Anomalous valley magnetic moment of graphene
Department of Applied Physics, Non-equilibrium Condensed Matter and Quantum Engineering Laboratory, KLME, Xi'an Jiaotong University - Xi'an, 710049, PRC
Corresponding author: email@example.com
Accepted: 15 January 2010
Carrier interactions on graphene are studied. The study shows that besides the well-known Coulomb repulsion between carriers, there also exist four-fermion interactions associated with the U-process, one of which attracts carriers in different valleys. We then calculate the contributions to the valley magnetic moment from vertex corrections and from four-fermion corrections explicitly. The relative contributions are - 18% and 3%, respectively. Lastly we point out that we can mimic the heavy-quarkonium system by carrier interactions in graphene.
PACS: 72.80.Vp – Electronic transport in graphene / 75.75.-c – Magnetic properties of nanostructures / 75.10.Jm – Quantized spin models, including quantum spin frustration
© EPLA, 2010