Research paperExperimental CharacterizationSpin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe₂Saisab Bhowmik, Bhaskar Ghawri, Youngju Park, Dongkyu Lee et al.arXiv preprint·2022·10.1038/s41467-023-39855-x·arXiv:2211.01251AbstractWe investigate the non-integer filling regime of the moiré band in twisted bilayer graphene proximitized by tungsten diselenide. The work reports signatures of valley polarization along with Fermi-surface reconstructions suggesting a Stoner-like instability favored by van Hove singularities in the vicinity of ν < 2. Anomalous Hall effect, hysteresis, and abrupt magnetization reversal are observed and tuned by carrier density and magnetic field. Weak antilocalization measurements indicate proximity-induced spin-orbit coupling in the device.Read more
hBN-encapsulated twisted bilayer graphene on WSe₂ heterostructure on SiO₂/Si substrate used for transport measurements.1 characterization3 properties3 figuresExperimentalCStudied MaterialWSe₂Studied MaterialBNSubstrate / DielectricSiO₂Substrate / DielectricSiSubstrate / DielectricExpand
Research paperExperimental CharacterizationSpin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe₂Saisab Bhowmik, Bhaskar Ghawri, Youngju Park, Dongkyu Lee et al.arXiv preprint·2022·10.1038/s41467-023-39855-x·arXiv:2211.01251AbstractWe investigate the non-integer filling regime of the moiré band in twisted bilayer graphene proximitized by tungsten diselenide. The work reports signatures of valley polarization along with Fermi-surface reconstructions suggesting a Stoner-like instability favored by van Hove singularities in the vicinity of ν < 2. Anomalous Hall effect, hysteresis, and abrupt magnetization reversal are observed and tuned by carrier density and magnetic field. Weak antilocalization measurements indicate proximity-induced spin-orbit coupling in the device.Read more
hBN-encapsulated twisted bilayer graphene on WSe₂ heterostructure on SiO₂/Si substrate used for transport measurements.1 characterization3 properties3 figuresExperimentalCStudied MaterialWSe₂Studied MaterialBNSubstrate / DielectricSiO₂Substrate / DielectricSiSubstrate / DielectricExpand
Research paperExperimental CharacterizationSpin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe₂Saisab Bhowmik, Bhaskar Ghawri, Youngju Park, Dongkyu Lee et al.arXiv preprint·2022·10.1038/s41467-023-39855-x·arXiv:2211.01251AbstractWe investigate the non-integer filling regime of the moiré band in twisted bilayer graphene proximitized by tungsten diselenide. The work reports signatures of valley polarization along with Fermi-surface reconstructions suggesting a Stoner-like instability favored by van Hove singularities in the vicinity of ν < 2. Anomalous Hall effect, hysteresis, and abrupt magnetization reversal are observed and tuned by carrier density and magnetic field. Weak antilocalization measurements indicate proximity-induced spin-orbit coupling in the device.Read more
hBN-encapsulated twisted bilayer graphene on WSe₂ heterostructure on SiO₂/Si substrate used for transport measurements.1 characterization3 properties3 figuresExperimentalCStudied MaterialWSe₂Studied MaterialBNSubstrate / DielectricSiO₂Substrate / DielectricSiSubstrate / DielectricExpand
Research paperExperimental CharacterizationSpin-orbit coupling-enhanced valley ordering of malleable bands in twisted bilayer graphene on WSe₂Saisab Bhowmik, Bhaskar Ghawri, Youngju Park, Dongkyu Lee et al.arXiv preprint·2022·10.1038/s41467-023-39855-x·arXiv:2211.01251AbstractWe investigate the non-integer filling regime of the moiré band in twisted bilayer graphene proximitized by tungsten diselenide. The work reports signatures of valley polarization along with Fermi-surface reconstructions suggesting a Stoner-like instability favored by van Hove singularities in the vicinity of ν < 2. Anomalous Hall effect, hysteresis, and abrupt magnetization reversal are observed and tuned by carrier density and magnetic field. Weak antilocalization measurements indicate proximity-induced spin-orbit coupling in the device.Read more
hBN-encapsulated twisted bilayer graphene on WSe₂ heterostructure on SiO₂/Si substrate used for transport measurements.1 characterization3 properties3 figuresExperimentalCStudied MaterialWSe₂Studied MaterialBNSubstrate / DielectricSiO₂Substrate / DielectricSiSubstrate / DielectricExpand