2014/06/14 by Arnaud Demion, Alberto D. Verga, Alberto Verga · 5 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Electron #Graphene #Graphene research and applications #Materials science #Nanotechnology #Nonlinear system #Paramagnetism #Physics #Quantum and electron transport phenomena #Quantum mechanics #Spin polarization #Theoretical and Computational Physics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.90.085412
published in Physical Review B 90(8) (American Physical Society) · 9 pages, 8 figures
arxiv created 2014/06/14 · openalex publication_date 2014/08/11 · arxiv updated 2014/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The influence of magnetic impurities on the transport properties of graphene is investigated in the regime of strong applied electric fields. As a result of electron-hole pair creation, the response becomes nonlinear and dependent on the magnetic polarization. In the paramagnetic phase, time reversal symmetry is statistically preserved, and transport properties are similar to the clean case. At variance, in the antiferromagnetic phase, the system undergoes a transition between a superdiffusive to a subdiffusive spreading of a wave packet, signaling the development of localized states. This critical regime is characterized by the appearance of electronic states with a multifractal geometry near the gap. The local density of states concentrates in large patches having a definite charge-spin correlation. In this state, the conductivity tends to half the minimum conductivity of clean graphene.