Kohn anomalies and electron-phonon interactions in graphite.
TLDR
It is demonstrated that graphite phonon dispersions have two Kohn anomalies at the Gamma-E(2g) and K-A'1 modes, and by an exact analytic derivation, it is shown that the slope of these kinks is proportional to the square of the electron-phonon coupling (EPC).Abstract:
We demonstrate that graphite phonon dispersions have two Kohn anomalies at the Gamma-E(2g) and K-A'1 modes. The anomalies are revealed by two sharp kinks. By an exact analytic derivation, we show that the slope of these kinks is proportional to the square of the electron-phonon coupling (EPC). Thus, we can directly measure the EPC from the experimental dispersions. The Gamma-E(2g) and K-A'1 EPCs are particularly large, while they are negligible for all the other modes at Gamma and K.read more
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References
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High-field quasiballistic transport in short carbon nanotubes.
TL;DR: Transport through very short nanotube nanotubes is free of significant acoustic and optical phonon scattering and thus ballistic and quasiballistic at the low- and high-bias voltage limits, respectively.