Variational approach to the excitonic phase transition in graphene

Physical Review B - Condensed Matter and Materials Physics

Volumn 82, Issue 12, 2010, Pages

  Sabio, J ^a,b   Sols, F ^b   Guinea, F ^a  

^a INSTITUTO DE CIENCIA DE MATERIALES DE MADRID   (Spain)

^b UNIVERSIDAD COMPLUTENSE DE MADRID   (Spain)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77957742616     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.82.121413     Document Type: Article

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24. Monte Carlo results suggest a critical coupling in the range of expected values in suspended samples (Ref.), which is smaller than the value predicted by our variational ansatz. The origin of this discrepancy is unclear. It could arise from differences in the regularization of the short-range part of the interaction or in the treatment of screening at high frequencies.