Research paperExperimental CharacterizationLayer-dependent electromechanical response in twisted graphene moiré superlatticesHanhao Zhang, Yuanhao Wei, Yuhao Li, Shengsheng Lin et al.2025·10.1021/acsnano.4c01794·arXiv:2406.11442AbstractWe investigate the electromechanical responses of marginally twisted graphene moiré superlattices with different layer thicknesses using lateral piezoresponse force microscopy (LPFM). Distinct LPFM amplitudes and spatial profiles are observed in twisted bilayer graphene (tBLG) and twisted monolayer-bilayer graphene (tMBG), with effective in-plane piezoelectric coefficients of 0.05 pm/V and 0.35 pm/V, respectively. Force-tuning experiments reveal different responses between tBLG and tMBG, suggesting different electromechanical couplings: flexoelectric response near domain walls in tBLG and piezoelectric response in tMBG. Related multilayer twisted graphene systems (tMTG and tDBG) show behaviors similar to tMBG.Read more
Twisted bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.2 characterizations2 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.3 characterizations3 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-trilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted double bilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Research paperExperimental CharacterizationLayer-dependent electromechanical response in twisted graphene moiré superlatticesHanhao Zhang, Yuanhao Wei, Yuhao Li, Shengsheng Lin et al.2025·10.1021/acsnano.4c01794·arXiv:2406.11442AbstractWe investigate the electromechanical responses of marginally twisted graphene moiré superlattices with different layer thicknesses using lateral piezoresponse force microscopy (LPFM). Distinct LPFM amplitudes and spatial profiles are observed in twisted bilayer graphene (tBLG) and twisted monolayer-bilayer graphene (tMBG), with effective in-plane piezoelectric coefficients of 0.05 pm/V and 0.35 pm/V, respectively. Force-tuning experiments reveal different responses between tBLG and tMBG, suggesting different electromechanical couplings: flexoelectric response near domain walls in tBLG and piezoelectric response in tMBG. Related multilayer twisted graphene systems (tMTG and tDBG) show behaviors similar to tMBG.Read more
Twisted bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.2 characterizations2 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.3 characterizations3 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-trilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted double bilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Research paperExperimental CharacterizationLayer-dependent electromechanical response in twisted graphene moiré superlatticesHanhao Zhang, Yuanhao Wei, Yuhao Li, Shengsheng Lin et al.2025·10.1021/acsnano.4c01794·arXiv:2406.11442AbstractWe investigate the electromechanical responses of marginally twisted graphene moiré superlattices with different layer thicknesses using lateral piezoresponse force microscopy (LPFM). Distinct LPFM amplitudes and spatial profiles are observed in twisted bilayer graphene (tBLG) and twisted monolayer-bilayer graphene (tMBG), with effective in-plane piezoelectric coefficients of 0.05 pm/V and 0.35 pm/V, respectively. Force-tuning experiments reveal different responses between tBLG and tMBG, suggesting different electromechanical couplings: flexoelectric response near domain walls in tBLG and piezoelectric response in tMBG. Related multilayer twisted graphene systems (tMTG and tDBG) show behaviors similar to tMBG.Read more
Twisted bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.2 characterizations2 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.3 characterizations3 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-trilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted double bilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Research paperExperimental CharacterizationLayer-dependent electromechanical response in twisted graphene moiré superlatticesHanhao Zhang, Yuanhao Wei, Yuhao Li, Shengsheng Lin et al.2025·10.1021/acsnano.4c01794·arXiv:2406.11442AbstractWe investigate the electromechanical responses of marginally twisted graphene moiré superlattices with different layer thicknesses using lateral piezoresponse force microscopy (LPFM). Distinct LPFM amplitudes and spatial profiles are observed in twisted bilayer graphene (tBLG) and twisted monolayer-bilayer graphene (tMBG), with effective in-plane piezoelectric coefficients of 0.05 pm/V and 0.35 pm/V, respectively. Force-tuning experiments reveal different responses between tBLG and tMBG, suggesting different electromechanical couplings: flexoelectric response near domain walls in tBLG and piezoelectric response in tMBG. Related multilayer twisted graphene systems (tMTG and tDBG) show behaviors similar to tMBG.Read more
Twisted bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.2 characterizations2 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-bilayer graphene moiré superlattice on h-BN substrate, used for LPFM and force-tuning measurements.3 characterizations3 properties19 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted monolayer-trilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
Twisted double bilayer graphene moiré superlattice on h-BN substrate, studied for comparison of electromechanical response.1 characterization15 figuresExperimentalCStudied MaterialBNSubstrate / DielectricExpand
