Effects of electron-electron interactions on the electronic Raman scattering of graphite in high magnetic fields
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Abstract
We report the observation of strongly temperature-dependent, asymmetric
spectral lines in electronic Raman scattering spectra of graphite in a high
magnetic field up to 45 T applied along the c-axis. The magnetic field
quantizes the in-plane motion, while the out-of-plane motion remains free,
effectively reducing the system dimension from three to one. Optically created
electron-hole pairs interact with, or shake up, the one-dimensional Fermi sea
in the lowest Landau subbands. Based on the Tomonaga-Luttinger liquid theory,
we show that interaction effects modify the van Hove singularity to the form
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1550-235X
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Engineering and Physical Sciences Research Council (EP/K017144/1)
European Commission (604391)