Spin and Valley Splittings in Multilayered Massless Dirac Fermion System

Details Spin and Valley Splittings in Multilayered Massless Dirac Fermion System Spin and Valley Splittings in Multilayered Massless Dirac Fermion System

2010-07-20

arxiv.org/abs/1007.3342v2

Phys. Rev. B 82, 121420(R) (2010)

Physics

Condensed Matter

Materials Science

4 page, 4 figures

Scientific paper

10.1103/PhysRevB.82.121420

The inter-layer magnetoresistance in a multilayered massless Dirac fermion system, $\alpha$-(BEDT-TTF)$_2$I$_3$, under hydrostatic pressure was investigated. We succeeded in detecting the zero-mode (n=0) Landau level and its spin splitting in the magnetic field normal to the 2D plane. We demonstrated that the effective Coulomb interaction in the magnetic field intensifies the spin splitting of zero-mode Landau carriers. At temperatures below 2K, magnetic fields above several Tesla break the twofold valley degeneracy.

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