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|Title:||Quantum Monte Carlo study of electrostatic potential in graphene|
|Authors:||Astrakhantsev, N. Y.|
Braguta, V. V.
Katsnelson, M. I.
Nikolaev, A. A.
Ulybyshev, M. V.
|Publisher:||American Physical Society|
|Citation:||Quantum Monte Carlo study of electrostatic potential in graphene / N. Y. Astrakhantsev, V. V. Braguta, M. I. Katsnelson, et al. — DOI 10.1103/PhysRevB.97.035102 // Physical Review B. — 2018. — Vol. 97. — Iss. 3. — 035102.|
|Abstract:||In this paper the interaction potential between static charges in suspended graphene is studied within the quantum Monte Carlo approach. We calculated the dielectric permittivity of suspended graphene for a set of temperatures and extrapolated our results to zero temperature. The dielectric permittivity at zero temperature is found to have the following properties. At zero distance ϵ=2.24±0.02. Then it rises and at a large distance the dielectric permittivity reaches the plateau ϵ≃4.20±0.66. The results obtained in this paper allow us to draw a conclusion that full account of many-body effects in the dielectric permittivity of suspended graphene gives ϵ very close to the one-loop results. Contrary to the one-loop result, the two-loop prediction for the dielectric permittivity deviates from our result. So one can expect large higher order corrections to the two-loop prediction for the dielectric permittivity of suspended graphene. © 2018 American Physical Society.|
MONTE CARLO METHODS
QUANTUM MONTE CARLO
QUANTUM MONTE CARLO STUDIES
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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