%0 Journal Article %1 WOS:000322777300003 %A Carozo, V %A Almeida, C M %A Fragneaud, B %A Bede, P M %A Moutinho, M V O %A Ribeiro-Soares, J %A Andrade, N F %A Filho, A G Souza %A Matos, M J S %A Wang, B %A Terrones, M %A Capaz, Rodrigo B %A Jorio, A %A Achete, C A %A Cancado, L G %C ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA %D 2013 %I AMER PHYSICAL SOC %J PHYSICAL REVIEW B %K imported %N 8 %R 10.1103/PhysRevB.88.085401 %T Resonance effects on the Raman spectra of graphene superlattices %V 88 %X In this work, a study of resonance effects in the Raman spectra of twisted bilayer graphene (tBLG) is presented. The analysis takes into account the effect of the mismatch angle theta between the two layers, and also of the excitation laser energy on the frequency, linewidth, and intensity of the main Raman features, namely the rotationally induced R band, the G band, and the second-order G' (or 2D) band. The resonance effects are explained based on the theta dependence of the tBLG electronic structure, as calculated by ab initio methodologies. The twist angle theta also defines the observation of a ``D-like'' band which obeys the double-resonance process, but relies on the superlattice along with long-range defects in order to fulfill momentum conservation. The study was possible due to the development of a route to produce and identify rotationally stacked bilayer graphene by means of atomic force microscopy (AFM).

@article{WOS:000322777300003, abstract = {In this work, a study of resonance effects in the Raman spectra of twisted bilayer graphene (tBLG) is presented. The analysis takes into account the effect of the mismatch angle theta between the two layers, and also of the excitation laser energy on the frequency, linewidth, and intensity of the main Raman features, namely the rotationally induced R band, the G band, and the second-order G' (or 2D) band. The resonance effects are explained based on the theta dependence of the tBLG electronic structure, as calculated by ab initio methodologies. The twist angle theta also defines the observation of a ``D-like'' band which obeys the double-resonance process, but relies on the superlattice along with long-range defects in order to fulfill momentum conservation. The study was possible due to the development of a route to produce and identify rotationally stacked bilayer graphene by means of atomic force microscopy (AFM).}, added-at = {2022-05-23T20:00:14.000+0200}, address = {ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}, author = {Carozo, V and Almeida, C M and Fragneaud, B and Bede, P M and Moutinho, M V O and Ribeiro-Soares, J and Andrade, N F and Filho, A G Souza and Matos, M J S and Wang, B and Terrones, M and Capaz, Rodrigo B and Jorio, A and Achete, C A and Cancado, L G}, biburl = {https://www.bibsonomy.org/bibtex/270eaabeb8d97a2edb9f405183dd22366/ppgfis_ufc_br}, doi = {10.1103/PhysRevB.88.085401}, interhash = {4e84197296b99a077e795c4bd8ffe6d5}, intrahash = {70eaabeb8d97a2edb9f405183dd22366}, issn = {2469-9950}, journal = {PHYSICAL REVIEW B}, keywords = {imported}, number = 8, publisher = {AMER PHYSICAL SOC}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Resonance effects on the Raman spectra of graphene superlattices}, tppubtype = {article}, volume = 88, year = 2013 }