Wigner molecular crystals from multielectron moiré artificial atoms-Reference-Cited by-同舟云学术

Wigner molecular crystals from multielectron moiré artificial atoms

Published:2024-07-05 Issue:6704 Volume:385 Page:86-91
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Li Hongyuan¹²³^ORCID,Xiang Ziyu¹²³^ORCID,Reddy Aidan P.⁴^ORCID,Devakul Trithep⁴^ORCID,Sailus Renee⁵^ORCID,Banerjee Rounak⁵^ORCID,Taniguchi Takashi⁶^ORCID,Watanabe Kenji⁷^ORCID,Tongay Sefaattin⁵^ORCID,Zettl Alex¹³⁸^ORCID,Fu Liang⁴^ORCID,Crommie Michael F.¹³⁸^ORCID,Wang Feng¹³⁸^ORCID

Affiliation:

1. Department of Physics, University of California at Berkeley, Berkeley, CA, USA.

2. Graduate Group in Applied Science and Technology, University of California at Berkeley, Berkeley, CA, USA.

3. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.

4. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA

5. School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA.

6. Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan.

7. Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Japan.

8. Kavli Energy NanoSciences Institute at the University of California Berkeley and the Lawrence Berkeley National Laboratory, Berkeley, CA, USA.

Abstract

Semiconductor moiré superlattices provide a versatile platform to engineer quantum solids composed of artificial atoms on moiré sites. Previous studies have mostly focused on the simplest correlated quantum solid—the Fermi-Hubbard model—in which intra-atom interactions are simplified to a single onsite repulsion energy U . Here we report the experimental observation of Wigner molecular crystals emerging from multielectron artificial atoms in twisted bilayer tungsten disulfide moiré superlattices. Using scanning tunneling microscopy, we demonstrate that Wigner molecules appear in multielectron artificial atoms when Coulomb interactions dominate. The array of Wigner molecules observed in a moiré superlattice comprises a crystalline phase of electrons: the Wigner molecular crystal, which is shown to be highly tunable through mechanical strain, moiré period, and carrier charge type.

Publisher

American Association for the Advancement of Science (AAAS)

Link

https://www.science.org/doi/pdf/10.1126/science.adk1348

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