J. M. Schneider

Graphite from the Viewpoint of Landau Level Spectroscopy: An Effective Graphene Bilayer and Monolayer

We describe an infrared transmission study of a thin layer of bulk graphite in magnetic fields up to B=34 T. Two series of absorption lines whose energy scales as sqrt[B] and B are present in the spectra and identified as contributions of massless holes at the H point and massive electrons in the vicinity of the K point, respectively. We find that the optical response of the K point electrons corresponds, over a wide range of energy and magnetic field, to a graphene bilayer with an effective interlayer coupling 2gamma_{1}, twice the value for a real graphene bilayer, which reflects the crystal ordering of bulk graphite along the c axis. The K point electrons thus behave as massive Dirac fermions with a mass enhanced twice in comparison to a true graphene bilayer.

Consistent interpretation of the low-temperature magnetotransport in graphite using the Slonczewski-Weiss-McClure 3D band-structure calculations.

Magnetotransport of natural graphite and highly oriented pyrolytic graphite has been measured at mK temperatures. Quantum oscillations for both electron and hole carriers are observed with an orbital angular momentum quantum number up to N approximately 90. A remarkable agreement is obtained when comparing the data and the predictions of the Slonczewski-Weiss-McClure tight binding model for massive fermions. No evidence for Dirac fermions is observed in the transport data which are dominated by the crossing of the Landau bands at the Fermi level, corresponding to dE/dk_{z}=0, which occurs away from the H point where Dirac fermions are expected.

Electronic excitations and electron-phonon coupling in bulk graphite through Raman scattering in high magnetic fields

We use polarized magneto-Raman scattering to study purely electronic excitations and the electron-phonon coupling in bulk graphite. At a temperature of 4.2 K and in magnetic fields up to 28 T we observe

Optical absorption to probe the quantum Hall ferromagnet at filling factor nu=1.

K

Using the de Haas-van Alphen effect to map out the closed three-dimensional Fermi surface of natural graphite.

-point electronic excitations involving Landau bands with

Magneto-transmission of multi-layer epitaxial graphene and bulk graphite: A comparison

\Delta |n|=0

Origin of electron-hole asymmetry in graphite and graphene

and with

Using magnetotransport to determine the spin splitting in graphite

\Delta |n|=\pm2

Schneideret al.Reply

that can be selected by controlling the angular momentum of the excitation laser and of the scattered light. The magneto-phonon effect involving the

Schneider et al. Reply

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