Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice

Lian, Zhen; Chen, Dongxue; Meng, Yuze; Chen, Xiaotong; Su, Ying; Banerjee, Rounak; Taniguchi, Takashi; Watanabe, Kenji; Tongay, Sefaattin; Zhang, Chuanwei; Cui, Yong-Tao; Shi, Su-Fei

doi:10.1038/s41467-023-40783-z

Exciton Superposition across Moiré States in a Semiconducting Moiré Superlattice

Journal Article · Sat Aug 19 00:00:00 EDT 2023 · Nature Communications

DOI:https://doi.org/10.1038/s41467-023-40783-z· OSTI ID:2421626

Lian, Zhen ^[1]; ^[2]; Meng, Yuze ^[2]; Chen, Xiaotong ^[2]; Su, Ying ^[3]; Banerjee, Rounak ^[4]; ^[5]; ^[5]; ^[4]; ^[3]; ^[6]; ^[2]

Rensselaer Polytechnic Inst., Troy, NY (United States); Rensselaer Polytechnic Institute, Troy, NY (United States)
Rensselaer Polytechnic Inst., Troy, NY (United States)
Univ. of Texas at Dallas, TX (United States)
Arizona State Univ., Tempe, AZ (United States)
National Institute for Materials Science (NIMS), Tsukuba (Japan)
Univ. of California, Riverside, CA (United States)

Moiré superlattices of semiconducting transition metal dichalcogenides enable unprecedented spatial control of electron wavefunctions, leading to emerging quantum states. The breaking of translational symmetry further introduces a new degree of freedom: high symmetry moiré sites of energy minima behaving as spatially separated quantum dots. We demonstrate the superposition between two moiré sites by constructing a trilayer WSe₂/monolayer WS₂ moiré heterojunction. The two moiré sites in the first layer WSe₂ interfacing WS₂ allow the formation of two different interlayer excitons, with the hole residing in either moiré site of the first layer WSe₂ and the electron in the third layer WSe₂. An electric field can drive the hybridization of either of the interlayer excitons with the intralayer excitons in the third WSe₂ layer, realizing the continuous tuning of interlayer exciton hopping between two moiré sites and a superposition of the two interlayer excitons, distinctively different from the natural trilayer WSe₂.

View Accepted Manuscript (DOE)

Research Organization:: Arizona State Univ., Tempe, AZ (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0020653

OSTI ID:: 2421626

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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