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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1102.3300 (cond-mat)
[Submitted on 16 Feb 2011]

Title:Unveiling the Landau Levels Structure of Graphene Nanoribbons

Authors:Rebeca Ribeiro, Jean-Marie Poumirol, Alessandro Cresti, Walter Escoffier, Michel Goiran, Jean-Marc Broto, Stephan Roche, Bertrand Raquet
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Abstract:Magnetotransport measurements are performed in ultraclean (lithographically patterned) graphene nanoribbons down to 70 nm. At high magnetic fields, a fragmentation of the electronic spectrum into a Landau levels pattern with unusual features is unveiled. The singular Landau spectrum reveals large magneto-oscillations of the Fermi energy and valley degeneracy lifting. Quantum simulations suggest some disorder threshold at the origin of mixing between opposite chiral magnetic edge states and disappearance of quantum Hall effect.
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Cite as: arXiv:1102.3300 [cond-mat.mes-hall]
  (or arXiv:1102.3300v1 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1102.3300
Related DOI: https://doi.org/10.1103/PhysRevLett.107.086601

Submission history

From: Rebeca Ribeiro [view email]
[v1] Wed, 16 Feb 2011 10:59:25 UTC (1,390 KB)
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