Excitons in Bilayer MoS2 Displaying a Colossal Electric Field Splitting and Tunable Magnetic Response

Lorchat, Etienne; Selig, Malte; Katsch, Florian; Yumigeta, Kentaro; Tongay, Sefaattin; Knorr, Andreas; Schneider, Christian; Höfling, Sven

doi:10.1103/physrevlett.126.037401

Excitons in Bilayer MoS 2 Displaying a Colossal Electric Field Splitting and Tunable Magnetic Response

Journal Article · Wed Jan 20 00:00:00 EST 2021 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.126.037401· OSTI ID:1853665

Lorchat, Etienne ^[1]; Selig, Malte ^[2]; Katsch, Florian ^[2]; Yumigeta, Kentaro ^[3]; Tongay, Sefaattin ^[3]; Knorr, Andreas ^[2]; Schneider, Christian ^[4]; Höfling, Sven ^[5]

Univ. Würzburg (Germany). Wilhelm Conrad Röntgen Research Center for Complex Material Systems; OSTI
Technische Univ. Berlin (Germany). Inst. für Theoretische Physik Nichtlineare Optik und Quantenelektronik
Arizona State Univ., Tempe, AZ (United States)
Univ. Würzburg (Germany). Wilhelm Conrad Röntgen Research Center for Complex Material Systems; Univ. of Oldenburg (Germany). Inst. of Physics
Univ. Würzburg (Germany). Wilhelm Conrad Röntgen Research Center for Complex Material Systems

van der Waals heterostructures composed of transition metal dichalcogenide monolayers (TMDCs) are characterized by their truly rich excitonic properties which are determined by their structural, geometric, and electronic properties: In contrast to pure monolayers, electrons and holes can be hosted in different materials, resulting in highly tunable dipolar many-particle complexes. However, for genuine spatially indirect excitons, the dipolar nature is usually accompanied by a notable quenching of the exciton oscillator strength. Via electric and magnetic field dependent measurements, we demonstrate that a slightly biased pristine bilayer MoS₂ hosts strongly dipolar excitons, which preserve a strong oscillator strength. We scrutinize their giant dipole moment, and shed further light on their orbital and valley physics via bias-dependent magnetic field measurements.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: German Research Foundation (DFG); National Science Foundation (NSF); USDOE Office of Science (SC)

Grant/Contract Number:: SC0020653

OSTI ID:: 1853665

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 126; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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