Abstract
The interlayer magnetoresistance in a multilayered massless Dirac fermion system, , under hydrostatic pressure was investigated. We succeeded in detecting the zero-mode Landau level and its spin splitting in the magnetic field normal to the two-dimensional plane. We demonstrated that the effective Coulomb interaction in the magnetic field intensifies the spin splitting of zero-mode Landau carriers. At temperatures below 2 K, magnetic fields above several Tesla break the twofold valley degeneracy.
- Received 20 July 2010
DOI:https://doi.org/10.1103/PhysRevB.82.121420
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