Research paperExperimental CharacterizationAssessment of valley coherence in a high-quality monolayer molybdenum diselenideYuto Urano, Xue Mengsong, Kenji Watanabe, Takashi Taniguchi et al.2023·10.35848/1882-0786/acd985·arXiv:2305.07852AbstractWe investigate the valley coherence in high and low-quality monolayer MoSe₂ by polarization-resolved photoluminescence spectroscopy. The observed valley coherence is on the order of 10 % regardless of the sample quality, proving that the suppression of extrinsic effects does not improve the valley coherence. The valley decoherence time estimated based on the valley coherence time and exciton lifetime is sub-picosecond at the longest, which suggests that intrinsic scattering sources, such as phonons, strongly limit the valley coherence.Read more
High-quality region of a monolayer MoSe₂ flake prepared by graphene-capping-assisted nanosqueezing and encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations6 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
Low-quality region of the same monolayer MoSe₂ flake, prepared without squeezing, encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations5 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
Research paperExperimental CharacterizationAssessment of valley coherence in a high-quality monolayer molybdenum diselenideYuto Urano, Xue Mengsong, Kenji Watanabe, Takashi Taniguchi et al.2023·10.35848/1882-0786/acd985·arXiv:2305.07852AbstractWe investigate the valley coherence in high and low-quality monolayer MoSe₂ by polarization-resolved photoluminescence spectroscopy. The observed valley coherence is on the order of 10 % regardless of the sample quality, proving that the suppression of extrinsic effects does not improve the valley coherence. The valley decoherence time estimated based on the valley coherence time and exciton lifetime is sub-picosecond at the longest, which suggests that intrinsic scattering sources, such as phonons, strongly limit the valley coherence.Read more
High-quality region of a monolayer MoSe₂ flake prepared by graphene-capping-assisted nanosqueezing and encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations6 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
Low-quality region of the same monolayer MoSe₂ flake, prepared without squeezing, encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations5 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
Research paperExperimental CharacterizationAssessment of valley coherence in a high-quality monolayer molybdenum diselenideYuto Urano, Xue Mengsong, Kenji Watanabe, Takashi Taniguchi et al.2023·10.35848/1882-0786/acd985·arXiv:2305.07852AbstractWe investigate the valley coherence in high and low-quality monolayer MoSe₂ by polarization-resolved photoluminescence spectroscopy. The observed valley coherence is on the order of 10 % regardless of the sample quality, proving that the suppression of extrinsic effects does not improve the valley coherence. The valley decoherence time estimated based on the valley coherence time and exciton lifetime is sub-picosecond at the longest, which suggests that intrinsic scattering sources, such as phonons, strongly limit the valley coherence.Read more
High-quality region of a monolayer MoSe₂ flake prepared by graphene-capping-assisted nanosqueezing and encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations6 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
Low-quality region of the same monolayer MoSe₂ flake, prepared without squeezing, encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations5 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
Research paperExperimental CharacterizationAssessment of valley coherence in a high-quality monolayer molybdenum diselenideYuto Urano, Xue Mengsong, Kenji Watanabe, Takashi Taniguchi et al.2023·10.35848/1882-0786/acd985·arXiv:2305.07852AbstractWe investigate the valley coherence in high and low-quality monolayer MoSe₂ by polarization-resolved photoluminescence spectroscopy. The observed valley coherence is on the order of 10 % regardless of the sample quality, proving that the suppression of extrinsic effects does not improve the valley coherence. The valley decoherence time estimated based on the valley coherence time and exciton lifetime is sub-picosecond at the longest, which suggests that intrinsic scattering sources, such as phonons, strongly limit the valley coherence.Read more
High-quality region of a monolayer MoSe₂ flake prepared by graphene-capping-assisted nanosqueezing and encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations6 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
Low-quality region of the same monolayer MoSe₂ flake, prepared without squeezing, encapsulated as G/hBN/MoSe₂/hBN/G.1 preparation3 characterizations5 properties4 figuresExperimentalMoSe₂Studied MaterialhBNSubstrate / DielectricCCapping Or ContactExpand
