90 citations · 1.1k across the 60 of their papers we have counts for
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The electron-hole superfluidity in two coaxial nanotubes
Oleg L. Berman, Ilya Grigorenko, Roman Ya. Kezerashvili
The superfluid phase and Coulomb drag effect caused by the pairing in the system of spatially separated electrons and holes in two coaxial cylindrical nanotubes are predicted. It i…
Phase transitions in the two-dimensional electron-hole gas
Oleg L. Berman, Roman Ya. Kezerashvili, Klaus Ziegler
A first order phase transition between a BCS phase and an insulating Mott phase for a gas of spatially separated electrons and holes with tunable Coulomb interaction and variable d…
Graphene nanoribbon based spaser
Oleg L. Berman, Roman Ya. Kezerashvili, Yurii E. Lozovik
A novel type of spaser with the net amplification of surface plasmons (SPs) in doped graphene nanoribbon is proposed. The plasmons in THz region can be generated in a dopped graphe…
Long-lifetime Polariton BEC in a Microcavity with an Embedded Quantum Well and Graphene
O. L. Berman, R. Ya. Kezerashvili, G. V. Kolmakov
We study the propagation of a Bose-Einstein condensate (BEC) of long-lifetime exciton polaritons in a high-quality microcavity with an embedded semiconductor quantum well or a grap…