منابع مشابه
Trigonal warping effect of carbon nanotubes
Chirality-dependent van Hove singularities ~vHs! of the one-dimensional electronic density of states ~DOS! are discussed in connection with resonant Raman spectroscopy. The effect of trigonal warping on the energy dispersion relations near the Fermi energy splits the peaks of the density of states for metallic nanotubes, and the magnitude of this effect depends on the chiral angle of the carbon...
متن کاملSecondary Electron Interference from Trigonal Warping in Clean Carbon Nanotubes.
We investigate Fabry-Perot interference in an ultraclean carbon nanotube resonator. The conductance shows a clear superstructure superimposed onto conventional Fabry-Perot oscillations. A sliding average over the fast oscillations reveals a characteristic slow modulation of the conductance as a function of the gate voltage. We identify the origin of this secondary interference in intervalley an...
متن کاملInfluence of Trigonal Warping on Interference Effects in Bilayer Graphene
Bilayer graphene (two coupled graphitic monolayers arranged according to Bernal stacking) is a twodimensional gapless semiconductor with a peculiar electronic spectrum different from the Dirac spectrum in the monolayer material. In particular, the electronic Fermi line in each of its valleys has a strong p ! p asymmetry due to trigonal warping, which suppresses the weak localization effect. We ...
متن کاملSecondary electron interference from trigonal warping in clean carbon nanotubes Supplementary Material
As electrode material, a 10/40 nm Ti/Pt bilayer is patterned on top of a degenerately doped Si substrate with a 500 nm thick insulating capping layer, see Fig. S1. In order to avoid contamination of the CNT, we grow the carbon nanotube as a last fabrication step across the contact electrodes separated by a 1.2μm trench. The identification of a promising device is done solely via room temperatur...
متن کاملProbing the electronic trigonal warping effect in individual single-wall carbon nanotubes using phonon spectra
We have studied the trigonal warping effect in metallic carbon nanotubes using resonance Raman scattering and examining the G0-band profile for individual metallic single-wall carbon nanotubes. We show that the observed splitting in the G0-band phonon spectra is directly correlated with the splitting in the singularities of the joint density of electronic states, i.e., detailed information abou...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2020
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.101.045404