Artículos de revistas
Searching For The Fractional Quantum Hall Effect In Graphite
Registro en:
Physical Review Letters. , v. 103, n. 11, p. - , 2009.
319007
10.1103/PhysRevLett.103.116802
2-s2.0-70249142135
Autor
Kopelevich Y.
Raquet B.
Goiran M.
Escoffier W.
Da Silva R.R.
Medina Pantoja J.C.
Luk'yanchuk I.A.
Sinchenko A.
Monceau P.
Institución
Resumen
Measurements of basal plane longitudinal ρb(B) and Hall ρH(B) resistivities were performed on highly oriented pyrolytic graphite samples in a pulsed magnetic field up to B=50T applied perpendicular to graphene planes, and temperatures 1.5K≤T≤4.2K. At B>30T and for all studied samples, we observed a sign change in ρH(B) from electron- to holelike. For our best quality sample, the measurements revealed the enhancement in ρb(B) for B>34T (T=1.8K), presumably associated with the field-driven charge density wave or Wigner crystallization transition. In addition, well-defined plateaus in ρH(B) were detected in the ultraquantum limit revealing possible signatures of the fractional quantum Hall effect in graphite. © 2009 The American Physical Society. 103 11
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