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- W2195770043 abstract "It was shown in PHYSICAL REVIEW B 92, 085409 (2015) that the dynamics of a pair of electrons in graphene can be mapped onto that of a single particle with negative effective mass, leading to bound states of positive energy despite the formally repulsive interaction. However, this conclusion was based on the analysis of the two--particle problem, neglecting the role of the Dirac sea and the many--body effects. The two dominant such effects at zero temperature are screening of the Coulomb interaction by the Dirac sea, and reduction of the available phase space due to Pauli blocking of transitions into the states below the Fermi level. We show that these effects result in strong renormalization of the binding energy, but do not destroy the metastable states. Thus the binding energies are strongly dependent on the chemical potential owing to the combined effects of screening and Pauli blocking. Hence, the quasibound resonances can be tuned by electrostatic doping." @default.
- W2195770043 created "2016-06-24" @default.
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- W2195770043 date "2015-12-09" @default.
- W2195770043 modified "2023-09-27" @default.
- W2195770043 title "Bielectrons in the Dirac sea in graphene: the role of many--body effects" @default.
- W2195770043 hasPublicationYear "2015" @default.
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