Phonon-phonon interactions and phonon damping in carbon nanotubes
نویسندگان
چکیده
منابع مشابه
Doping and phonon renormalization in carbon nanotubes.
We show that the Raman frequency associated with the vibrational mode at approximately 1,580 cm(-1) (the G mode) in both metallic and semiconducting carbon nanotubes shifts in response to changes in the charge density induced by an external gate field. These changes in the Raman spectra provide us with a powerful tool for probing local doping in carbon nanotubes in electronic device structures,...
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Rohan Dhall,1 Shun-Wen Chang,2 Zuwei Liu,2 and Stephen B. Cronin1,2,3,* 1Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA 2Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, USA 3Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA (Received 11...
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We show that electron-phonon coupling EPC is the major source of broadening for the Raman G and G− peaks in graphite and metallic nanotubes. This allows us to directly measure the optical-phonon EPCs from the G and G− linewidths. The experimental EPCs compare extremely well with those from the density functional theory. We show that the EPC explains the difference in the Raman spectra of metall...
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We study the heat current J in a classical one-dimensional disordered chain with on-site pinning and with ends connected to stochastic thermal reservoirs at different temperatures. In the absence of anharmonicity all modes are localized and there is a gap in the spectrum. Consequently J decays exponentially with system size N. Using simulations we find that even a small amount of anharmonicity ...
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Within the Dirac theory of the electronic properties of graphene, smoothly varying lattice strain affects the Dirac carriers through a synthetic gauge field. For static lattice strain, the gauge field induces a synthetic magnetic field which is known to suppress weak localization corrections by a dynamical breaking of timereversal symmetry. When the lattice strain is time dependent, as in conne...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2009
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.79.205408