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Electronic Quantum Materials Simulated with Artificial Model Lattices
Saoirsé E Freeney1, Marlou R Slot1, Thomas S Gardenier1
1Condensed Matter and Interfaces, Debye Institute of Nanomaterial Science, University of Utrecht, Princetonplein 5, 3584 CC Utrecht, The Netherlands.
ACS Nanoscience Au
|June 21, 2022
Summary
Engineered artificial lattices offer precise control over material properties, enabling the study of complex electronic behaviors. This review explores atom-by-atom construction and characterization for novel quantum simulations.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Simulation
Background:
- Understanding the electronic properties of natural crystals is challenging due to the complex interplay of constituent elements and structure.
- Independent variation of factors like geometry, spin-orbit coupling, and interactions is difficult in natural materials.
- Artificial lattices provide a controllable platform to overcome these limitations and explore novel electronic phenomena.
Purpose of the Study:
- To review the methodology of creating and characterizing artificial lattices atom-by-atom using scanning tunneling microscopy.
- To discuss the application of these artificial lattices in analogue quantum simulation of electronic band structures.
- To explore the potential for transferring insights from artificial lattices back to real material engineering.
Main Methods:
- Atomic manipulation using a scanning tunneling microscope (STM) to construct artificial lattices on atomically flat metal surfaces.
- Cryogenic STM for in-situ creation, microscopic characterization, and band structure analysis via tunneling spectroscopy.
- Analogue quantum simulation of various lattice types, including honeycomb, Lieb, kagome, and quasi-crystalline structures.
Main Results:
- Demonstration of precise control over artificial lattice geometry, dimensions, and electronic interactions.
- Successful creation and characterization of artificial atoms, molecules, and complex lattice structures.
- Observation of unique electronic properties, including those leading to crystalline topological insulators and electronic quasi-crystals.
Conclusions:
- Atom-by-atom engineering of artificial lattices provides unprecedented control for fundamental studies of electronic properties.
- Scanning tunneling microscopy is a powerful tool for the creation, characterization, and quantum simulation of designed materials.
- Knowledge gained from artificial lattices can inform strategies for engineering advanced real materials.
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