Quantum Phases of Transition Metal Dichalcogenide Moiré Systems

Journal Article · 13 April 2022 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.128.157602 · OSTI ID:1864850

Zhou, Yiqing  ^[1]; Sheng, D.  N.  ^[2]; Kim, Eun-Ah ^[3]

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1. Cornell Univ., Ithaca, NY (United States); CSUN
2. California State University, Northridge (CSUN), CA (United States)
3. Cornell Univ., Ithaca, NY (United States)

Moiré systems provide a rich platform for studies of strong correlation physics. Recent experiments on heterobilayer transition metal dichalcogenide Moiré systems are exciting in that they manifest a relatively simple model system of an extended Hubbard model on a triangular lattice. Inspired by the prospect of the hetero-transition metal dichalcogenide Moiré system’s potential as a solid-state-based quantum simulator, we explore the extended Hubbard model on the triangular lattice using the density matrix renormalization group. Specifically, we explore the two-dimensional phase space spanned by the key tuning parameters in the extended Hubbard model, namely, the kinetic energy strength and the further-range Coulomb interaction strengths. We find competition between Fermi fluid, chiral spin liquid, spin density wave, and charge order. In particular, our finding of the optimal further-range interaction for the chiral correlation presents a tantalizing possibility.

• Research Organization: California State University, Northridge (CSUN), CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
• Grant/Contract Number: FG02-06ER46305
• OSTI ID: 1864850
• Alternate ID(s): OSTI ID: 2322541
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 15 Vol. 128; ISSN 0031-9007
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English