle transport simulator (HINTS).
- To investigate the interplay between correlations and disorder using dynamical mean field theory (DMFT).
Main Methods:
- Developed the hierarchical nanoparticle transport simulator (HINTS).
- Applied dynamical mean field theory (DMFT) to the multiorbital Hubbard model.
- Studied disorder-localized and Mott-localized phases and transitions.
Main Results:
- HINTS and DMFT produced strikingly similar mobility scenarios.
- The simulation results account for experimentally measured mobilities in NP solids.
- A comprehensive phase diagram for PbSe NP solids was constructed.
Conclusions:
- Adapting the Mott-Hubbard model offers valuable insights into NP solid behavior.
- The developed simulation methods accurately describe charge transport mechanisms.
- The phase diagram provides a roadmap for understanding and tuning NP solid properties.
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