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arXiv · 2111.09440

Local Sensing of Correlated Electrons in Dual-moiré Heterostructures using Dipolar Excitons

Weijie Li·Luka M. Devenica·Jin Zhang·Yang Zhang·Xin Lu·Kenji Watanabe·Takashi Taniguchi·Angel Rubio·Ajit Srivastava
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Abstract

Moiré heterostructures are rapidly emerging as a tunable platform to study correlated electronic phenomena. Discovery of exotic quantum phases in moiré systems requires novel probes of charge and spin order. Unlike detection schemes which average over several moiré cells, local sensors can provide richer information with greater sensitivity. We study a WSe$_2$/MoSe$_2$/WSe$_2$ heterotrilayer which hosts excitons and electrons in distinct moiré lattices, and show that localized dipolar excitons are sensitive proximity charge sensors, uncovering numerous correlated electronic states at fractional fillings of the multi-orbital moiré lattice. In addition, the emission polarization can reveal the local electronic spin configuration at different fillings. Our results establish dipolar excitons as promising candidates to study emergent quantum matter and quantum magnetism in moiré crystals with higher spatial resolution.

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Weijie Li, Luka M. Devenica, Jin Zhang, Yang Zhang, Xin Lu, Kenji Watanabe, Takashi Taniguchi, Angel Rubio, Ajit Srivastava. 2021-11-17. Local Sensing of Correlated Electrons in Dual-moiré Heterostructures using Dipolar Excitons. https://arxiv.org/abs/2111.09440

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