2013/08/30 by Johannes Jobst, Ferdinand Kisslinger, Heiko B. Weber · 21 citations
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Conductance #Electrical resistivity and conductivity #Electron #Graphene #Graphene research and applications #Kondo effect #Kondo insulator #Logarithm #Magnetic field #Magnetic properties of thin films #Magnetoresistance #Materials science #Mathematics #Physics #Quantum and electron transport phenomena #Quantum mechanics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.88.155412
published in Physical Review B 88(15) (American Physical Society)
arxiv created 2013/08/30 · openalex publication_date 2013/10/11 · arxiv updated 2015/06/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss the difficulties in discovering the Kondo effect in the resistivity of graphene. Similarly to the Kondo effect, electron-electron interaction effects and weak localization appear as logarithmic corrections to the resistance. In order to disentangle these contributions, a refined analysis of the magnetoconductance and the magnetoresistance is introduced. We present numerical simulations which display the discrimination of both effects. Further, we present experimental data of magnetotransport. When magnetic molecules are added to graphene, a logarithmic correction to the conductance occurs, which apparently suggests Kondo physics. Our thorough evaluation scheme, however, reveals that this interpretation is not conclusive: The data can be equally explained by electron-electron interaction corrections in an inhomogeneous sample. Despite our refined analysis, we conclude that additional spectroscopic information will be necessary to unambiguously identify the Kondo effect.