DOAJ Open Access 2023

Interaction-driven spontaneous ferromagnetic insulating states with odd Chern numbers

Peizhi Mai Edwin W. Huang Jiachen Yu Benjamin E. Feldman Philip W. Phillips

Abstrak

Abstract Motivated by recent experimental work on moiré systems in a strong magnetic field, we compute the compressibility as well as the spin correlations and Hofstadter spectrum of spinful electrons on a honeycomb lattice with Hubbard interactions using the determinantal quantum Monte Carlo method. While the interactions in general preserve quantum and anomalous Hall states, emergent features arise corresponding to an antiferromagnetic insulator at half-filling and other incompressible states following the Chern sequence ± (2N + 1). These odd integer Chern states exhibit strong ferromagnetic correlations and arise spontaneously without any external mechanism for breaking the spin-rotation symmetry. Analogs of these magnetic states should be observable in general interacting quantum Hall systems. In addition, the interacting Hofstadter spectrum is qualitatively similar to the experimental data at intermediate values of the on-site interaction.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (5)

Peizhi Mai

Edwin W. Huang

Jiachen Yu

Benjamin E. Feldman

Philip W. Phillips

Format Sitasi

APA MLA BibTeX

Mai, P., Huang, E.W., Yu, J., Feldman, B.E., Phillips, P.W. (2023). Interaction-driven spontaneous ferromagnetic insulating states with odd Chern numbers. https://doi.org/10.1038/s41535-023-00544-z

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Informasi Jurnal

Tahun Terbit: 2023
Sumber Database: DOAJ
DOI: 10.1038/s41535-023-00544-z
Akses: Open Access ✓