2009/03/13 by Y. Kopelevich, Bertrand Raquet, B. Raquet +12
Materials Science · Physics and Astronomy · #Composite fermion #Condensed matter physics #Electron #Fractional quantum Hall effect #Graphene research and applications #Graphite #Materials science #Physics #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin Hall effect #Surface and Thin Film Phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.103.116802
15 pages, including 4 figures
arxiv created 2009/03/13 · openalex publication_date 2009/09/09 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Measurements of basal plane longitudinal \ensuremathρb(B) and Hall \ensuremathρH(B) resistivities were performed on highly oriented pyrolytic graphite samples in a pulsed magnetic field up to B=50 T applied perpendicular to graphene planes, and temperatures 1.5 K\ensuremath≤T\ensuremath≤4.2 K. At B>30 T and for all studied samples, we observed a sign change in \ensuremathρH(B) from electron- to holelike. For our best quality sample, the measurements revealed the enhancement in \ensuremathρb(B) for B>34 T (T=1.8 K), presumably associated with the field-driven charge density wave or Wigner crystallization transition. In addition, well-defined plateaus in \ensuremathρH(B) were detected in the ultraquantum limit revealing possible signatures of the fractional quantum Hall effect in graphite.