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Spin symmetry of the bilayer graphene ground state

Freitag Frank, and Weiss Markus, and Maurand, Romain and Trbovic, Jelena and Schönenberger, Christian. (2013) Spin symmetry of the bilayer graphene ground state. Physical Review B, Vol. 87 , 161402.

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Official URL: http://edoc.unibas.ch/dok/A6212021

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Abstract

We show nonlinear transport experiments on clean, suspended bilayer graphene that reveal a gap in the density of states. Looking at the evolution of the gap in magnetic fields of different orientation, we find that the ground state is a spin-ordered phase. Of the three possible gapped ground states that are predicted by theory for equal charge distribution between the layers, we can therefore exclude the quantum anomalous Hall phase, leaving the layer antiferromagnet and the quantum spin Hall phase as the only possible gapped ground states for bilayer graphene
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Institute of Physics
ISSN:0163-1829
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:31 Jan 2014 09:51
Deposited On:31 Jan 2014 09:51

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