Research paperExperimental CharacterizationMoiré-Engineered Excitonic Landscape and Phonon-Mediated Recombination in Twisted WSe₂ BilayersMemansa Thapa, Aksa Thomas, Jayalekshmi U. J., Krishna Prasad Bera et al.2026·10.1063/5.0024651·arXiv:2606.02131AbstractTwist-angle engineering in two-dimensional van der Waals heterostructures tunes optoelectronic properties and many-body interactions. The paper reports low-temperature photoluminescence from a twisted bilayer WSe₂/WSe₂ moiré superlattice encapsulated in hBN, comparing monolayer, natural bilayer, ~60° artificial bilayer, and ~2° twisted bilayer samples. Temperature-dependent Raman and PL measurements show twist-induced phonon renormalization, interlayer exciton emission, phonon-assisted recombination, and suppression of defect-bound excitons.Read more
Monolayer WSe₂ encapsulated in hBN and measured at 3 K; mechanically exfoliated and assembled by dry transfer.1 preparation2 characterizations6 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Natural bilayer WSe₂ encapsulated in hBN and measured at 3 K.1 preparation2 characterizations7 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Artificial bilayer WSe₂ fabricated by stacking two monolayers with twist angle ~60° and encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Twisted WSe₂ bilayer with twist angle ~2° encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Research paperExperimental CharacterizationMoiré-Engineered Excitonic Landscape and Phonon-Mediated Recombination in Twisted WSe₂ BilayersMemansa Thapa, Aksa Thomas, Jayalekshmi U. J., Krishna Prasad Bera et al.2026·10.1063/5.0024651·arXiv:2606.02131AbstractTwist-angle engineering in two-dimensional van der Waals heterostructures tunes optoelectronic properties and many-body interactions. The paper reports low-temperature photoluminescence from a twisted bilayer WSe₂/WSe₂ moiré superlattice encapsulated in hBN, comparing monolayer, natural bilayer, ~60° artificial bilayer, and ~2° twisted bilayer samples. Temperature-dependent Raman and PL measurements show twist-induced phonon renormalization, interlayer exciton emission, phonon-assisted recombination, and suppression of defect-bound excitons.Read more
Monolayer WSe₂ encapsulated in hBN and measured at 3 K; mechanically exfoliated and assembled by dry transfer.1 preparation2 characterizations6 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Natural bilayer WSe₂ encapsulated in hBN and measured at 3 K.1 preparation2 characterizations7 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Artificial bilayer WSe₂ fabricated by stacking two monolayers with twist angle ~60° and encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Twisted WSe₂ bilayer with twist angle ~2° encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Research paperExperimental CharacterizationMoiré-Engineered Excitonic Landscape and Phonon-Mediated Recombination in Twisted WSe₂ BilayersMemansa Thapa, Aksa Thomas, Jayalekshmi U. J., Krishna Prasad Bera et al.2026·10.1063/5.0024651·arXiv:2606.02131AbstractTwist-angle engineering in two-dimensional van der Waals heterostructures tunes optoelectronic properties and many-body interactions. The paper reports low-temperature photoluminescence from a twisted bilayer WSe₂/WSe₂ moiré superlattice encapsulated in hBN, comparing monolayer, natural bilayer, ~60° artificial bilayer, and ~2° twisted bilayer samples. Temperature-dependent Raman and PL measurements show twist-induced phonon renormalization, interlayer exciton emission, phonon-assisted recombination, and suppression of defect-bound excitons.Read more
Monolayer WSe₂ encapsulated in hBN and measured at 3 K; mechanically exfoliated and assembled by dry transfer.1 preparation2 characterizations6 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Natural bilayer WSe₂ encapsulated in hBN and measured at 3 K.1 preparation2 characterizations7 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Artificial bilayer WSe₂ fabricated by stacking two monolayers with twist angle ~60° and encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Twisted WSe₂ bilayer with twist angle ~2° encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Research paperExperimental CharacterizationMoiré-Engineered Excitonic Landscape and Phonon-Mediated Recombination in Twisted WSe₂ BilayersMemansa Thapa, Aksa Thomas, Jayalekshmi U. J., Krishna Prasad Bera et al.2026·10.1063/5.0024651·arXiv:2606.02131AbstractTwist-angle engineering in two-dimensional van der Waals heterostructures tunes optoelectronic properties and many-body interactions. The paper reports low-temperature photoluminescence from a twisted bilayer WSe₂/WSe₂ moiré superlattice encapsulated in hBN, comparing monolayer, natural bilayer, ~60° artificial bilayer, and ~2° twisted bilayer samples. Temperature-dependent Raman and PL measurements show twist-induced phonon renormalization, interlayer exciton emission, phonon-assisted recombination, and suppression of defect-bound excitons.Read more
Monolayer WSe₂ encapsulated in hBN and measured at 3 K; mechanically exfoliated and assembled by dry transfer.1 preparation2 characterizations6 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Natural bilayer WSe₂ encapsulated in hBN and measured at 3 K.1 preparation2 characterizations7 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Artificial bilayer WSe₂ fabricated by stacking two monolayers with twist angle ~60° and encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand
Twisted WSe₂ bilayer with twist angle ~2° encapsulated in hBN; measured at 3 K.1 preparation2 characterizations9 properties2 figuresExperimentalWSe₂Studied MaterialhBNSubstrate / DielectricExpand