Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-07-14
Phys.Lett.A374:2957,2010
Physics
Condensed Matter
Strongly Correlated Electrons
7 pages, 3 figures
Scientific paper
10.1016/j.physleta.2010.05.011
The strong Coulomb interaction between massless Dirac fermions can drive a semimetal-insulator transition in single-layer graphene by dynamically generating an excitonic fermion gap. There is a critical interaction strength $\lambda_c$ that separates the semimetal phase from the insulator phase. We calculate the specific heat and susceptibility of the system and show that they exhibit distinct behaviors in the semimetal and insulator phases.
Li Wangrong
Liu Guo-Zhu
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