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Coexistence of Van Hove Singularities and Pseudomagnetic Fields in Modulated Graphene Bilayer
Jana Vejpravova, Barbara Pacakova, Mildred S. Dresselhaus +2
The stacking and bending of graphene are trivial but extremely powerful agents of control over graphene's manifold physics. By changing the twist angle, one can drive the system ov…
Three-dimensional non-Bosonic non-Fermionic quasiparticle through a quantized topological defect of crystal dislocation
Mingda Li, Qichen Song, Mildred S. Dresselhaus +1
It is a fundamental postulate that quasiparticles in 3D space obey either Bosonic or Fermionic statistics, satisfying either canonical commutation or anti-commutation relation. How…
Fermi energy dependence of first- and second-order Raman spectra in graphene: Kohn anomaly and quantum interference effect
Eddwi H. Hasdeo, Ahmad R. T. Nugraha, Mildred Dresselhaus +1
Intensity of the first- and the second-order Raman spectra are calculated as a function of the Fermi energy. We show that the Kohn anomaly effect, i.e., phonon frequency renormaliz…
Kohn Anomalies in Graphene Nanoribbons
Ken-ichi Sasaki, Masayuki Yamamoto, Shuichi Murakami +6
The quantum corrections to the energies of the point optical phonon modes (Kohn anomalies) in graphene nanoribbons are investigated. We show theoretically that the longitudinal…
Chirality dependent frequency shift of radial breathing mode in metallic carbon nanotubes
K. Sasaki, R. Saito, G. Dresselhaus +3
A phonon frequency shift of the radial breathing mode for metallic single wall carbon nanotubes is predicted as a function of Fermi energy. Armchair nanotubes do not show any frequ…
Curvature induced optical phonon frequency shift in metallic carbon nanotubes
K. Sasaki, R. Saito, G. Dresselhaus +3
The quantum corrections to the frequencies of the point longitudinal optical (LO) and transverse optical (TO) phonon modes in carbon nanotubes are investigated theoretically. T…